Journal
CATALYSTS
Volume 11, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/catal11050534
Keywords
methanol; WGS; CO2-rich syngas; H2O sorption; CZA catalysts
Categories
Funding
- European H2020 project FLEDGED from the European Union [727600]
- H2020 Societal Challenges Programme [727600] Funding Source: H2020 Societal Challenges Programme
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This study adjusts the CO2/CO ratio in bio-syngas to favor methanol synthesis with Cu-based catalysts through CO2 shifting and water sorption strategies, leading to higher methanol production and catalytic bed productivity.
The synthesis of methanol from biomass-derived syngas can be challenging because of the high CO2 content in the bio-syngas, resulting in lower kinetics and higher catalyst deactivation. This work explores the in situ pre-treatment of a CO2-rich syngas with a CO2/CO ratio equal to 1.9 through the reverse-water gas shift reaction with the aim of adjusting this ratio to a more favorable one for the synthesis of methanol with Cu-based catalysts. Both reactions take place in two catalytic beds placed in the same reactor, thus intensifying the methanol process. The water produced during syngas conditioning is removed by means of a sorbent zeolite to prevent the methanol catalyst deactivation and to shift the equilibrium towards the methanol formation. The combination of the CO2 shifting and the water sorption strategies lead to higher productivities of the catalytic bed and, under certain reaction conditions, to higher methanol productions.
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