Selective Conversion of Syngas to Aromatics over a Mo−ZrO₂/H‐ZSM‐5 Bifunctional Catalyst

Abstract

Direct conversion of syngas to aromatics is an extremely challenging target due to the complex reaction pathways. Herein, we present a well‐designed bifunctional catalyst composed of Mo‐doped ZrO2 nanoparticles and zeolite H‐ZSM‐5 for one‐step conversion of syngas to aromatics. The Mo−ZrO2 converts syngas to methanol as reaction intermediate, which can be successively converted to aromatics by H‐ZSM‐5. Hydrogenation ability of mixed oxides is pivotal to both selectivity and productivity of aromatics. We intensively clarify the individual role of catalyst components among CO activation, H2 activation and aromatization. With a Mo/Zr molar ratio of 1 : 68, the Mo−ZrO2/H‐ZSM‐5 resulted in 76 % selectivity of aromatics at 22 % CO conversion, and the productivity of aromatics reached 0.17 g gcat−1 h−1 at 400 °C and 4 MPa. Moreover, the distribution of aromatics can be tuned by surface modification of H‐ZSM‐5.

Direct conversion of syngas to aromatics: A review of recent studies

“…By adjusting the Ce/Zr ratio and creating a good kinetic matching between C-O activation and C-C coupling, a high aromatic selectivity of 83.1% was achieved over the Ce0.2Zr0.8O2/ZSM-5 catalyst. Zhou et al [65] used Mo-doped ZrO2 to modulate the hydrogenation ability and then combined it with H-ZSM-5 to obtain superior aromatic selectivity.…”

Relay catalysis in the direct conversion of carbon dioxide to high-value chemicals

“…Cheng等 [46] [53] (网络版 彩图) [69] . 轻质芳烃多烷基化也 影响产物的芳烃选择性, 降低重要轻质芳烃选择 性 [70,71] . 此外, 高压和低空速操作条件容易导致稠环 [71] ).…”

Conversion of CO2 and H2 into propane over InZrO and SSZ-13 composite catalyst

“…In order to break through the ASF distribution, a novel concept of catalyst designing, which is called oxide-zeolite composite catalyst, has recently been proposed by Bao and Wang et al [4,[12][13][14][15][16][17][18][19][20][21][22][23]. Since then, by continuously exploring the composite catalysts, a lot of valuable hydrocarbons such as lower olefins [12,13,16,[24][25][26], aromatics [17,[27][28][29][30][31][32], and gasoline [15,33,34] have been selectively synthesized in syngas conversion or CO 2 hydrogenation.…”