添加剂抑制CaSO_4高温分解的TG-FTIR研究 (Ⅱ)碳酸盐系列  

STUDY ON THE CONSTRAINT OF ADDITIVES ON THE THERMAL DECOMPOSITION OF CaSO_4 AT HIGH-TEMPERATURE BY TG-FTIR PART(Ⅱ) CARBONATE SERIES

作　　者：杨晓东[1] 武建军[1] 薛可轶[1] 沈吉敏[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州硕士生221008

出　　处：《煤炭转化》2004年第1期46-48,共3页Coal Conversion

基　　金：中国矿业大学科技基金资助项目 ( OH90 49)

摘　　要：如何提高固硫产物 Ca SO4高温的热稳定性 ,从而提高以钙基固硫剂为主固硫剂的高温固硫率 ,成为燃中固硫的关键问题 .采用 TG- FTIR联用技术 ,在线测定了各种碳酸盐添加剂对固硫产物 Ca SO4在高温下 ( 1 0 0 0℃～ 1 45 0℃ )热稳定性的影响规律 .结果表明 ,添加一定比例的Na2 CO3 ,Ba CO3 ,Sr CO3 和 Mg CO3 对固硫产物 Ca SO4晶体在高温下的分解有明显的抑制作用 .How to improve the stability of the desulfurization products,and improve the desulfurization efficiency of calcium-based sorbents at high temperature,which is the key problem of desulrurization during the combustion.The paper used the combination technology of TG and FTIR,and measured the influence rules of carbonate additives on the thermal decomposition of CaSO 4 in series at high temperature(1 000 ℃-1 450 ℃).The results shows that addition of certain proportion Na 2CO 3,BaCO 3,SrCO 3 and MgCO 3 to the pure CaSO 4,which will constrain the decomposition of CaSO 4 obviously at high temperature(1 000 ℃-1 450 ℃).

关 键 词：添加剂 CASO4 高温分解 TG-FTIR 碳酸盐 高温固硫 硫酸钙 固硫剂 燃煤污染 

分 类 号：X701.3[环境科学与工程—环境工程]