文献类型：期刊文献

中文题名：活性炭表面SO_2的催化氧化三相反应动力学

英文题名：Three Phase Reaction Kinetics of SO 2 Catalytic Oxidation Over Activated Carbon Surface

作者：程振民[1];蒋正兴[1];袁渭康[1]

机构：[1]华东理工大学联合化学反应工程研究所

年份：1997

卷号：23

期号：1

起止页码：7

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：1997123977150);Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：二氧化硫;活性炭;脱硫;三相反应;烟气;催化氧化

外文关键词：sulfur dioxide; activated carbon; desulfurization; reactive adsorption; gas liquid solid three phase reaction

摘要：在氧和水蒸汽共存的条件下，ＳＯ２在活性炭表面发生催化氧化反应生成硫酸而使反应体系变为三相。整个反应过程可分为三个阶段，反应控制步骤为：Ｈ２ＳＯ３＊＋Ｏ＊Ｈ２ＳＯ４＊。通过对反应速率随硫酸蓄积量线性减少的原因进行分析，发现无法采用内部效率因子的概念加以解释。根据Ｌａｎｇｍｕｉｒ－Ｈｉｎｓｈｅｌｗｏｏｄ原理得出活性炭表面存在两类不同的活性中心，其中Ｈ２ＳＯ４和Ｏ２占据一类活性中心；ＳＯ２、Ｈ２Ｏ和Ｈ２ＳＯ３占据另一类活性中心。证实了大孔不参与反应，仅起到输送和蓄积硫酸的作用，反应是在剩余的微孔表面上进行的。
With coexistence of oxygen and water vapor, liquid sulfuric acid will be formed from the catalytic oxidation of SO 2 over activated carbon surface and stored in its pores, and which makes the reacting system three phase. The whole process can be divided into three stages, it was identified that the controlling step was H 2SO 3 *+O *FDF1H 2SO 4 *. An analysis was made on the reason of reaction rate decreasing linearly with amount of sulfuric acid, and it was found that such phenomena could not be explained by efficiency factor. However, based on the principle of Langmuir Hinshelwood, the authors proposed that there existed two kinds of active cites on the carbon surface, of which H 2SO 4 and O 2 occupied one sort and SO 2, H 2O and H 2SO 3 another. It was concluded that the macropores didn't take part in the reaction, but only contributed to the transport of sulfuric acid, whereas the reaction carried out over the surface of remained micropores after the first two steps.