关键词: 碳酸盐, 热分解, 二氧化碳, 加氢, 制氢, 耦合反应, 减排增效, 碳中和

Abstract:

Inorganic metallic carbonate is a kind of mineral resources with high supplementary value and abundant reserves on earth. The thermal decomposition of carbonate is the main way to prepare metal oxides. However, it usually requires roasting under high temperature and oxygen atmosphere, resulting in a large amount of carbon dioxide emissions. In addition, the total carbon emissions related to it exceed 50% of the national industrial carbon emissions. In order to resolve this problem, the thermal decomposition of inorganic metallic carbonate via hydrogenation reduction attract gradually much attention. This paper firstly introduces the research progress of the thermal composition of carbonate via hydrogenation reduction, combined with the latest results of hydrogen generation from electrochemical water splitting and carbonate reduction in our research group. A new technology model perspective of electrochemical water splitting coupling carbonate reduction is put forward, which can become a new technology route to prepare metal oxides. It is the significant reference for greatly reducing carbon emission and improve efficiency of heavy emission process industries.

Key words: carbonates, thermal decomposition, carbon dioxide, hydrogenation, hydrogen generation, coupling reaction, emission reduction and improve efficiency, carbon neutrality