化工进展2024，Vol.43Issue(4)：2161-2173,13.DOI:10.16085/j.issn.1000-6613.2023-0660
改性镁渣的湿法碳酸化工艺
Technique of wet carbonation of modified magnesium slag
摘要
Abstract
Carbonation reaction of alkali-based industrial solid waste is one of the carbon sequestration strategies for mineralization to absorb CO2 and reduce greenhouse gas emissions.In this study,the wet carbonation process was introduced for the first time,and through experimental tests using XRD,FTIR and TG-DTG,it was focused on exploring the effects of temperature change,stirring speed,carbonation time and liquid-solid ratio on the carbonation reaction of modified magnesium slag,and then discussed the carbonation products and carbon sequestration efficiency of modified magnesium slag under the four factors.The results showed that the mineral composition of modified magnesium slag was mainly dominated by β-C2S,which was an industrial solid waste with good CO2 storage capacity,and the carbonation products were mainly dominated by calcite-type calcium carbonate crystals and silica gel.After the carbonation reaction,the particle size of the modified magnesium slag carbonation product increased significantly,the specific surface area decreased,the particle size distribution became more uniform and the particle size distribution range became narrower.When the carbonation reaction temperature was 60℃,the aeration time was 30min,the liquid-solid ratio was 10mL/g and the stirring speed was 600r/min,the carbon sequestration efficiency of modified magnesium slag reached the maximum(28.4％),i.e.1kg of modified magnesium slag could be mineralized to absorb 0.284kg of CO2.Therefore,the wet carbonation process had a great application for the recycling of modified magnesium slag and the carbon dioxide sequestration potential.关键词
二氧化碳捕集/多相反应/废物处理/湿法碳酸化/固碳效率Key words
CO2 capture/multiphase reaction/waste treatment/wet carbonation/sequestration efficiency分类
资源环境引用本文复制引用
孙伟吉,刘浪,方治余,朱梦博,解耿,何伟,高宇恒..改性镁渣的湿法碳酸化工艺[J].化工进展,2024,43(4):2161-2173,13.基金项目
陕西省重点研发计划——"两链"融合重点专项(2023-LL-QY-07) （2023-LL-QY-07）
国家自然科学基金面上项目(52222404,52074212) （52222404,52074212）
国家自然科学基金青年基金(52204175,52004206). （52204175,52004206）
