CO2/CO methanation over Ru and Ni supported γ-Al2O3: A study on the effect of the stoichiometry of reactant gases

被引：9

作者：

Jabotra, Ganesh ^{[1
]}

Yadav, Pradeep Kumar ^{[1
]}

Kumar, Siddharth ^{[1
]}

Sharma, Sudhanshu ^{[1
]}

机构：

[1] Indian Inst Technol Gandhinagar, Discipline Chem, Gandhinagar 382355, India

来源：

MOLECULAR CATALYSIS | 2023年 / 547卷

关键词：

CO2; CO methanation; Stoichiometry; Synthetic natural gas (SNG); Biomass; Water-gas shift; Sabatier reaction; Boudourad reaction; stability; Conversion; Gas hourly space velocity (GHSV); CARBON-DIOXIDE METHANATION; LOW-TEMPERATURE; HYDROGEN-PRODUCTION; CATALYSTS; NANOPARTICLES; OPERANDO; MECHANISMS; PYROLYSIS; METHANOL; INSIGHT;

D O I：

10.1016/j.mcat.2023.113365

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CO2 and CO conversion to methane serves as a dual process as it helps in the depletion of CO and CO2 released in the atmosphere due to anthropogenic reasons and gives us by-products of high calorific value. Herein, we have studied the CO2 and CO methanation reaction at different stoichiometry using two supported catalysts: Ru/ & gamma;-Al2O3 and Ni/& gamma;-Al2O3. The catalysts are prepared using hydrazine reduction, and the methanation reaction is tested using temperature-programmed reactions by varying the stoichiometric moles of hydrogen to study the effect on conversion and methane selectivity. Stoichiometry effect is important to study in cases where hydrogen is present in lesser quantities than the stoichiometry. In addition, the long-term stability is also studied for both catalysts for 40 hours and spent catalysts were characterized by the Thermogravimetric analysis (TGA), O2 Temperature programmed oxidation (O2-TPO) and X-ray photoelectron spectroscopy (XPS).

引用

页数：13

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