4.7 Article

Co-thermal in-situ reduction of inorganic carbonates to reduce carbon-dioxide emission

期刊

SCIENCE CHINA-CHEMISTRY
卷 66, 期 4, 页码 1201-1210

出版社

SCIENCE PRESS
DOI: 10.1007/s11426-022-1537-6

关键词

inorganic carbonate; co-thermal; in-situ reduction; carbon dioxide emission reduction; carbon monoxide

向作者/读者索取更多资源

The co-thermal in-situ reduction of inorganic carbonates using the energy released by carbonate decomposition under a pure hydrogen atmosphere reduces the decarboxylation temperature and inhibits CO2 emissions. This study reveals the potential of green hydrogen technology for the valorization of inorganic carbonates, which can facilitate large-scale industrial applications.
Thermal decomposition of inorganic metal carbonates is the main path to prepare metal oxides; nonetheless, it is always accompanied by the emission of large amounts of CO2 as one of the gas products. This study reports a concept of co-thermal in-situ reduction of inorganic carbonates by using the energy released by carbonate decomposition under pure hydrogen atmosphere, which reduces the decarboxylation temperature and significantly inhibits the CO2 emissions. A combination of hydrogen-deuterium exchange, isotope experiment, and density functional theory calculations demonstrates that the CO results from the selective cleavage of Ca-O bonds at the surface of CaCO(3)via the direct hydrogenation mechanism at relatively low temperature. However, it undergoes the reverse water-gas shift reaction path at high temperature, i.e., CO being produced by the reduction of CO2 released by the decomposition of carbonates. This study sheds light on the potential of green hydrogen technology for inorganic carbonate valorization toward high value-added products, which can facilitate the large-scale industrial applications.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据