有机钙孔隙结构与脱硫性能研究  

Pore Structure and Desulfurization Characteristics of Organic Calcium

作　　者：肖海平[1] 李惊涛[1] 周俊虎[2] 孙保民[1] 叶力平 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206 [2]浙江大学能源清洁利用国家重点实验室,杭州310027 [3]杭州广翰能源科技有限公司,杭州310027

出　　处：《环境科学》2008年第8期2361-2365,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2006CB200303);教育部新世纪优秀人才支持计划项目(NCET-04-0533)

摘　　要：在定碳炉上对有机钙进行煅烧试验,利用氮吸附仪测定样品的微观孔隙结构,采用智能定硫仪对有机钙进行了脱硫实验研究.结果表明,900℃下煅烧,醋酸钙镁的比表面积高达46.6 m^2/g,大约为普通石灰石比表面积的4倍.醋酸钙比表面积主要分布在孔径小于5 nm的微孔和中孔,醋酸钙镁比表面积主要集中在孔径为5 nm左右的中孔.醋酸钙的烧结主要发生在微孔和中孔,醋酸钙镁的烧结发生在整个孔径分布区域,有机钙表现出良好的抗烧结特性.1 000℃下按钙硫比为1添加钙基,有机钙的脱硫效率为68.28%-75.55%,比普通石灰石高1倍以上.煅烧形成的良好孔隙结构使得有机钙具有较高的脱硫效果.Calcination of oganic calcium was carried out in fixed bed,pore structure of tested sample was analyzed with auto-adsorption analyzer,and desulfurization experiment was studied by intelligent sulfur determination analyzer.Specific surface area of calcium magnesium acetate（CMA） was 46.6m·2/g after calcination at 900℃,almost four times of that of limestone.Specific surface area of calcium acetate（CA） were mainly made up of pore of diameter less than 5 nm,and those of CMA was chiefly contributed by middle pore of diameter about 5 nm.Agglomeration of CA occurred in pore of diameter less than 5 nm,while CMA was sintered in whole range of pore size distribution.Agglomeration of organic calcium were slighter.Desulfurization efficiency of organic calcium ranged from 62.28% to 75.55% at 1000℃ as calcium/sulfur ratio being one,which was one time more than that of limestone.Perfect pore structure of organic calcium contributes to higher desulfurization efficiency.

关 键 词：有机钙 醋酸钙镁 醋酸钙 孔隙结构 脱硫 

分 类 号：X701.3[环境科学与工程—环境工程] TQ534.9[化学工程—煤化学工程]