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

摘要：

无机金属碳酸盐是一类具有高附价值和地球储量丰富的矿物质资源，且碳酸盐热分解是制备金属氧化物的主要途径。但是，该类反应通常需要在高温、氧气气氛下焙烧获得，从而造成大量二氧化碳排放，与其相关的碳排放总量超过了全国工业碳排放的50%。为了解决这一问题，无机金属碳酸盐加氢热分解逐渐引起关注。本文首先介绍了碳酸盐加氢热分解的研究进展，进一步结合本文作者课题组近期关于电解水制氢和碳酸盐加氢还原的最新成果，提出电解水制氢耦合碳酸盐还原的观点，其有望成为制备金属氧化物的新型技术路线，对我国重排放过程工业的减排增效具有借鉴意义。

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