贝壳和石灰石作为燃煤固硫剂的微观结构特性.pdfVIP

　第 54 卷 　第 2 期 　 　化 　　　工 　　　学 　　　报 　　　 　　　　Vol54 　№2 ( ) 　 2003 年 2 月 　 　Journal 　of 　Chemical 　Industry 　and 　Engineering 　 China 　 　February 　2003 研究简报 　贝壳和石灰石作为燃煤固硫剂的微观结构特性 路春美 　赵建立 　韩奎华 　 ( ) 　 山东大学能源与动力工程学院 ,山东 济南 25006 1 关键词 　贝壳 　石灰石 　微观结构 　扫描电镜 　固硫特性 中图分类号 　X 5 11 　　　　　　文献标识码 　A 文章编号 　0438 - 1157 (2003) 02 - 0273 - 04 MICRO STRUCTURAL CHARACTERISTIC S OF SHELL AND LIMESTONE A S BURNIN G COAL SUL FUR SORB ENT LU Chunmei ,ZHAO J ianli and HAN Kuihua ( I ns tit ute of Energy an d Pow er Eng ineering , S han dong University , J inan 25006 1, S han dong , China) Ab stract 　The micro st ruct ure of t he raw ,calcined ,and desulfurized samples of shell and limestone was detected and analyzed by SEM Their abilit y of capt uring SO2 was verified by using L C T2 t hermobalance and t he high temperat ure t ube reactor The result s showed t hat t he better pore st ruct ure and smaller gas diffusion resist ance of shell were in favor of t he inner reaction for SO2 gasShell had higher calcium utilization ratio t han t hat of limestone especially under t he conditions of high reaction temperat ure and t he increased reaction timeThe bigger difference of t he inner st ruct ure was found in t he reaction of sulfation after calcination and direct sulfation In direct sulfation , t he reaction was rest rained because of t he bad pore connectivity , while t he