摘要
用热重法研究了T302锌锰系脱硫剂脱除H_2S的宏观动力学行为.实验表明,该过程对H_2S为一级反应.在200～400℃的温度范围,反应初期为表面反应控制,中后期转移为颗粒扩散控制.宏观动力学行为可用等效粒子模型来描述.表面反应及固体扩散活化能分别为11.842、20.865kJ/mol.对反应存在最佳温度及固体扩散活化能大于表面反应活化能进行了讨论.
The apparent kinetics of H2S removal by T302 desulfurizer was studied by using thermo gravimetric method. Experiments showed that the reaction is of first order with respect to H2S concentration. In a temperature range of 200-400℃, the overall process was controlled by the surface reaction in the grain and came to the intrapellet diffusion controlled regime at the middle and last stage. The apparent kinetic behavior could be described by the equivalent grain model. The activation energies of surface reaction and solid diffusion were determined as 11. 842 and 20. 865kJ/mol, respectively. The reasons that there existed an optimum temperature and the activation energies of solid diffusion exceeded that of the chemical reaction were discussed.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1995年第6期725-733,共9页
CIESC Journal
基金
国家自然科学基金资助项目
