二氧化碳碳化技术研究进展

A Review of Research into CO_2 Carbonation Technology

二氧化碳碳化技术是碳隔离研究的重要部分,碳隔离包括矿物碳化、混凝土碳化、MgO水泥碳化及活性MgO固化土碳化.讨论碳化进程的影响因素、混凝土碳化模型及其碳化程度的评价方法等,分析MgO水泥和活性MgO固化土碳化效果等新的技术问题.研究表明:二氧化碳碳化机理主要为碱性氧化物与二氧化碳间发生的化学反应,生成稳定的碳酸盐;影响碳化的因素包括内在因素和外在因素;物理法、化学法和X射线法用于碳化后评价.对二氧化碳碳化技术研究进行了展望.

Carbonation technology of carbon dioxide plays a key role in the study of carbon sequestration, which includes mineral carbonation, concrete carbonation, carbonation of MgO-bearing cement and carbonation of reactive MgO-stabilized soil. This paper discusses the factors affecting carbonation, carbonation model of concrete and evaluation method of carbonation. It also studies the issues relating to carbonation effects of MgO-bearing cement and reactive MgO stabilized soil. The results indicate that the carbonation results from the stable carbonate due to the chemistry reaction between alkaline oxides and carbon dioxide, and that contributing factors involve internal and external ones. Besides, some methods are used in the post-carbonation evaluation including physical method, chemistry method and X-ray method. Finally, the future research trend in carbonation technology of carbon dioxide is prospected.