### 催化剂对CaO固硫反应动力学的影响

1. 清华大学化学系.北京(100084);清华大学热能系
• 出版日期:2000-11-15 发布日期:2000-11-15

### Effects of catalysts on the kinetics of CaO desulfurization

Wu Zenghua;Kou Peng;Qiu Xinping;Xue Fangyu;Chen Changhe

1. Tsing Hua Univ, Dept Chem.Beijing(100084)
• Online:2000-11-15 Published:2000-11-15

Kinetics of CaO desulfurization reaction and the effects of some catalysts on it were investigated by thermogravimetric analysis method. the results showed that the conversion of CaO increases with the increase of temperature. The kinetic behavior of desulfurization can be explained by grain model. The activation energy of surface reaction (E~a) and the activation energy of product layer diffusion (E~p) were determined by using the model. The overall rate of desulfurization is controlled initially by surface chemical reaction, and then shift to product layer diffusion control. Some alkali metal chlorides were chosen as catalysts. These salts can improve both the initial reaction rate and final fraction conversion of CaO. E~a decreases orderly when the added catalysts changed from Li, Na, K to Cs, while E~p increases.