太原理工大学学报2011，Vol.42Issue(3)：268-272,5.
氧化铁高温煤气脱硫剂再生动力学行为研究
Regeneration Kinetics Study of Fe2O3-based High Temperature Coal Gas Desulfurization Sorbent in Atmosphere with Sulfur Dioxide
摘要
Abstract
The effects of regeneration temperature and SO2 concentration on the regeneration reactivity of iron oxide sorbent in SO2 atmosphere were investigated by using a thermogravimetric analyzer.The results show that iron oxide sorbent was regenerated only when the regeneration temperature was higher more than 600℃, and high regeneration temperature and SO2 concentration increased regeneration rate.The regeneration reaction order was confirmed to be the first order by using a homogeneous reaction model.Kinetic model tests show that the regenerationprocess was well fitted by the equivalent grain model.The kinetic controlling steps transformed from chemical reaction controlling at the early regenerating stage to inner diffusion controlling at the latter regenerating stage in the regeneration process in SO2 atmosphere.The apparent kinetic parameters of regeneration reaction of iron oxide sorbent were calculated according to the model.The apparent activation energy of the chemical reaction and corresponding frequency factor were 160.56 kJ/mol and 8.79×107 m/s, respectively,while the diffusion activation energy and corresponding frequency factor were 45.40 kJ/mol and 6.4× 10-3 m2/s, respectively.关键词
高温煤气脱硫/氧化铁脱硫剂/再生动力学/等效粒子模型Key words
hot gas desulfurization/ iron oxide sorbent/ regeneration kinetics/ equivalent grain model分类
化学化工引用本文复制引用
张红霞,赵瑞壮,上官炬..氧化铁高温煤气脱硫剂再生动力学行为研究[J].太原理工大学学报,2011,42(3):268-272,5.基金项目
国家重点基础研究发展规划项目(2005CB221203) （2005CB221203）
