摘要
The microstructure of the raw,calcined,and desulfurized sa mp les of shell and limestone was detected and analyzed by SEM.Their ability of ca pturing SO2 was verified by using LCT-2 thermobalance and the high temperatur e tube reactor.The results showed that the better pore structure and smaller ga s diffusion resistance of shell were in favor of the inner reaction for SO2 ga s.Shell had higher calcium utilization ratio than that of limestone especially under the conditions of high reaction temperature and the increased reaction tim e.The bigger difference of the inner structure was found in the reaction of sul fation after calcination and direct sulfation.In direct sulfation, the reaction was restrained because of the bad pore connectivity, while the former reaction took place with good pore connectivity.
The microstructure of the raw, calcined, and desulfurized samples of shell and limestone was detected and analyzed by SEM. Their ability of capturing SO2 was verified by using LCT-2 thermobalance and the high temperature tube reactor. The results showed that the better pore structure and smaller gas diffusion resistance of shell were in favor of the inner reaction for SO2 gas. Shell had higher calcium utilization ratio than that of limestone especially under the conditions of high reaction temperature and the increased reaction time. The bigger difference of the inner structure was found in the reaction of sulfation after calcination and direct sulfation. In direct sulfation, the reaction was restrained because of the bad pore connectivity, while the former reaction took place with good pore connectivity.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2003年第2期273-276,共4页
CIESC Journal
基金
国家自然科学基金资助项目 (No 5 99760 19)~~
