| 脱硫剂分形孔结构特性及其硫化活性的研究 |
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| 引用本文： | 缪明烽,沈湘林.脱硫剂分形孔结构特性及其硫化活性的研究[J].环境科学学报,2001,21(5):519-524. |
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| 作者姓名： | 缪明烽 沈湘林 |
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| 作者单位： | 东南大学洁净煤发电与燃烧技术教育部重点实验室,热能工程研究所,南京,210096 |
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| 基金项目： | 国家重点基础研究专项经费 (G19990 2 2 2 0 6 )资助 |
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| 摘 要： | 钙基脱硫剂的分形特性反映了孔结构的物理信息和化学反应性能，在分形理论和气体在分形孔通道中的非线性扩散理论的基础上，结合实验，讨论了CaO孔结构的分形特性、SO2气体在分形孔通道中的扩散特性，并分析了SO2浓度分布对CaO的孔堵塞和不可进入孔形成的影响。结果表明：在一定的硫化条件下，脱硫剂分形特性影响着SO2在CaO孔隙中的浓度分布，SO2的浓度梯度越大，硫化过程中孔隙内部生成不可进入的孔隙越多，脱硫剂的孔隙利用率越低，越易失去硫化活性。
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| 关 键 词： | 钙基脱硫剂 分形特性 气体扩散 孔结构 硫化活性 大气污染 污染治理 废气处理 |
| 文章编号： | 0253-2468(2001)-05-0519-06 |
| 收稿时间： | 2000/10/30 0:00:00 |
| 修稿时间： | 2000年10月30 |
An investigation on fractal pore structures and sulfation performances of calcium-based sorbents |
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| MIAO Mingfeng and SHEN Xianglin.An investigation on fractal pore structures and sulfation performances of calcium-based sorbents[J].Acta Scientiae Circumstantiae,2001,21(5):519-524. |
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| Authors: | MIAO Mingfeng and SHEN Xianglin |
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| Affiliation: | The Key Laboratory of Clean Coal Power Generation and Combustion Technology, Ministry of Education, Thermal Energy Engineering Research Institute, Southeast University, Nanjing 210096 and The Key Laboratory of Clean Coal Power Generation and Combustion Technology, Ministry of Education, Thermal Energy Engineering Research Institute, Southeast University, Nanjing 210096 |
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| Abstract: | The fractal characteristics of calcium based sorbents reflect the physical information and chemical performance pore structure.Based on the theory of fractal and non\|linear diffusion in pores,the fractal characteristics of pores in CaO,SO\-2 diffusion and concentration distribution in fractal pores are discussed.The influences of SO\-2 concentration distribution on the pore\|plugging and formation of inaccessible pore are analyzed with experimental results.Under the certain condition of desulfation,the fractal characteristics of sorbents determine SO\-2 concentration distribution in CaO.With the increase of SO\-2 concentration gradation in CaO,the amount of inaccessible pore volume produced in the sulfation reaction increases,and the pore utility of CaO decreases. |
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| Keywords: | calcium\|based sorbent fractal characteristic gas diffusion |
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