Influence of calcination temperature on the hydrolysis of carbonyl sulfide over hydrotalcite-derived Zn-Ni-Al catalyst

Publication year: 2011
Source: Catalysis Communications, In Press, Accepted Manuscript, Available online 13 June 2011

Shunzheng, Zhao , Honghong, Yi , Xiaolong, Tang , Ping, Ning , Hongyan, Wang , …

A novel catalyst for low temperature hydrolysis of carbonyl sulfide (COS) was prepared by thermal decomposition of Zn-Ni-Al hydrotalcite-like compounds (HTLCs). As the key factors of catalyst activity, effects of calcination temperature have been studied. The samples were carefully characterized by XRD, FTIR, SEM, CO2-TPD and N2 adsorption/desorption. Results showed that HTLCs calcined at 350 °C exhibited excellent activity due to the production of more M-O pairs which are active sites of the hydrolysis of COS. However, calcination at 500 °C led to the destruction of pore structure and reduction of active sites, ultimately led to a lower COS conversion.

Hydrolysis of carbonyl sulfide over hydrotalcite-derived Zn-Ni-Al mixed oxides was investigated and calcination temperature has a marked influence on the catalyst activity.