Conversion of methane and carbon dioxide to aromatics over chromium-based catalysts: selectivity and yield of main products

摘要

Over a 7.5wt/100Cr/5.0wt/100Na/SiO_2 catalyst, the selectivities of 4.8/100 and 48.7/100 to C_2 hydrocarbons and aromatics, respectively, as well as yield of aromatics of 1.9/100 correspondingly were achieved under the conditions of 0.5 Mpa, CH_4/CO_2 molar ratio of 1.4, 840 deg. C and contact time (W/F) of 0.79 h·g·L~-1. The conversions of CH_4 and CO_2 to ethylene and the polymerization of intermediate ethylene to aromatics, have been achieved in one step over the sodium-promoted chromium-based catalyst.