Synthesis of grid compliant substitute natural gas from a representative biogas mixture in a hybrid Ni/Ru catalysed reactor

被引：10

作者：

Moioli E. ^{[1
,2
]}

Mutschler R. ^{[1
,2
]}

Borsay A. ^{[1
,2
]}

Calizzi M. ^{[1
,2
]}

Züttel A. ^{[1
,2
]}

机构：

[1] Laboratory of Materials for Renewable Energy (LMER), Institute of Chemical Sciences and Engineering (ISIC), Basic Science Faculty (SB), École Polytechnique Fédérale de Lausanne (EPFL) Valais/Wallis, Energypolis, Sion

[2] Empa Materials Science & Technology, Dübendorf

来源：

Chemical Engineering Science: X | 2020年 / 8卷

关键词：

Biogas upgrading; CO[!sub]2[!/sub] methanation; Multistep reactor; Optimal temperature profile;

D O I：

10.1016/j.cesx.2020.100078

中图分类号：

学科分类号：

摘要：

We demonstrate biogas upgrading towards full CO2 conversion in mild conditions in a three-step reactor system using Ru- and Ni-based catalysts. In each of the three reactor stages, the temperature is carefully controlled, thus optimizing the reaction thermodynamics and kinetics, resulting in a maximized global CO2 conversion. At ambient pressure, 92% conversion can be achieved over a commercial Ru/Al2O3 catalyst at a space velocity of 2 L/h/gcat in every stage. At 2 bar conversion is enhanced to above 99%. It is possible to substitute the Ru-based catalyst in the first stage with a cheaper Ni-based catalyst, shifting the first-stage temperature to higher values forming also CO. CO has a positive effect on the following step since CO is converted to CH4 in the CO methanation reaction. In this way, it is possible to achieve the same final conversion compared to the Ru-operated reactor system using Ni in the first reactor stage. © 2020 The Author(s)

引用

共 30 条

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