2020/12/04 by Haoran Du, Zhaoping Zhong, Bo Zhang +2
Engineering · #Catalysis and Hydrodesulfurization Studies #Lignin and Wood Chemistry #Thermochemical Biomass Conversion Processes
paper · doi:10.1002/cjce.23977
openalex publication_date 2020/12/04 · crossref created 2020/12/04 · crossref issued 2021/01/24 · crossref published 2021/01/24 · crossref published-online 2021/01/24 · crossref published-print 2021/09/01 · crossref deposited 2023/08/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04 · crossref indexed 2026/08/04
Abstract To obtain high‐value bio‐oil, pure ceria (CeO 2 ) and a series of Ce/Fe composite metal oxides were synthesized via precipitation method and were used to enhance hydrocarbons and ketones production during catalytic pyrolysis of bamboo sawdust. The characterization results were comprehensively analyzed and revealed that doping CeO 2 with Fe promoted the formation of a solid solution structure, which further increased the surface area and number of oxygen vacancies of the catalyst for deoxygenation. Experimental consequences demonstrated that, compared to non‐catalytic trial, the catalytic pyrolysis over CeO 2 generated lower amounts of acids and aldehydes, and enhanced the conversion of large oxygenates to monofunctional hydrocarbon precursors via decarboxylation, deoxidation, and ketonization. The concentrations of hydrocarbons and ketones obtained over Ce/Fe catalysts were significantly higher than those obtained over CeO 2 , and that was attributed to the higher surface area and oxygen storage capacity of Ce/Fe catalysts. Particularly, the composite catalyst with the Ce/Fe molar ratio of 4 (Ce 0.8 Fe 0.2 ) presented the most optimal deoxidation capacity in this study. The relative concentration of hydrocarbons generated over Ce 0.8 Fe 0.2 was the highest, and monocyclic aromatics and short‐chain aliphatic hydrocarbons accounted for 47.13% and 29.72%, respectively, of the total hydrocarbons. Simultaneously, the amount of ketones, the main hydrocarbon precursors, obtained over Ce 0.8 Fe 0.2 was significantly higher than that obtained over CeO 2 , and the fraction of linear and cyclic ketones of the total ketones increased from 45.96% for the non‐catalytic pyrolysis to 97.57%. This further confirmed that the mesoporous Ce/Fe composite catalysts efficiently catalyzed the aldol condensation and ketonization reactions.