CO_(2)矿物封存技术研究进展  

Research progress in CO_(2) mineral sequestration technology

作　　者：何民宇 刘维燥 刘清才[1] 秦治峰 HE Minyu;LIU Weizao;LIU Qingcai;QIN Zhifeng(College of Materials Science and Engineering,Chongqing University,Chongqing 400044,Sichuan,China;School of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]重庆大学材料科学与工程学院,四川重庆400044 [2]四川大学化学工程学院,四川成都610065

出　　处：《化工进展》2022年第4期1825-1833,共9页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2016YFB0600904);中国博士后科学基金(2020TQ0392,2021M693745)。

摘　　要：CO_(2)捕集与封存技术是目前实现碳减排最有效的方法。其中CO_(2)矿物封存(又称CO_(2)矿化)是利用CO_(2)与含钙镁硅酸盐矿物进行反应使CO_(2)以稳定的碳酸盐形式永久储存起来。本文首先介绍了CO_(2)矿化的基本原理和技术路线,其中间接矿化反应条件较温和、矿化效率更高、得到的产物也更纯,因此对于CO_(2)间接矿化的研究也更广泛。本文综述并对比了天然矿物及工业固废矿化CO_(2)的研究进展,指出工业固废更有利于CO_(2)矿化过程。工业固废矿化CO_(2)过程矿化CO_(2)的同时处理了工业固废,实现以废治废,因此它在经济上也是具有一定优势。在此基础上,本文以高炉渣为代表,介绍了其矿化CO_(2)的详细研究进展,指出采用可循环的助剂、回收高炉渣中有价元素可提升矿化过程经济性。对于CO_(2)矿化过程的放大试验、生命周期的评估及低能耗的新工艺开发将是CO_(2)矿物封存实现工业化的关键。At present,CO_(2) capture and storage technology is the most effective way to achieve CO_(2) emission reduction.Wherein,CO_(2) mineral sequestration mainly utilizes the reactions of carbon dioxide with calcium and magnesium silicate minerals to form stable carbonates,and thus can permanently store CO_(2).The principles and pathways for CO_(2) mineral carbonation are briefly introduced in this paper.Indirect carbonation receives more attentions due to the moderate reaction condition,higher mineralization efficiency and possibility for recovering valuable byproducts.This paper reviews and compares the carbonation process by using natural minerals and industrial solid wastes as feedstock.It is found that the latter is more conducive to the CO_(2) mineralization process.This process realizes the disposal of industrial solid wastes while storing CO_(2),realizing the treatment of waste with waste,which had certain advantages in economy.Based on above,this paper takes blast furnace slag as representative and summarized its research progress in CO_(2)mineral carbonation.It is pointed out that using recyclable reagents and recovering valuable elements from blast furnace slag can improve the economy of CO_(2) mineralization.To realize the industrial application of theCO_(2)mineralization technology,the scale-up experiments,life cycle assessment and developments of new approaches with low energy consumption should be paid more attentions to.

关 键 词：CO_(2)矿物封存 工业固废 碳酸化 硫酸铵 高炉渣 

分 类 号：TQ53[化学工程—煤化学工程]