CO 2 Capture and Direct Air CO 2 Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al 2 O 3 Catalyst
CO 2 Capture and Direct Air CO 2 Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al 2 O 3 Catalyst
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CO 2 捕获和直接空气 CO 2 捕获，然后在金属氢氧化物和 Ru/Al 2 O 3 催化剂的辅助下集成转化为甲烷
DOI：
10.1002/cctc.202300877
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发表时间：
2023
期刊：
影响因子：
4.5
通讯作者：
Prakash, G. K. Surya
中科院分区：
文献类型：
--
作者：
Koch, Christopher J.;Suhail, Zohaib;Goeppert, Alain;Prakash, G. K. Surya
二氧化碳水平的上升导致大气温室气体效应的增加。氢氧化物盐先前已被证明是用于捕获CO2的有前景的试剂。利用5%Ru/Al 2 O3催化剂，通过CO2捕获获得的碳酸盐然后可以加氢为甲烷。该转化在相对温和的温度（200 °C至250 °C）下在40至70巴H2下发生，产率高达100%。 天然碳酸钙来源，如蛋壳和贝壳，也可以部分转化为甲烷。直接空气CO2捕集和CO2转化为甲烷也实现了定量产率。
Rising CO2levels are leading to an increase in atmospheric greenhouse gas effect. Hydroxide salts have previously been shown to be promising reagents for capturing CO2. Utilizing a 5 %Ru/Al2O3catalyst, the carbonates obtained through CO2capture can then be hydrogenated to methane. This conversion occurs at relatively mild temperatures from 200 °C to 250 °C under 40 to 70 bar H2with yields of up to 100 %. Natural sources of calcium carbonate, like eggshells and seashells, can also be partially converted to methane. The direct air CO2capture and conversion of CO2to methane was achieved as well in quantitative yields.