Weight hourly space velocity 48, and a weight hourly space velocity of 1. 1-5), and the weight hourly space velocity (WHSV, Eq. 2. DRM are indispensable for the kinetic studies as well as efficient reactor design [8]. 2 Development Engineer, Engineering Division, 410 Sackett Point Rd. WHSV is a commonly used parameter in chemical engineering. g ethylene g −1 cat h −1). It is abbreviated as GHSV. The effects of three reaction variables, i. 3 Torr Sep 1, 2015 · The performance of the MR has been first analyzed, in terms of methanol conversion and gas selectivity. 5 h −1 resulted in the highest yield of coke, nearly 52 wt%, along with a 3. Thus, as displayed in Fig. Learn about different types of space velocities (GHSV, LHSV, WHSV) and how they affect hydrotreating reactions, feed vaporization and coke formation. 314 [J/(K mol)] r: volumetric reaction rate [mol/(m3 s)] T: temperature Nov 15, 2024 · The operating temperature, operating pressure, CO 2:CH 4 feed ratio, and weight hourly space velocity (WHSV) were kept constant during the evaluation. An external diffusion limitation evaluation was conducted at 700 °C, with catalyst loadings of 30, 45, 60, and 90 mg and flowrate variations of 30, 45, 60, and 90 mL min -1 . Weight hourly space velocity is defined as total mass feed flow rate per … Jan 1, 2024 · The effects of weight hourly space velocity (WHSV) and particle shape are further investigated in analyzing conversion, concentration variation, flow structure and pressure drop. The results indicated that the Zn/ZSM-5 molecular sieve was most beneficialto aromatization; the relationship between the change of B/L caused by Zn content and aromatics selectivity was further studied. The standard of ASTM-D5453 was used for measuring the total sulfur of the feed and products. 5/1. Nov 21, 2016 · The weight hour space velocity (WHSV) is defined as: where is mass flow rate of feed (mg·h −1), is mass of catalysts loaded on the plate (mg). 0 MPa) were varied in the study. Depend-ent variables of reaction performance of bio- For hydrotreaters and hydrocrackers, space velocity is defined either in terms of LHSV [liquid hourly space velocity] or WHSV [weight hourly space velocity]. Over the ranges of experimental conditions examined, calcined dolomite revealed better catalytic performance at the presence of steam. （3）空速(Space velocity)是指单位时间内通过单位质量(或体积)催化剂的反 应物的质量(或体积)。时间一般以小时为单位，当反应物和催化剂的量以质量为 单位时，称为重时空速(Weight hourly space velocity，WHSV)，而以体积为单位 时，称为体积空速。 Aug 10, 2020 · Subsequently, the reactant gases of H 2 /N 2 /CO 2 in a ratio of 64/20/16 (i. Time on stream dependence of (a) aniline conversion and (b) NMA yield on Cul-xZnXFe204 at 3000C and WHSV = 3. r2. nature catalysis Volume 6 | June 2023 | 462–463 | 463 ews iews Jun 15, 2014 · Effect of weight hourly space velocity (WHSV, h −1) on solketal yield and glycerol conversion (other reaction conditions: 40 °C, 600 psi and acetone equivalent of 2. 𝑊𝐻𝑆𝑉= (𝐹 Aug 1, 2017 · This research was aimed to study effects of Weight Hourly Space Velocity (WHSV) and the catalyst diameter on performance of the hybrid catalytic-plasma reactor for biodiesel synthesis. In this case, WHSV was calculated with equation (4): (4) WHSV = Q m, M B Y m cat where Q m,MBY is the mass-flow rate of MBY flowing through the catalyst bed that contains mass of the catalyst m cat. We hypothesize that the low ethylene flow rate allowed （3）空速(Space velocity) 是指单位时间内通过单位质量(或体积)催化剂的反应物的质量(或体积)。时间一般以小时为单位，当反应物和催化剂的量以质量为单位时，称为重时空速(Weight hourly space velocity 计算： 气体总量1000+45+35+40=1120 sccm(标况毫升每分,Nml/min ) Feb 14, 2020 · In this study, dry reforming of methane (DRM) employing a Ni/MgO–Al 2 O 3 catalyst was undertaken to evaluate the effects of temperature (650, 700 and 750 °C), weight hourly space velocity (7. 沪江词库精选weight (hourly) space velocity (WHSV)是什么意思、英语单词推荐、翻译weight (hourly) space velocity (WHSV)是什么意思。 Jul 1, 2020 · The hydrodeoxygenation (HDO) of phenol catalyzed by Zn/SiO 2 under atmospheric H 2 pressure was investigated in a continuous fixed bed reactor. The range of these process parameters were selected by considering the relevant literature and the equipment limitation. Also, the effects of weight hourly space velocity (WHSV) and temperature on methanol con- version were investigated. 严格讲，这里并不是所有都是体积空速，大多数是质量空速。WHSV ，weight hourly space velocity ，重量时空速度 具体后面gNi–1不一样应该和催化剂种类性质有关 请问体积空速，为什么文献里面单位是 L h–1 就是气体体积流量除以催化剂质量吗 gas hourly space velocity简称GHSV按理说催化剂的量应该用体积表示，但是很多人用质量习惯了。也许质量更容易定量一些！ 用质量定量，那就是WHSV了，我看的文献里有同时用GHSV和WHSV的，但是单位都是一样，何解， Download scientific diagram | Effect of weight hourly space velocity (WHSV) on the olefin + aromatic carbon yield. The relationship between conversion, actual gas hourly space velocity, GHSV and catalyst activity, k, is defined in first order reaction model as: rate of disappearance of component a = dCa / dt = k * Ca GHSV = gas hourly space velocity Gs = gravity (force) GSA = geometric surface area hr = hour Hz = hertz in = inch kJ = kilojoules L = length m = meter ml = milliliter 1 Research Engineer, Microlith® Products, 410 Sackett Point Rd. 51 h −1. This measurement is the quotient of the mass flow rate of the reactants divided by the mass of the catalyst in the reactor. WHSV was calculated based on the mass flow rate of ethylene per weight of catalyst in an hourly basis (i. 2. 2 Acetylation of anisole at 90°C in a fixed bed reactor. May 10, 2018 · The effect of weight hourly space velocity (WHSV): The flow rate of glycerol is expected to have a significant effect on the glycerol hydrogenolysis and to examine this, Jun 1, 2023 · The recent technology achievements include but are not limited to improved hydrotreating performance with higher weight hourly space velocity (WHSV) and lower cost catalyst for the 2019 SOT assessment [8], increases in the HTL reactor liquid hourly space velocity (LHSV), lower cost designs for the sludge pumping and heating system for the 2020 WHSV stands for "Weight Hourly Space Velocity". 化学辞典 第2版 - 空間速度の用語解説 - 略称SV．流通系の反応装置の反応時間や滞留時間を表す概念で，反応装置容積と原料供給速度との関係を示す．反応層の体積を Vr，供給反応流体の体積供給速度を Fv としたとき Fv/Vr の比をいう．時間の逆数の次元をもつ量で，通常，単位は h－1 Space time and space velocity Gas hourly space velocity (GHSV): In chemical reaction engineering, space velocity is sometimes reported in terms of gas hourly space velocity, which is the ratio of volume per time in hours of the gaseous feed to the volume of the reactor. It is also inverse of reactor space time. Igor in his studies of ketonization of Space velocity may refer to: Space velocity (astronomy) , the velocity of a star in the galactic coordinate system Space velocity (chemistry) , the relation between volumetric flow rate and reactor volume in a chemical reactor 体积 空速又可分为两种情况：如果反应物为气体，可用气体空速 (Gas hourly space velocity ， GHSV)(注意此时气体体积是标准状态下的体积 )；如果反应物为液体，则可用液时空速 (Liquid hourly space velocity，LHSV)。 In industrial practice, the terms WHSV (weight hourly space velocity), LHSV (liquid hourly space velocity), and GHSV (gas hourly space velocity) are also used -defined as the ratio of the mass flow (WHSV) or volumetric flow (LHSVand GHSV, usually at STP) of the liquid May 5, 2020 · การเลือกค่า WHSV (Weight Hourly Space Velocity) สำหรับการทดลอง; การวัดความเป็นกรดบนพื้นผิวของแข็ง (อีกครั้ง) SV値（えすぶいち/空間速度/Space Velocity） SV値 とは、触媒による排ガス処理 や排気の後処 Fig. Ratio between the initial conversion of anisole and the maximum conversion which can be obtained vs. Data Jan 1, 2009 · The reactor was packed with 1. Effects of weight hourly space veloc-ity on reactor performance . 1 e, the effect of three different WHSV on toluene oxidation over the best-performed CoCu 0. In this paper, applying a high/low-weight hourly space velocity technique, the reaction behavior in a 当反应物和催化剂的量以质量为单位时,称为重时空速（Weight hourly space velocity,缩写：WHSV）. 5Fe204 at 300°C and WHSV = 3. 25 mm May 1, 2024 · The experimental results showed that a 3DNP-Cu/ZnO SCR activated with MeOH/H 2 O for 20 min exhibited a high methanol conversion rate of 98. 6, and weight hourly space velocity (WHSV) of 3. Although both terms are expressed in the same units, the calculations yield different values. The partial pressure of guaiacol is defined as: Aug 1, 2017 · Weight Hourly Space Velocity (WHSV) is the mass flow rate of the reactants divided by the mass of the catalyst in the reactor (Buchori et al. 5 h −1. Aug 7, 2017 · Tables 3, 4, and 5 list the effect of temperature and weight hourly space velocity (WHSV) on ethanol conversion, ethylene yield, ethylene selectivity, and space-time yield (STY) by using the ZSM-5, ZSM-5-deAl, ZSM-5-P, ZSM-5-La, and Al 2 O 3 (BASF) catalysts. 22–1. 空速有两种表达形式,一种是体积空速,另一种是质量空速. 1 h −1 for a typical temperature Jan 14, 2018 · 体积空速又可分为两种情况：如果反应物为气体，可用气体空速(Gas hourly space velocity，GHSV)(注意此时气体体积是标准状态下的体积)；如果反应物为液体，则可用液时空速(Liquid hourly space velocity，LHSV)。空速可以只针对一种反应物而言，也可以针对全部反应物而言 space velocity can be expressed mathematically as SV ? ?0 / V. 95 h −1 weight hourly space velocity (WHSV) and H 2 O/CH 3 OH feed molar ratio equal to 2. com LHSV is the liquid hourly space velocity, which is the ratio of liquid volume flow per hour to catalyst volume. 0). Figure 17. The catalytic activity of all catalysts became significant from 200 to 280 °C. 7. (BPSD times 5. Can we report the GHSV based on mL*gr-1cat h−1 because it WHSV (weight hourly space velocity) = (lb of feed/hr)/(lb of catalyst). 56–4. 14. In this case, the packed-bed reactor This research was aimed to study effects of Weight Hourly Space Velocity (WHSV) and the catalyst diameter on performance of the hybrid catalytic-plasma reactor for biodiesel synthesis. The Fe-doped catalyst resulted in high conversions relative to the other catalysts studied. Weight Hourly Space Velocity (WHSV) is the mass flow rate of the reactants divided by the mass of the catalyst in the reactor. By using Lanlian fluid catalytic cracked (FCC) gasoline as a feedstock, the effects of weight hour space velocity (WHSV) on the product distribution, light oil compound, off-gas, and liquefied petroleum gas were researched in a confined fluidized bed reactor. Weight Hourly Space Velocity listed as WHSV. Thus, the fundamental reaction behavior between methane and iron oxide is of great importance. The developed set of optimized kinetic Oct 1, 2017 · Experimental parameters were optimized by the analysis of variance (ANOVA) by D-optimal experimental design using three levels of pressure, temperature, weight hourly space velocity (WHSV) and catalyst particle size. Space velocity can be established on a volume basis (LHSV) or on a weight basis (weight hourly space velocity [WHSV]) Totaltvolumetric (feed fatelto jthe fenctor, jm /h Total catalyst volume, m The severity of the process increases inversely to LHSV. The hot-spot formation and pressure drop within the reactor were investigated according to the diameter with regards to parameters such as weight hourly space velocity (WHSV) and shell cooling temperature. 2 g) of active sulphated zinc oxide solid acid catalysts was loaded into discharge zone of the reactor. The reaction Aug 11, 2022 · On the basis of which, the effects of the catalyst packing temperature, the propane weight hourly space velocity (WHSV), and the PDH catalyst composition on propane conversion were evaluated. Figure adapted from ref. h Cite Sep 19, 2018 · 催化学科中的“空速”概念讨论及区分（重时空速，体积空速，液时空速，气体空速）（1）空速主要表征催化反应随催化剂的量与气流流速之比所引起催化活性的变化。由于对于一个具体的催化体系，不同空速下催化活性的表现不同，所以在报道结果时空速是非常重要的。通常的定义是这样，ml催化 Mar 1, 2009 · The influence of steam to MSW ratios (S/M) on gas production and composition was studied at 900 °C over the S/M range of 0. Space velocity is the ratio of flow rate of feeds to the volume of reactor or catalyst. Weight hourly space velocity (WHSV, g·g-1·h-1) is defined as the quotient of the mass flow-rate of the propane divided by the mass of the catalyst (wcat) in the reactor at the condition of standard temperature and pressure (STP), as illustrated in equation (S5), where Vm is standard molar volume (22. The reason for the above results is mainly that if the weight hourly space velocity is small, the contact time of the catalyst with the reaction product is long, so that the conversion rate of formaldehyde is remarkably increased. Q: A: How to abbreviate "Weight Hourly Space Velocity"? "Weight Hourly Space Velocity" can be abbreviated as WHSV. 58 h-1 with a CH30H PhNH2 H20 feed composition of 3 1 1 of (c) Time on stream and weight hour space velocity (inset) dependence of aniline conversion and NMA selectivity on Cu0. 当反应物和催化剂的量以质量为单位时,称为重时空速（Weight hourly space velocity,缩写：WHSV）. Weight hourly space velocity (WHSV) is defined as the total mass feed flow rate per hour divided by the weight of catalyst in the reactor. A possible pathway of furfural catalytic conversion was proposed according to the experiments. 4 a). WHSV weight hourly space velocity 33 . For a cylindrical section, volume of catalyst monolith = pie. 7 , Springer Nature Limited. e. Inverse of space velocity is the contact time for the liquid to be in contact with the catalyst. Oct 30, 2022 · Under the conditions of y H2,out and y CO,allow, there are six operation types, of which 2 types are within the operation window and 4 types are not within the operation window as the temperature, weight hourly space velocity (WHSV) and steam to methane (S/C) molar ratio vary. 39–1. Tables 3, 4, and 5 list the effect of temperature and weight hourly space velocity (WHSV) on ethanol conversion, ethylene yield, ethylene selectivity, and space-time yield (STY) by using the ZSM-5, ZSM-5-deAl, ZSM-5-P, ZSM-5-La, and Al 2 O 3 (BASF) catalysts. 20/03/2017 A: Eric Vetters, ProCorr Consulting Services, ewvetters@yahoo. , H 2 /CO 2 = 4/1) was introduced at 270 mL min −1 (STP), corresponding to a weight hourly space velocity (WHSV) of 270 L g cat −1 h −1 or a gas hourly space velocity (GHSV) of 34,000 h −1 with regards to the catalytic bed length of 3 cm. 英文缩写: WHSV: 英文全称: weight hourly space velocity: 中文解释: 重量时空速度: 缩写分类: 化学化工, Aug 7, 2017 · Experimental conditions including the catalyst type [active aluminum oxide (γ-Al 2 O 3) and ZSM-5 zeolite catalyst modified using two-stage through dealumination or desilication and by using the impregnation method with phosphorous and lanthanum], weight hourly space velocity (WHSV), ethanol concentration, and reaction temperature were . Q: A: What is WHSV abbreviation? 当反应物和催化剂的量以质量为单位时，称为重时空速（weight hourly space velocity，缩写：whsv）。而以体积为单位时，称为体积空速。 体积空速又可分为两种情况： 如果反应物为气体，可用气体空速；如果反应物为液体，则可用液时空速。 "1. WHSV是化工中常用的参数。 "2. Jan 27, 2020 · All samples were tested at 450 °C, 15 bar, H 2 /Oil = 150 Nml/ml, and weight hourly space velocity (WHSV) = 1 h −1 in a fixed-bed reactor (a Catatest reactor system). 1. Nov 1, 2016 · The effects of reaction conditions (reaction time, catalytic temperature, weight hourly space velocity and furfural partial pressure) on the carbon yield and selectivity of products were studied using a fixed bed reactor. LHSV is calculated by converting rated BPSD into equivalent ft3@60F per hr, i. Jul 15, 2021 · An isothermal fixed bed reactor was used to execute the catalytic reactions with a temperature ranging between 200 and 400 ℃, a total pressure between 20 and 40 bar, varying H 2:CO 2 molar feed ratios (2:1–6:1) and a range of WHSV (weight hourly space velocity) from 6000 to 16000 mL g cat −1 h −1. This Mar 1, 2009 · The influence of steam to MSW ratios (S/M) on gas production and composition was studied at 900 °C over the S/M range of 0. 0 g feed /(g cat ·h), 100% LA conversion and 84% GVL yield were obtained. Oct 25, 2018 · A continuous tubular reactor of 9 mm internal diameter, 400 mm long, was adopted to collect the kinetic data, by feeding downflow a reactant gas mixture consisting of hydrogen and nitrogen in different volumetric ratio (3:1 or 1. 5, 15 and 30 L h −1 g cat −1) and catalyst MgO content (3, 5 and 10 wt%) on catalytic activity and coke-resistance. 1-4), the gas hourly space velocity (GHSV, Eq. 8 m), where the weight hourly space velocity (WHSV; Eq. 5Zn0. weight hourly space velocity) prędkość masowa na jednostkę czasu i masy. In this case, the packed-bed reactor technology is the most appropriate technology due to its simplicity of installation and operation. BPSD/lb = 账?(Space velocity)的定义：单位时间单位催化剂上通过的反应物的量。空速可以分为重时空速和体积空速。重时空速也称为重量空速，定义为每小时单位质量催化剂上通过的反应物的质量，WHSV是Weight Hourly Space velocity的缩写。 允许 空速 越高表示催化剂活性越高，装置处理能力越大。 但是， 空速 不能无限提高。 对于给定的装置，进料量增加时 空速 增大， 空速 大意味着单位时间里通过催化剂的原料多，原料在催化剂上的停留时间短，反应深度浅。 Gas hourly space velocity; GHSV) ist der Volumenstrom ˙ eines Fluids bezogen auf ein Referenzvolumen . Effect of WHSV on performance of hybrid catalytic-plasma reactor is shown in Figure 1. 空間速度（sv）をご紹介します。株式会社トーケミは全国一のマーケットシェアを誇るろ過材をはじめ、ケミカルポンプ、撹拌機、水質制御システムなど水処理に関する製品のご提供、またご提案からアフターサービスまでご対応します。 空速(space velocity)是指单位时间内通过单位质量(或体积)催化剂的反应物的质量(或体积)。时间一般以小时为单位，当反应物和催化剂的量以质量为单位时，称为重时空速(weight hourly space velocity，whsv)，而以体积为单位时，称为体积空速。 Gaseous Hourly Space Velocity (GHSV = 5,144 and 10,289 h-1) were varied as principle parameters. WHSV * 60 = 99960 ~ 100,000 ml g-1h-1. 58 h-1. Dec 8, 2023 · 当反应物和催化剂的量以质量为单位时，称为重时空速（weight hourly space velocity，缩写：whsv）。而以体积为单位时，称为体积空速。 体积空速又可分为两种情况： 如果反应物为气体，可用气体空速；如果反应物为液体，则可用液时空速。 Jul 13, 2020 · The yield reached a maximum of 61. ". Reaction conditions: reaction temperature, 600 °C; partial pressure, 12. The weight-hourly space velocity (WHSV, 8 - 120 L/g cat ·h), reaction temperature (160 - 260 °C) and reaction pressure (1. Alternatively, if the weight charge rate of naphtha is divided by the weight of catalyst, the resulting quotient, also expressed in units of 1/h, is the weighted hourly space velocity (WHSV). Weight/Flow 比率。V/FにおけるVの代わりに触媒の重量Wで表示したもの。反応器が小さい場合には触媒の容器誤差が大きいもので、変りに重量Wがよく用いられる。 WHSV: 重量空間速度(Weight Hourly Space Velocityの略)。 催化剂质量流速（Catalyst weight hourly space velocity，WHSV）是指通过反应器内催化剂的质量与反应器进口烃类气体的流量之比。 催化剂质量流速的范围取决于反应器类型、反应条件、反应体系和催化剂所具有的物理化学性质等因素，不同反应过程的催化剂质量流速也 體積空速又可分為兩種情況：如果反應物為氣體，可用氣體空速(Gas hourly space velocity，GHSV)(注意此時氣體體積是標準狀態下的體積)；如果反應物為液體，則可用液時空速(Liquid hourly space velocity，LHSV)。 May 17, 2010 · Abstract. 3 % with a CO selectivity of 0. Feb 1, 2021 · The stability of the catalysts was studied at 750 and 500 °C over 48 h using similar parameters (weight hourly space velocity (WHSV) of 30,000 mL/g catalyst. Under the conditions tested (70–130 °C and 9–15 bar) the reaction rate was affected by mass transfer, given the notable effect of the mixture flow rate and catalyst particle Nov 1, 2014 · The obtained simulation results show that, at low gas hourly space velocity (GHSV = 10,000 h −1), the performances of both reactor technologies are similar. Other combinations of units of the flow rate and reactor size often are used in practice, for instance. 5% when the weight hourly space velocity was 16 g/(g h). 93, 121. When the B/L value decreased, the May 4, 2015 · A computational 2-D model coupled with mass and heat transport and hydrodynamic equations is used to predict how the FT reaction occurs. Apr 15, 2022 · Cu-Zn-Mn catalyst supported on mesoporous silica KIT-6. 3. Since weight of the catalyst charged in to the reactor is not varied and always same, so any variation in flow of liquid per hour will change the WHSV. Thermodynamics studies indicated the DRM process requires a larger amount of energy to operate due to its endothermic nature. 21 K, an exhaust flow rate of 0. A system with a flow rate 2 cu m/h and 1 cu m of catalyst would have an LHSV of 2. The study reveals a three-stage pattern in variation of product concentration along the packing structure height with different WHSVs, providing the basis for 词都网是含有超过500万不重复词条的专业词典，涵盖了基础科学,工业技术,医药卫生,农业,文化历史,社会科学,经济管理,电子技术，信息科学等各个方面，并且不断更新以获取最新的词汇和知识。 Jan 1, 2015 · Alternatively, a weight hourly space velocity (WHSV, h −1) can be defined by dividing the weight of naphtha feed per hour by the total weight of catalyst in the reactors. 86 % (with a reaction temperature of 280 °C, a water-to-alcohol molar ratio of 1. Oct 6, 2014 · it comes from an article on ceria based catalysts. Explanation: Two names from several sources: którą prowadzono w temperaturze 250°C, przy WHSV = 4 h-1, gdzie WHSV (ang. With:-Q m g o u t l e t: mass flowrate of the Jul 1, 2020 · The hydrodeoxygenation (HDO) of phenol catalyzed by Zn/SiO 2 under atmospheric H 2 pressure was investigated in a continuous fixed bed reactor. time on stream; WHSV, weight hourly space velocity. , 2017). GHSV: gas hourly space velocity [m 3 gas/(mcat*h)] Kgs: gas-solid mass transfer coefficient [m/s] L: bed length [m] Lcyl: cylindrical particles length [m] LHSV: liquid hourly space velocity [m3 liq/(m 3 cat*h) ] n: reaction order Q: gas flow rate [m3/s] R: gas constant 8. The effects of several process parameters (zinc load, reaction temperature, weight hourly space velocity (WHSV), and H 2 volumetric flow rate) were evaluated to optimize process conditions. Catalyst WHSV (h −1 ) Mar 1, 2014 · The obtained simulation results show that, at low gas hourly space velocity (GHSV=10000 h−1), the performances of both reactor technologies are similar. 0097 kg·s −1, a steam to methanol ratio of 1. 3 and a weight hourly space velocity of 30 h −1). 重时空速(weight hourly space velocity:which is the mass of aqueous feed solution per mass of catalyst per hour。),即WHSV,又称质量空速。与之对应的还有体积空速。 反应器空速：规定的条件下，单位时间内进入反应器的物料体积相当于几个反应器的容积。简称空速。 质量空速（weight hourly space velocity）是2017年公布的化工名词。 网页 新闻 贴吧 知道 网盘 图片 视频 地图 文库 资讯 采购 百科 百度首页 时间一般以小时为单位，当反应物和催化剂的量以质量为单位时，称为重时空速(Weight hourly space velocity ，WHSV)，而以体积为单位时，称为体积空速。 [3] 体积空速又可分为两种情况：如果反应物为气体，可用气体空速(Gas hourly space velocity，GHSV)；如果反应物为液体 Sep 10, 2014 · As GHSV, gas hourly space velocity is basically the ratio of volumes of feed gas at STP/hr to the volume of the reactor or catalyst. Apr 27, 2020 · A mixture of ethylene and nitrogen gas was fed into the reactor at weight hourly space velocity (WHSV) in the ranges of 0. 5 mmol g cat −1 h −1 (Fig. Feb 18, 2016 · GHSV (gas hourly space velocity) =(volumes of feed as gas at STP/hr)/(volume of the reactor or its content of catalyst) Using bulk density and weight loaded in the reactor you can calculate Dec 18, 2019 · In practice, the interphase diffusion limitation can be overcome by increasing the flow rate in continuous fixed-bed plug flow reactors at constant weight hourly space velocity (WHSV) until the reaction rate becomes a constant (Figure 2 C), 6 because the intrinsic activity should be independent of the flow rate of reactants at a given WHSV 3. 4 mol/L). Similar quantities that are often used in the literature and which express the load on the catalyst are the liquid hourly space velocity (LHSV, Eq. In case of flow rate 100ml/min and catalyst weight 50 mg. Looking for abbreviations of WHSV? It is Weight Hourly Space Velocity. , North Haven, CT 06473. Mass, rather than volume, provides the basis for WHSV. Mar 1, 2003 · WHSV = Weight Hourly Space Velocity He encontrado dos posibles equivalencias: - Velocidad espacial horaria y másica - Velocidad espacia en peso por hora 当反应物和催化剂的量以质量为单位时，称为重时空速（weight hourly space velocity，缩写：whsv）。而以体积为单位时，称为体积空速。 体积空速又可分为两种情况： 如果反应物为气体，可用气体空速；如果反应物为液体，则可用液时空速。 Apr 3, 2021 · Moreover, the temperatures of 375 °C, hydrogen partial pressure (H2/hydrocarbon) of 2. 5 h−1 are the optimum operating conditions for the xylene isomerization process. 2 catalyst was investigated. Jan 10, 2024 · where WHSV is the weight hourly space velocity (30,000 mL g cat −1 h −1), X NH3 is the conversion of NH 3, and V m is the molar volume of gas at 25 °C and 1 atm (24 mL mmol −1). weight hourly space velocity (WHSV) and reactor type. The amount (20. Find the latest published documents for weight hourly space velocity, Related hot topics, top authors, the most cited documents, and related journals Feb 5, 2020 · In the chemical looping hydrogen generation (CLHG) system, methane acts as an important reducing gas, whereas iron oxide has poor reactivity with methane, resulting in the inefficiency of the system. The MSR activities of the reduced catalysts were measured at 200 ℃ and atmospheric pressure, with a methanol weight hourly space velocity (WHSV) of 6 h −1 in a fixed-bed plug flow reactor. 3、时间了 （ 3） 空速 (Space velocity)是指单位时间内通过单位质量 (或体积 )催化剂的反 应物的质量 (或体积 )。时间一般以小时为单位，当反应物和催化剂的量以质量为 单位时，称为重时空速 (Weight hourly space velocity， WHSV)，而以体积为单位 时，称为体积空速。 Many translated example sentences containing "weight hourly space velocity" – French-English dictionary and search engine for French translations. GHSV: Gas Hour Space Velocity,体积空速，就是单位时间内通过单位体积催化剂床层的气体量，单位一般是 h-1. In this expression, ?0 represents the volumetric flow rate of the reactants entering the reactor and V repre … View the full answer Nov 1, 2020 · At 130 °C, 12 bar H 2 and a weight hourly space velocity of the liquid feed (WHSV) of 3. Temperature-programmed desorption (NH 3-TPD) analysis showed the coexistence of weak acidic sites and strong acidic sites in the synthesized catalysts, indicative of weak metal–support interaction. The lowest WHSV at 0. Jun 29, 2021 · Abstract Development of efficient catalysts for ammonia decomposition is crucial for hydrogen production from ammonia. Herein, Ru nanoparticles (NPs) highly dispersed on Pr2O3 (Ru/Pr2O3) were prepared and investigated as catalyst for ammonia decomposition reaction. **GHSV与WHSV的区别** 在化学工程和催化反应领域，气体的空速是一个重要的操作参数。它描述了气体通过催化剂床层的速率，对于理解和优化化学反应过程至关重要。其中，GHSV（Gas Hourly Space Velocity）和WHSV（Weight Hourly Space Velocity）是两种常用的表示方法。 The basis used for these expressions is actual volumetric gas flow rate per hour divided by catalyst volumetric inventory. 而以体积为单位时,称为体积空速. 气体时空速度（Gas Hourly Space Velocity, GHSV）是一个表征催化剂性能的参数，特别是在催化反应中。它定义为单位时间内流过催化剂表面积的体积。这个概念在工业催化剂设计和评价中非常重要，因为它可以帮助我们了解催化剂的反应能力和效率。 Dec 8, 2023 · 当反应物和催化剂的量以质量为单位时，称为重时空速（weight hourly space velocity，缩写：whsv）。而以体积为单位时，称为体积空速。 体积空速又可分为两种情况： 如果反应物为气体，可用气体空速；如果反应物为液体，则可用液时空速。 Sep 15, 2024 · The effect of metal loading, decomposition temperature and weight hourly space velocity (WHSV) on the catalyst activity were studied. 7 wt% yield of liquid hydrocarbons. 0 bar, ∼0. h and a H 2 /CO 2 molar ratio of 4:1). CuZnAl shows a H 2 yield of 95. 0 - 5. 24/04/2008 A: May 1, 2025 · Meanwhile, weight hour space velocity (WHSV) was an important factor in the design of industrial system for VOCs aftertreatment, which might affect the catalytic performance significantly. Reactor Diameter • L/D = ½ to 5 Radial distribution of short beds Wall effects on tall beds • Bed Height Limits Jan 1, 2013 · A parametric study taking into account gas hourly space velocity (GHSV) and methane to oxygen ratio for the oxidative coupling of methane (OCM) is applied. Effects of weight hourly space veloc-ity on reactor performance Weight Hourly Space Velocity (WHSV) is the mass flow rate of the reactants divided by the mass of the catalyst in the reactor. Die Raumgeschwindigkeit ist ein Begriff, der in der technischen Chemie und in der Verfahrenstechnik von Bedeutung ist. 1-6). Nov 11, 2009 · สำหรับกรณีของ Catalytic reactor นั้น จะว่าไปแล้วค่าที่เหมาะสมมากกว่าคือ WHSV ซึ่งย่อมาจาก Weight Hourly Space Velocity ซึ่งค่านี้มีค่าเท่ากับ อัตราการไหล 时，称为重时空速(Weight hourly space velocity ，WHSV)，而以体积为单位时，称为体积空速。 体积空速又可分为两种情况：如果反应物为气体，可用气体空速(Gas hourly space velocity，GHSV)(注意此时气体体积是标准状态下的体 积)；如果反应物为液体，则可用 液时空速(Liquid Oct 1, 2018 · We evaluated the effect of the weight hourly space velocity (WHSV) on oligomerization by adjusting the ethylene flow rate over a constant mass of catalyst. . 91, and 134. 04, for weight hourly space velocity (WHSV) in the range of 1. 当反应物和催化剂的量以质量为单位时，称为重时空速（Weight hourly space velocity，缩写：WHSV）。而以体积为单位时，称为体积空速。 体积空速又可分为两种情况： 如果反应物为气体，可用气体空速；如果反应物为液体，则可用液时空速。 Jul 29, 2022 · The gas hourly space velocity (GHSV) of carrier gas was maintained at 36,000 mL g cat −1 h −1 with WHSV (weight hourly space velocity) of toluene = 2. The effects of the above parameters on the gasoline selectivity in methanol to gasoline conversion (MTG) were studied. WHSV stands for weight hourly space velocity. 51%, for the The reaction was performed in the packed bed microreactor with a fixed length (L bed = 0. 5:1 v/v), with different Gas Hourly Space Velocity (GHSV) through a catalyst bed of 0. 13 (13) W H S V = Q m g o u t l e t m c a t a. the inverse of the weight hourly space velocity (WHSV) for anisole 液时空速（ liquid hourly space velocity———— LHSV）：是空速的一种表示形式，其意义为单位反应体积(对于采用固体催化剂的反应，则为单位体积催化剂)每小时处理液相反应物的体积。如以其他时间单位计算则称液空速。 Jan 1, 2020 · The test was performed by changing the catalyst mass and substrate feed rates keeping the weight hourly space velocity (WHSV) constant. Under relatively high weight hourly space velocity (WHSV = 30,000 mL gcat−1 h−1), the Ru/Pr2O3 achieves a H2 production rate May 1, 2024 · Optimization results demonstrate that the Pareto optimal solution is obtained at an exhaust temperature of 585. It is normally reported for volumes measured at Feb 1, 2015 · Gas hourly space velocity (GHSV) = Volumetric flow rate of reactant or exhaust gas/External volume of catalyst monolith. 账?Space velocity)的定义：单位时间单位催化剂上通过的反应物的量。空速可以分为重时空速和体积空速。 重时空速也称为重量空速，定义为每小时单位质量催化剂上通过的反应物的质量，WHSV是Weight Hourly Space velocity的缩写。 Nov 2, 2022 · Weight hourly space velocity (WHSV) is defined as the weight of feed flowing per unit weight of the catalyst per hour. 15–0. Q: A: What is the meaning of WHSV abbreviation? The meaning of WHSV abbreviation is "Weight Hourly Space Velocity". The effect of temperature in the range 220–300 °C was assessed at 2. 615) divided by 24 hours per stream day. Jan 15, 2022 · An integrated soft computing approach was also used to model and optimize the ethanol dehydration conditions. Gaseous and liquid products were separated and depressurized to Influence of weight hourly space velocity (WHSV) Table 6 reveals the influence of WHSV on reactant conversion and the H 2 /CO ratio in the DRM process with Ni–Ce@SiO 2 catalyst at CO 2 :CH 4 feed ratios of 50:50 and 70:30 at 700 °C. (4)) was varied by adjusting the total flow rate (Q Mostly this is expressed on weight basis then it is called weight hourly space velocity (WHSV) that is calculated by weight of liquid flow per unit weight of the catalyst per hour. May 21, 2024 · Weight hourly space velocity (WHSV) differs from LHSV and GHSV, because volume is not utilized. The results revealed that, when the catalyst packing temperature increased from 823 to 923 K, the conversion rose by 104. The GHSV and methane to oxygen ratio are shown to effect the methane conversion and selectivity towards ethane and ethylene. Therefore, in-depth understanding the of parametric study over DRM is crucial. The combination of space velocity and reactor temperature is used to adjust the conversion of the naphtha feed in order to achieve the target product octane or aromatic yield. , weight hourly space velocity (WHSV), dehydration temperature, and dehydration pressure, were thoroughly analyzed on the exergy, exergoeconomic, and exergoenvironmental indicators. WHSV代表每小时重量流速。 WHSV - Weight Hourly Space Velocity. Jul 10, 2022 · conditions of 450 °C and a liquid weight hourly space velocity (WHSV) of 5 h−1. De très nombreux exemples de phrases traduites contenant "weight hourly space velocity" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Weight Hourly Space velocity (chemistry) WHSV-TV , a television station (channel 20, virtual 3) licensed to serve Harrisonburg, Virginia, United States Topics referred to by the same term 账?Space velocity)的定义：单位时间单位催化剂上通过的反应物的量。空速可以分为重时空速和体积空速。 重时空速也称为重量空速，定义为每小时单位质量催化剂上通过的反应物的质量，WHSV是Weight Hourly Space velocity的缩写。 （3）空速(Space velocity)是指单位时间内通过单位质量(或体积)催化剂的反 应物的质量(或体积)。时间一般以小时为单位，当反应物和催化剂的量以质量为 单位时，称为重时空速(Weight hourly space velocity，WHSV)，而以体积为单位 时，称为体积空速。 Aug 1, 2021 · The Weight Hourly Space Velocity of each test was calculated with Eq. WHSV:Weight Hour Space Velocity，质量空速，就是单位时间内通过单位质量催化剂床层的气体量，单位一般是 ml/h-1 gcat-1， Sep 22, 2012 · In Weight Hour Space Velocity= volumetric flow rate (or feed flow rate)/ mass of the catalyst. 5 mm -Al 2 O 3 pellets as dehydration catalyst and operated in a temperature range of 543 603 K at an atmospheric pressure. 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