活性炭催化还原三价钴氨络合物反应过程  

Reaction process of catalytic reduction of hexamminecobalt(Ⅲ) over activated carbon

作　　者：陈华[1] 龙湘犁[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《化学工程》2008年第8期32-35,共4页Chemical Engineering(China)

基　　金：科技部"十一五"863资助项目(2006AA05Z307)

摘　　要：用活性炭作催化剂,水作还原剂,实现钴氨脱硝法中的关键组分[Co(NH3)6]2+离子的再生,保持[Co(NH3)6]2+溶液长时高效地脱除废气中的NO。在消除扩散影响的条件下,在搅拌釜中对活性炭催化还原[Co(NH3)6]3+的反应过程进行了研究,结果表明:活性炭能催化还原[Co(NH3)6]3+的反应,而且活性炭加入量增加,反应速率也随之加快;反应速率随[Co(NH3)6]3+浓度的提高而加快;pH值是影响反应速度的一个重要因素,最佳pH值为2.74;反应温度的升高,明显地加快了反应速率。根据实验数据对该反应的本征动力学方程进行拟合,得该反应对[Co(NH3)6]3+为一级反应,反应活化能Ea=(64.62±2.06)kJ/mol。Using activated carbon as catalyst and water as reducing agent, the reduction of hexamminecobalt （Ⅲ） to hexamminecobalt （Ⅲ） was achieved to maintain the capability of removing NO with the hexamminecobalt solution. The experiments were performed in a stirred cell to study the intrinsic kinetics of the hexamminecobalt （Ⅲ） reduction over activated carbon. All the experiments were conducted without the influence of diffusion. The experimental results show that activated carbon catalyzes such reaction greatly. The reaction rate increases with the dosage of activated carbon and the concentration of h best [ Co （ NH3 ）6 ]^3＋ conversion is gained bait （IU）. pH value is an important factor that affecting the reaction. A at pH of 2.74 and a high temperature is favorable to such reaction. The experiments indicate that the reaction rate is first order with respect to [ Co（NH3 ）6 ]^3 ＋ , with the activation energy Ea = （64.62 ±2.06） kJ/mol.

关 键 词：活性炭 钴氨络离子 催化 脱硝 还原 

分 类 号：X701[环境科学与工程—环境工程]