Using the analytical heirarchy process to select specific methanation catalysts based on their extraction impacts,International Journal of Energy Research

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Using the analytical heirarchy process to select specific methanation catalysts based on their extraction impacts
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-11-12 , DOI: 10.1002/er.6203
Gerald Duck ₁ , Yue Yu ₂ , David S. A. Simakov ₂ , Sean B. Walker ₁

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Methanation is an exothermic process that utilizes catalysts to convert the carbon dioxide and carbon monoxide in biogas to methane, forming synthetic natural gas. The criteria for determining a suitable catalyst should not only be its effectiveness, but also the environmental impact of extracting and refining the metal. The authors examine the environmental impacts of implementing a select group of methanation catalysts in the field for industrial scale synthetic natural gas production using the analytical hierarchy process (AHP). Catalysts containing a combination of rare earth metals are investigated separately and AHP is used to rank the catalysts based on their environmental impact per kg of CO₂ converted. It is determined that catalysts containing common metals, such as nickel, have the lowest environmental impact per conversion rate across a number of metrics and represented the catalysts with the second and third highest conversion rates analyzed. Catalysts containing ruthenium are found to be the most detrimental to the environment, in spite of the favorable conversion rate offered by a ruthenium‐cesium catalyst in methanation reactors.

中文翻译：

使用层次分析法根据萃取影响选择特定的甲烷化催化剂

甲烷化是一种放热过程，利用催化剂将沼气中的二氧化碳和一氧化碳转化为甲烷，形成合成天然气。确定合适催化剂的标准不仅应是其有效性，而且还应包括提取和精炼金属对环境的影响。作者研究了使用层次分析法（AHP）在工业规模的合成天然气生产领域中实施精选的甲烷化催化剂对环境的影响。单独研究了包含稀土金属组合的催化剂，并使用AHP根据每千克CO ₂对环境的影响来对催化剂进行排名转换。可以确定，在许多指标上，含普通金属（如镍）的催化剂的单位转化率对环境的影响最低，并且代表所分析的第二和第三高转化率的催化剂。尽管钌-铯催化剂在甲烷化反应器中提供了有利的转化率，但发现含钌的催化剂对环境最不利。

更新日期：2020-11-12

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