| 脱硫剂微观结构对脱硫性能的影响 |
| 摘要点击 2190 全文点击 1926 投稿时间：2002-06-28 修订日期：2002-08-30 |
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| 中文关键词 贝壳 石灰石 微观结构 孔径分布 脱硫 |
| 英文关键词 shell limestone microstructure pore size distribution desulphurization |
| 作者 | 单位 | | 程世庆 | 浙江大学热能工程研究所能源洁净利用与环境工程教育部重点实验室,杭州,310027 | | 骆仲泱 | 浙江大学热能工程研究所能源洁净利用与环境工程教育部重点实验室,杭州,310027 | | 施正伦 | 浙江大学热能工程研究所能源洁净利用与环境工程教育部重点实验室,杭州,310027 | | 倪明江 | 浙江大学热能工程研究所能源洁净利用与环境工程教育部重点实验室,杭州,310027 | | 岑可法 | 浙江大学热能工程研究所能源洁净利用与环境工程教育部重点实验室,杭州,310027 | | 路春美 | 山东大学能源与动力工程学院,济南,250061 | | 张雷 | 山东大学能源与动力工程学院,济南,250061 |
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| 中文摘要 |
| 采用扫描电镜和压汞仪对3种贝壳和1种石灰石的微观结构及孔径分布进行了测量,采用热重分析方法对各种脱硫剂的脱硫性能进行了测试.比较发现,各种贝壳煅烧后的晶粒呈薄片状,晶粒之间孔径均大于0.2μm,比孔容较大;石灰石煅烧后晶粒呈颗粒状,晶粒之间孔径多数在0.01～0.16μm之间,比表面积很大,但比孔容较小.贝壳中直径大于0.2μm的气孔,允许气体扩散至颗粒内部,气孔表面同时参加脱硫反应,且反应过程中不易被反应产物所堵塞,脱硫反应进行较彻底,钙利用率较高.另外,在满足气体扩散的前提下,减小孔径尺寸,增加反应比表面积,将对脱硫反应有利. |
| 英文摘要 |
| The microstructure and the pore size distribution of 3 kinds of shell and 1 kind of limestone were measured with electronic scanning microscope and pore master mercury porosimeter,and the desulphurization characteristics of above absorbents were studied with thermal gravimetric analyzer. As a result, the grains of calcium from shell like tortuous flakes, with pore diameter above 0.2μm and higher pore volume,while the grains from limestone like particles, with pore diameter between 0.01 to 0.16 μm and lower pore volume, but the surface area were very high. The bigger pore which was above 0.2μm in shell had many advantages, such as fewer air blocked pores, lower gas diffusing resistance, almost simultaneous and completed reaction. So, finally the calcium conversation ratio of the shell was greater than that of the limestone. On the other hand, while the gas diffusion was meted, it was effective for desulphurization to reduce the pore size and to increase the surface area. |
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