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

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.

Graphical abstractHydrolysis of carbonyl sulfide over hydrotalcite-derived Zn–Ni–Al mixed oxides was investigated and calcination temperature has a marked influence on the catalyst activity.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Calcined HTLCs were studied as catalysts for hydrolysis of carbonyl sulfide. ► Influence of calcination temperature on the decomposition of HTLCs was studied. ► Influence of calcination temperature on the catalytic activity was studied.