加压惰性气氛下CaO和SO_2反应的热重研究  

Thermogravimetric Research on Reaction of CaO with SO_2 in Inert Atmosphere Under Pressure

作　　者：李文[1] 韩翔宇[1] 陈皓侃[1] 李保庆[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《中国矿业大学学报》2002年第4期363-366,共4页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展规划项目 (G19990 2 2 10 2 )

摘　　要：在加压及惰性气氛下用热重法研究了不同来源的 Ca O和 SO2 的反应性 .结果表明 :固硫剂的种类、颗粒大小及气体反应物的浓度对 Ca O固硫转化率有一定影响 .所选用的 3种固硫剂的固硫能力从大到小为 Ca( AC) 2 ,Ca( OH) 2 ,Ca CO3 ;Ca O转化率随其颗粒的减小而增加 ,随 SO2浓度的增加而增加 ;压力相同时 ,温度升高 ,反应速率和转化率增加 ,Ca O固硫反应最佳温度为85 0℃左右 .温度相同 ,随着压力增加 ,Ca O转化率显著增加 ;在惰性气氛下 ,Ca O和 SO2 反应的直接产物是 Ca SO3 而不是 Ca SO4;The reaction of CaO from different sources with SO2 was studied using TG technique in inert atmosphere under pressure and inert atmosphere. The results show that the type, particle size of sulfur-fixing agents and the concentration of SO2 have an effect on the conversion of CaO. The sulfur-fixing ability of different reagents is in the following order: Ca (AC)2, Ca(OH)2, CaCO3. The conversion of CaO increases with the decrease of particle size and the increase of concentration of SO2. Under the same pressure the reaction rate and conversion increase with the temperature rising. The optimum sulfur-fixing temperature is 850°C. At same temperature the conversion of CaO increase significantly with the increase of pressure. Under inert atmosphere the direct product of CaO with SO2 is CaSO3, but not CaSO4, which is resulted from disproportional reaction of CaSO3.

关 键 词：热重 CAO SO2 加压 惰性气氛 氧化钙 二氧化硫 固硫剂 

分 类 号：TQ536[化学工程—煤化学工程]