粉煤灰吸附二氧化碳在节能减排领域的应用

POTENTIAL INDUSTRIAL APPLICATION OF ADSORPTION OF CARBON DIOXIDE BY COAL ASHES

分析了粉煤灰吸收二氧化碳的反应原理,综述了粉煤灰作为二氧化碳吸收剂的研究历程及在节能减排中的应用现状.粉煤灰中吸收二氧化碳的有效成分(氧化钙和氧化镁)含量很低,粉煤灰单纯地作为二氧化碳吸附剂的效率相应较也低,减排的效率低.但利用二氧化碳与粉煤灰的反应,将粉煤灰转变为工业化产品,是一个资源化利用粉煤灰的好方法.

This article described the development of research in this field, analyzed the mechanism of the reaction, and discussed the possibility of applying coal ashes as a tool to reduce carbon dioxide emission in China through analysis and calculation using the data from the coal mines in Ordos of Inner Mongolian and Datong of Shanxi Province. That the total amount of cal- cium oxide and magnesium oxide, both of which are the active constituents in coal ashes to react with carbon dioxide, is very low in the coal ashes, and as a result, the effect of coal ashes in ＂absorbing＂ carbon dioxide is quite limited. Therefore, the coal ashes can not serve as an efficient carbon dioxide absorbent that leads to dramatic reduction of carbon dioxide. However, the reaction with carbon dioxide could effectively turn coal ashes into key intergradient of some important industrial products, such as sulfide absorbents and cements, to serve in the purpose of waste re- cycling.