化工进展2023，Vol.42Issue(11)：6086-6092,7.DOI:10.16085/j.issn.1000-6613.2022-2386
电石炉净化灰矿化模拟烟气中CO2特性分析
Characteristic analysis on CO2 mineralization by purified dusts from calcium carbide furnace
摘要
Abstract
A lot of alkaline-rich ash and slag wastes which are produced from calcium carbide production has the potential to capture and then mineralize CO2.In this paper,the purified dust removed from the flue gas of a calcium carbide furnace was viewed as the research object and the deionized water was used as leaching agent.The influences of the mineralized reaction temperature,the volume fraction of CO2,the liquid-to-solid ratio on the pH of the leaching solution from purified dust during CO2 absorption process and the mineralization efficiency were studied.At the same time the reaction difference between direct mineralization and indirect mineralization was compared.The experimental results showed that the initial pH of mother liquor leached by deionized water from purified dust was about 12.7.The CO2 mineralized product of purified dust was calcite with nanoscale diameter at 25℃ .Enhancing the reaction temperature could shorten the required time for mineralization reaction.Meanwhile,it also promoted the formation of flower-shaped aragonite CaCO3 and its particle grew in size.The mineralization reaction time became shorten through reducing the liquid-to-solid ratio and increased the volume fraction of CO2.The efficiency for direct mineralization was close to about 60% ,which was greatly higher than indirect mineralization efficiency.But the reaction time required for direct CO2 mineralization was much longer than that for indirect CO2 mineralization.关键词
矿化/二氧化碳/净化灰/电石/浸取Key words
mineralization/CO2/purified dusts/calcium carbide/leaching分类
化学化工引用本文复制引用
王毅斌,马佳慧,林翅,冯敬武,谭厚章,贺力海,杨建伟..电石炉净化灰矿化模拟烟气中CO2特性分析[J].化工进展,2023,42(11):6086-6092,7.基金项目
国家自然科学基金(51906198,51876162). （51906198,51876162）
