Novel catalyst configuration to boost the yield of longer hydrocarbons from methanol-mediated CO2 hydrogenation
Artikel i vetenskaplig tidskrift, 2023

Various C1 feedstocks and lower hydrocarbons (C2-C4) can be produced from CO2 hydrogenation, which is an important way to utilize excess CO2 and provide alternative fuel options for dwindling fossil fuels. Herein, a novel two-bed catalytic system was developed to increase the yield of liquid range hydrocarbons, where the first catalytic bed was composed of In2O3-ZrO2 (13 wt. In %)/HZSM-5 and the second bed was a desilicated HZSM-5 placed downstream from the first bed. A maximum hydrocarbon selectivity was found to be about 86% with 7.2% CO2 conversion at 533 K, while conversion increased up to 19.3% with 71.2% hydrocarbon selectivity at 623 K while keeping the pressure at 4.0 MPa. The selectivity of longer liquid range hydrocarbons (C8-C12) was increased from 29.2% to 42.4% using the oligomerization process in which the produced lower olefins from the first bed were oligomerized to enhance the liquid range hydrocarbon over desilicated HZSM-5. Additionally, a comparative study was carried out to examine the effect of desilication over HZSM-5 having different silica-to-alumina ratios of 24 and 59. Moreover, detailed characterizations were carried out before and after the desilication of the HZSM-5 to correlate catalytic activities with physical and chemical properties of the catalysts. The results suggest that a two-bed catalytic system is a promising option to increase the yield of liquid range hydrocarbons from methanol-mediated CO2 hydrogenation while there was a negligible effect on CO2 conversion due to the second bed.

Liquid range hydrocarbons

Desilicated ZSM-5

CO hydrogenation 2

In O -ZrO 2 3 2

Oligomerization

Författare

Poonam Sharma

Chalmers, Kemi och kemiteknik, Kemiteknik

Hoang Phuoc Ho

Chalmers, Kemi och kemiteknik, Kemiteknik

Wei Di

Chalmers, Kemi och kemiteknik, Kemiteknik

Derek Creaser

Chalmers, Kemi och kemiteknik, Kemiteknik

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik

Journal of CO2 Utilization

22129820 (ISSN)

Vol. 74 102549

Ämneskategorier

Kemiska processer

Bioprocessteknik

Annan kemiteknik

DOI

10.1016/j.jcou.2023.102549

Mer information

Senast uppdaterat

2023-08-11