纳米α-FeOOH催化剂一段法脱除COS和H2S性能的研究

利用均相沉淀法、氨水滴定法制备纳米α-FeOOH粒子，以该粒子为活性组分制备催化剂，利用微反－色谱联用活性评价技术，在常压、空速10 000 h－1、25 ℃～60 ℃温度范围内考察了纳米α-FeOOH催化剂对COS催化水解的活性。采用热重法对纳米α-FeOOH催化剂脱除H2S的性能进行了研究。结果表明：纳米α-FeOOH催化剂对COS水解在低温度、大空速下具有高的活性，系列Ⅰ和系列Ⅱ催化剂分别在60 ℃和40 ℃～45 ℃时COS转化率达到100%。在60 ℃时各种催化剂吸附H2S的能力最强，最高饱和硫容可达到21.72w%。催化剂表面能量分布不均匀，COS催化水解在低温时存在补偿效应。

STUDY ON SIMULTANEOUS REMOVAL OF COS AND H2S BY USING α-FeOOH NANOPARTICLE

α-FeOOH nanoparticles were prepared using homogeneous precipitation and ammonia titration methods. The catalytic activity of the catalysts using α-FeOOH nanoparticle as active ingredient for COS hydrolysis were tested by a microreactor-chromatography assessing apparatus at the atmospheric pressure in the temperature range from 25 ℃～60 ℃ with gas hourly space velocity 10 000 h－1. The performance of the catalysts for H2S removal was investigated by means of thermal gravimetric method. The results show that the nanoparticle-based catalyst is highly active for COS hydrolysis at low temperature at high space velocity. Conversion of COS can attain 100% by use of series Ⅰ and Ⅱ catalysts at 60 ℃ and 40 ℃～45 ℃ respectively. The highest saturated sulfur capacity for H2S can reach 21.72% at 60 ℃. Further, it is also observed that the surface energy distribution on the catalysts is heterogeneous and a compensation effect exists.