Numerical analysis on the characteristics of carbon deposition of catalytic partial oxidation of methane in micro-chamber

Abstract

In order to get the characteristics of catalytic partial oxidation of methane in micro-scale, the numerical study is used to investigate the effects of component changing and wall temperature changing on conversion of methane and oxygen and on the selectivity of H2, CO, CO2, carbon deposition on the surface along the flow direction is also investigated. The results show that the selectivity of H2 can achieve a maximum 91.05% when the wall temperature is 1300K, at this time the selectivity of CO is high and the selectivity of CO2 is low, the carbon deposition is little on the wall; there is just a little carbon deposition on the wall and a higher selectivity of H2 and CO, meanwhile there is a lower selectivity of CO2; comprehensive consideration of conversion of CH4 and O2 and of selectivity of H2 and CO and CO2 and of the life of reactor and catalysts, the most suitable reaction conditions should be the wall temperature for 1300K and the C/O for 2.0.