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.
出处
《环境科学》
EI
CAS
CSCD
北大核心
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)
关键词
有机钙
醋酸钙镁
醋酸钙
孔隙结构
脱硫
organic calcium
calcium magnesium acetate
calcium acetate
pore structure
desulfurization
