Tuning performance of Pd/Sn0.9Ce0.1O2 catalyst for methane combustion by optimizing calcination temp

• 作 者: Kai Shen Jia-Pan Lin Qian Xia Lu Dai Guo-Jun Zhou Yang-Long Guo Guan-Zhong Lu Wang-Cheng Zhan
• 机 构: Technology Center, China Tobacco Zhejiang Industrial Co.,Ltd., Hangzhou 310024, China;Key Laboratory
• 出 处: 稀有金属（英文版）
• 发表日期: 2019年2期
• 关键词: Catalytic combustion Methane PdO SnxCe1-xO2 Calcination temperature

A series of 0.2 wt％ Pd/Sn0.9Ce0.1O2 catalysts were prepared by impregnation method based on the presynthesis of Sn0.9Ceo.1O2 support prepared by co-precipitation method,and then characterized by Brunauer-Emmett-Teller (BET),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),Raman,CO chemical adsorption and hydrogen temperature-programmed reduction (H2-TPR) techniques.The effect of calcination temperature of the composite oxide support on the catalytic performances of the Pd/Sn0.9Ce0.1O2 catalyst for the CH4 total oxidation was studied.It is found that the catalytic activity of the Pd/Sn0.9Ce0.1O2 catalyst increases with the increase in calcination temperature of the Pd/Sn0.9Ce0.1O2 support.The 0.2 wt％ Pd/Sn0.9Ce0.1O2/l100 catalyst (the Pd/Sn0.9Ce0.1O2 support was calcined at 1100 ℃) exhibits the best reactive activity (T10 =255 ℃).The excellent activity of the 0.2 wt％ Pd/Sn0.9Ce0.1O2/l100 catalyst should be attributed to the high reducibility of PdO,the excellent oxygen mobility of the support and the high content of active Pd2+ species on the Pd/Sn0.9Ce0.1O2 catalyst.