Kinetic Analysis of Sulfation of Fe-Ca Based Sorbent for FGD
Sulfation performance of a Fe-Ca based sorbent prepared from iron oxide-rich metallurgical dust and lime is investigated using thermogravimetric analysis (TGA) in the temperature range of 300-550℃,and the kinetics of the sulfation reaction is analyzed using the grain model.Comparison between the model simulation results and experimental data demonstrates that the grain model can give a relatively satisfactory description of the experimental results.In detail,the overall rate of the sulfation reaction is mainly controlled by diffusion,despite by chemical kinetics at a very low degree of conversion (lower than 0.056),and that the higher diffusion activation energy (ED,25460J/mol) and smaller diffusion frequency factor (De0,4.42× 10-2 cm2/min),in relative to those of the sulfation reaction (13008J/mol for Ea and 1.65 cm/min for k0),may account for the shift in control mechanism,the role of diffusion in the sorbent conversion,and consequently the fiat-convex conversion vs.time curves obtained by TGA.
Sorbent Solid waste Grain model Sulfation
ZHAO Rongfang SHEN Youliang RUAN Chengxiang GAO Weimin
Jiangxi Key Lab of Surface Engineering,Jiangxi Science & Technology Normal University,Nanchang,330013,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1093-1097
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）