Frontiers of Environmental Science & Engineering
>> 2009,
Volume 3,
Issue 3
doi:
10.1007/s11783-009-0019-2
Complete oxidation of methane on CoO-SnO catalysts
Department of Environmental
Science and Engineering, Tsinghua University, Beijing 100084, China;
Available online: 2009-09-05
Next
Previous
Abstract
CoO-SnO hybrid oxides were prepared by the coprecipitation method and were used to oxidate methane (CH) in presence of oxygen. The CoO-SnO with a molar ratio of Co/(Co+Sn) at 0.75 exhibited the highest catalytic activity among all the CoO-SnO hybrid oxides. Experimental results showed that the catalysts were considerably stable in the CH combustion reaction, and were verified by X-ray photoelectron spectra (XPS). It was found that CoO was the active species, and SnO acted as a support or a promoting component in the CoO-SnO hybrid oxides. The surface area was not a major factor that affected catalytic activity. The hydrogen temperature-programmed reduction (H-TPR) results demonstrated that the interaction between cobalt and tin oxides accelerated the mobility of oxygen species of CoO-SnO, leading to higher catalytic activity.