添加PEG对钙基烟气脱硫剂结构和性能的影响  

STUDY ON MODIFICATION OF STRUCTURE AND PROPERTY OF CALCIUM-BASED FGD SORBENT WITH PEG

作　　者：陈建华[1] 陈文华[1,2] 赵俊峰[2] 

机构地区：[1]南京工业大学材料科学与工程学院,南京教授210009 [2]常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟215500

出　　处：《煤炭转化》2010年第2期85-87,91,共4页Coal Conversion

基　　金：江苏省新型功能材料重点实验室开放基金资助项目(06KFJJ001)

摘　　要：针对钙基烟气脱硫剂分散性差、易团聚和比表面积小的缺点,在消化过程中加入不同量的聚乙二醇(PEG600,PEG1500,PEG2000),对消化产物进行改性.结果表明,在搅拌时间30min,水/灰=1.4:1(摩尔比)条件下,PEG600添加量为3%时,消化产物颗粒均匀,平均粒径为9.4μm,比表面积达到21.6m2/g.XRD,SEM和FT-IR测试表明,添加PEG后,石灰消化完全,转化率较高,分散性得到改善,说明PEG对氢氧化钙有一定的包覆作用.In the hydrated process, calcium-based flue gas desulfurization sorbent has the poor dispersion, the small surface area and ease to get group. The hydrated products were modified by adding different amount PEG was studied in this paper. The results showed that when the hydration period of 30 min and the water to lime molar ratio of 1. 4 ： 1, the optimal adding amount of PEG600 was 3 %, the particle size of hydrated products was uniform, an average particle size was 9.4μm, and the surface area was 21.6 m^2/g. XRD, SEM and FT-IR showed that lime was hydrated completely, lime slaking rate was high, and the dispersion was improved. In addition, calcium hydroxide was coated with PEG.

关 键 词：钙基脱硫剂 聚乙二醇 二氧化硫 

分 类 号：TQ028[化学工程] X701.3[环境科学与工程—环境工程]