Methane aromatizing catalyst and use thereof in preparation of arenes

Abstract

A catalyst for synthesizing arene directly from methane is composed of WO3 or MoO3 as active component (1-20 wt.%) and MCM-49 zeolite as carrier. The aromatizing reaction of methane or the mixture of methane and CO2 takes place in fixed-bed reactor at 650-800 deg.C, 0.05-2.5 MPa and 100-5000 ml / g.h. The product has high benzene content near 90%.

Description

technical field [0001] The invention relates to the technology of producing aromatics from methane, in particular, it provides a new catalyst for directly synthesizing benzene from methane with high selectivity and the application of the catalyst in the reaction of producing benzene from methane. Background technique [0002] Methane can be thermally converted to benzene at a temperature greater than 900°C, and 6-10% of benzene can be obtained at a temperature of 1200-1300°C. [0003] For the methane conversion process under catalytic conditions, Science reported the results of catalytic synthesis of aromatics from methane on a silica gel catalyst in 1966, and the yield of aromatics was 4.2-7.2% at 1000°C. In addition, in the 1980s, it was reported that methane catalyzed the synthesis of aromatic hydrocarbons on boron nitride (BN) multifunctional composite metal oxides, high silica zeolite supported Pt-Cr and Ga catalysts, and carbon fiber materials. [0004] In 1993, Xie M...

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Problems solved by technology

However, in the above-mentioned reports, there is no use of MCM-49 as a carrier for methane aromatization catalysts