Preparation of La₂O₂S and its Application to COS Hydrolysis

Xiao Zhongbin, Zhang Yiqun, Ma Jianxin^#
(Institute of Industrial Catalysis, East China Univeristy of Science and Technology, Shanghai 200237)
(^# Clean Energy Automotive Engineering Center, Tongji University, Shanghai 200092)

Absrtact The preparation of La₂O₂S and its application to COS hydrolysis were studied. The effect of sulfidization time and temperature on the formation of La₂O₂S was investigated. The crystal structure of catalyst was characterized by XRD. It was found that the decomposition of LaOOH into instable La₂O₃ was the key step in the formation of La₂O₂S. Compared with traditional g-Al₂O₃, La₂O₂S showed to be superior in respect to the resistance to the poisoning of oxygen and sulfur.
Key words Lanthanum oxide, Lanthanum oxysulfide, Sulfidization, COS hydrolysis