CO铁基高温变换催化剂羰基硫中毒热力学  

Thermodynamic Analysis for Carbonyl Sulfide Poisoning of CO Iron-Based High Temperature Shift Catalyst

作　　者：田春梅[1] 宁平[1] 田森林[1] 杨玲菲[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650093

出　　处：《化学反应工程与工艺》2010年第3期235-241,共7页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金资助项目(50768006;50878101)

摘　　要：采用热力学计算方法分析了高温铁基变换催化剂在密闭电石炉气条件下与羰基硫（COS）可能发生的反应及其产物，比较不同反应的吉布斯自由能和化学平衡常数。结果表明，在催化活性温度300600℃，COS，Fe3Ot与O2反应生成Fe2（SO4）3和CO2的反应的吉布斯自由能小于0且绝对值最大，热力学平衡常数最大，是竞争能力最强的主导反应。所有可能发生的反应的主要产物为FeSO4，Fe7S8和FeS，会使催化剂永久地丧失部分或全部活性，造成永久性中毒。The possible reactions and products of carbonyl sulfide （COS） and high temperature shift catalysts under the conditions of the carbide furnace gas were investigated by analyzing the Gibbs free energies and the equilibrium constants of each reaction. The results showed that the Gibbs free energy of reaction of COS, Fe3O4 and O2 to Fe2 （SO4）3 and CO2 was less than 0 and its absolute value was the highest, and its equilibrium constant was the highest, which indicated that the reaction was the most competetive reaction. The products of the reaction of COS and Fe3O4 were FeSO4, FeTS8 and FeS, which led to catalyst deactivation and poisoning.

关 键 词：高温变换催化剂 羰基硫 中毒 热力学分析 

分 类 号：O643.362[理学—物理化学] O642.1[理学—化学]