电厂脱硫石膏与烟气协同合成微纳米材料的研究  

Experimental research on synergistic synthesis of micro-nano materials from desulfurization gypsum and flue gas in power plants

作　　者：王志远 苏现波[1,2,3] 赵伟仲 汪露飞 WANG Zhi-yuan;SU Xian-bo;ZHAO Wei-zhong;WANG Lu-fei(Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,China;Unconventional Natural Gas Research Institute,Henan Polytechnic University,Jiaozuo 454000,China;Henan Fusi Feier Technology Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]河南理工大学非常规天然气研究院,河南焦作454000 [3]河南省福斯菲尔科技有限公司,河南郑州450000

出　　处：《现代化工》2025年第2期84-89,共6页Modern Chemical Industry

基　　金：国家自然科学基金重点资助项目(42230804);国家自然科学基金面上资助项目(42072193);河南省重点研发专项项目(231111320600)。

摘　　要：以鹤壁某燃用高硫煤电厂产生的脱硫石膏为原料,通过氯化铵盐溶液溶解脱硫石膏,在石膏浸出滤液中加入氨水,通入模拟电厂烟气制备微纳米CaCO_(3)。在提取过Ca^(2+)的滤液中加入金属氯化物与SO_(4)^(2-)结合,形成微纳米XSO_(4)沉淀。实验结束后,残余液体仍然为氯化铵溶液,且可循环用于下一次浸出。利用XRD和SEM对样品进行测试。结果表明,制备的碳酸钙是球霰石和方解石的混合晶体,晶粒尺寸为微纳米级,纯度近100%;制得的XSO_(4)晶粒尺寸亦为微纳米级,纯度近100%。通过计算,理论上每吨脱硫石膏可以固定135 kg CO_(2),产生307 kg微纳米碳酸钙,制备718 kg微纳米硫酸盐。该研究为电厂烟气不经捕集而直接利用提供了新途径,将减少高额的CO_(2)捕集费用,为脱硫石膏的资源化利用和碳减排提供一种可商业化运行的途径。Using desulfurization gypsum produced in a high-sulfur coal power plant in Hebi,Henan,China as raw material,it is dissolved in an ammonium chloride salt solution.Subsequently,ammonia water is added into the gypsum leachate where the simulated flue gas from the power plant is feed in to prepare micro-nano CaCO_(3).In the filtrate from which Ca^(2+)has been extracted,metal chlorides are added to react with SO_(4)^(2-),resulting in the formation of micro-nano XSO_(4)precipitate.At the conclusion of the experiment,the residual liquid remains as an ammonium chloride solution,which can be recycled for the next leaching process.XRD and SEM are employed to analyze the samples.It is indicated that the prepared calcium carbonate is a mixed crystal between aragonite and calcite,with micro-nano of grain sizes and a purity approaching 100%.The obtained XSO_(4)also exhibits micro-nano grain sizes and a purity nearing 100%.Calculation suggests that theoretically,each ton of desulfurization gypsum can sequester 135 kg of CO_(2),yield 307 kg of micro-nano calcium carbonate and produce 718 kg of micro-nano sulfate.This research provides a novel approach for the direct utilization of power plant flue gas without capture,which will significantly reduce the high cost associated with CO_(2)capture.It offers a commercially viable pathway for the re-utilization of desulfurization gypsum and carbon dioxide emission reduction.

关 键 词：脱硫石膏 盐浸 CO_(2) 微纳米CaCO_(3) 微纳米XSO4 

分 类 号：TQ132[化学工程—无机化工]