如图展示的催化加氢合成乙醇的流程中,首先,CO2在特定催化剂作用下发生逆水煤气变换(Reverse Water Gas Shift reaction,简称 RWGS,该反应是水煤气变换反应的逆向反应,即由二氧化碳和氢气相互作用,生成一氧化碳和水)反应生成一氧化碳(CO)。在这一步骤中,CO2分子中的碳氧双键(C=O)被活化,氢气解离后的氢原子与CO2作用...
Various transient isotopic methods have been used to study the CO/H2 reaction over 2.5 wt% Rh/MgO catalyst at temperatures in the range 493–573 K. The steady-state tracing method permits the determination of the surface coverage of CO and that of the very active carbon Cα. The results ...
The CO–H2 Reaction over ZrO2 to Form Isobutene Selectively The CO–H2 reaction over ZrO2 was studied in detail. Methanol and isobutene were selectively formed at 473–523 and 623–673 K, respe... Ken-ichi,Maruya,Tatsuichi,... - 《Bulletin of the Chemical Society of Japan》 被引量: 19...
The effects of oxygen pretreatment on the activity and selectivity of CO–H2 reaction over sodium-doped and none-doped palladium catalysts supported on TiO2 and ZrO2 have been investigated. Large enhancement effect of methanol and C2 hydrocarbon product formations was observed after the oxygen treatment...
随着制氢技术的发展,气基直接还原竖炉使用绿色H2作为还原剂进行生产变得可行。在诸多非高炉炼铁技术中,富氢直接还原竖炉工艺有望解决传统高炉长流程工艺CO2排放高的问题。但富氢直接还原竖炉面临的共性问题是还原煤气中H2体积分数过高时还原吸热导致炉内热量不足,从而影响煤气利用率和金属化率。如何调整还原煤气φ(CO)∶...
Fig.1. CO conversion and product distribution as a function of the Cr/Zn(n) molar ratio over ZnCrn-SAPO-18 composite catalysts.Reaction conditions: 400 °C, 4.0 MPa, GHSV = 3000 mL/(gcat·h), H2/CO = 2.5, ...
Moreover, considering the interest of reduced cobalt catalysts for the CO/H2 reaction we have studied the impact of the presence of hydrogen on the different heats of adsorption as a contribution to an experimental microkinetic approach of this reaction....
96.30kJ/too1.Andthereaction(2)was115.99kJ/toolbyusingB3LYP/6—311++G(d,p),withtheexperimental value141.51kJ/molonlydiffers25.52kJ/too1.Theresultsshowedthatboththereactionsweretheexotherma1. Keywords:DFT;MP2;CO;HO2;NO2;energybarriers(责任编辑,校对李琼)Office...
based catalysts on CO2 hydrogenation to ethanol and comparison of TOF in this work with the reported literature. (f) Recycling experiment over RhFeOx/P25 under the optimum reaction conditions, 220 °C, 5.0 MPa (initial pressure), H2/CO2 = 3, 30 mg catalyst, 20 mL H2O, 5 h, 600 rpm....
CH3CCH - + + H2O - + = CO - + + H2 - + ReactantsProducts C 3 1 ❌ H 6 2 ❌ O 1 1 ✔️ Hint: The sum of the balanced coefficients is 12. See Step-By-Step SolutionCalculators Equations & Reactions Chemical Equation Balancer Reaction Stoichiometry Calculator Limiting Reagent...