Preparation of Nitrogen Doped Mesoporous Carbon Supported Cobalt Catalyst and Its Performance for Removal of CO in Hydrogen-Rich Gas

Abstract

In order to effectively remove CO from hydrogen-rich gas, cobalt-based nano-particle catalyst supported on nitrogen-doped ordered mesoporous carbon was prepared and characterized by X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS) and thermogravimetry-mass spectrometry (TG-MS). The effects of nitrogen doping on the self-reduction behavior of the catalyst and CO methanation reaction performance were studied. The characterization results show that the nitrogen atoms introduced into the mesoporous carbon skeleton are mainly used as the nucleation sites of cobalt oxide, which have a strong interaction with the oxide carrier, and greatly improve the dispersion of cobalt species. Thus, small nano-cobalt particles with uniform particle size are formed, which significantly promote self-reduction reaction and thereby improve the reduction degree of the catalyst. The catalyst evaluation results show that, compared with the mesoporous carbon carrier without doping, the CO removal efficiency of the catalyst doped by nitrogen is much higher.

Keywords

• fuel cell
• nitrogen doping
• mesoporous carbon
• self-reduction
• methanation
• co removal