钙基固体废弃物湿法捕获二氧化碳的反应特性  

The reactivity of carbon dioxide capture with calcium-based waste solid by wet process

作　　者：伊元荣[1,2] 韩敏芳[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]新疆大学资源与环境科学学院,新疆乌鲁木齐830046

出　　处：《煤炭学报》2012年第7期1205-1210,共6页Journal of China Coal Society

基　　金：高等学校学科创新引智计划资助项目(B08010);中央高校基本科研业务费资助项目(2010YH02);北京市清洁能源学重点学科资助项目

摘　　要：以钢厂排出的废钢渣粉渣为碳捕获剂,研究不同比例的钢渣浆液对CO2的捕获效果、碳捕获过程、pH值变化及热力学计算,并通过XRD,TG-DTA,BET,SEM,FT-IR等方法对碳捕获前后的物料特性进行表征分析。XRD和SEM分析结果表明,钢渣粉渣中的碱性物质与CO2发生反应,碳捕获后固相中多处出现CaCO3且含量显著增加,比表面积也大幅度增加。TG-DTA和FT-IR分析进一步证实碳捕获后由于CaCO3的增加使废钢渣内部的物理化学和微观结构发生了很大变化。Steel slag, a kind of alkaline industrial waste from smelting, can be used as CO2 capture agent. Ground steel slag was applied in carbon capture. The effect of steel slag proportion in slurry on the efficiency of carbon capture, the change of slurry pH and the results of thermodynamic calculation were studied. XRD, TG-DTA, BET and FT-IR were used to characterize the lag before and after carbon capturing. The results of XRD and SEM show the content of CaCO3and specific surface area increase after carbon capturing, which indicate that alkaline substance reacts with CO2. The results of TG-DTA and FT-IR analysis prove that the physicochemical properties and microscopic structure of the slag mixture change because of increasing of CaCO3 content.

关 键 词：钙基固体废弃物 湿法 CO2捕获 

分 类 号：X511[环境科学与工程—环境工程]