Mechanistic Insights into Hydrodeoxygenation of Acetone over Mo/HZSM-5 Bifunctional Catalyst for the Production of Hydrocarbons

Kai Miao, Tan Li, Jing Su, Cong Wang and Kaige Wang
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Kai Miao: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Tan Li: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Jing Su: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Cong Wang: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Kaige Wang: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Energies, 2021, vol. 15, issue 1, 1-16

Abstract: Catalytic hydropyrolysis via the introduction of external hydrogen into catalytic pyrolysis process using hydrodeoxygenation catalysts is one of the major approaches of bio-oil upgrading. In this study, hydrodeoxygenation of acetone over Mo/HZSM-5 and HZSM-5 were investigated with focus on the influence of hydrogen pressure and catalyst deactivation. It is found that doped MoO 3 could prolong the catalyst activity due to the suppression of coke formation. The influence of hydrogen pressure on catalytic HDO of acetone was further studied. Hydrogen pressure of 30 bar effectively prolonged catalyst activity while decreased the coke deposition over catalyst. The coke formation over the HZSM-5 and Mo/HZSM-5 under 30 bar hydrogen pressure decreased 66% and 83%, respectively, compared to that under atmospheric hydrogen pressure. Compared to the test with the HZSM-5, 35% higher yield of aliphatics and 60% lower coke were obtained from the Mo/HZSM-5 under 30 bar hydrogen pressure. Characterization of the spent Mo/HZSM-5 catalyst revealed the deactivation was mainly due to the carbon deposition blocking the micropores and Bronsted acid sites. Mo/HZSM-5 was proved to be potentially enhanced production of hydrocarbons.

Keywords: hydrodeoxygenation; biomass; hydropyrolysis; MoO 3; bifunctional catalysts (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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