期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 317, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121775
关键词
Catalytic fast pyrolysis; ZSM-11; Hierarchical porosity; Hydrocarbons; Bio-oil
资金
- National Natural Science Foundation of China [21906005, 22176009]
- Beijing Natural Science Foundation [8222064]
- PetroChina Innovation Foundation
- Beihang University
Through the study of different morphologies, acidities, and secondary mesopores of ZSM-11 zeolite, it was found that ZSM-11 with aggregated nanosized single-crystal performed better in bio-oil production, especially NS-ZSM-11(20)-0.3, which had both adequate acidity and intracrystal mesopores, resulting in satisfactory bio-oil yield and hydrocarbon selectivity.
The ZSM-11 zeolite has been revealed as an undervalued catalyst for the catalytic fast pyrolysis (CFP) of biomass to produce hydrocarbon-rich bio-oil. However, the importance of hierarchical ZSM-11 in bio-oil production is still unknown. Herein, a series of ZSM-11 with varied morphologies, acidities, and secondary mesopores were synthesized and tested as catalysts in the CFP of maize straw. For the morphology series, ZSM-11 with separate nanorods (Nano-ZSM-11) or aggregated nanosized single-crystal (NS-ZSM-11) performed better in bio-oil production than microsized Micro-ZSM-11. Regarding the NS-ZSM-11 series, optimal acidity facilitated the deoxygenation of biomass vapor, while introduced intracrystal mesopores tended to improve bio-oil yield. NS-ZSM-11(20)-0.3 possessing both adequate acidity and coupling inter/intracrystal mesopores led to a satisfactory bio-oil yield (23.6 wt%) and hydrocarbon selectivity (63.6 area%), which were 1.1 and 1.3 times those for Nano-ZSM-11 (bio-oil yield: 22.0 wt%; hydrocarbon selectivity: 47.8 area%), respectively. NS-ZSM-11(20)-0.3 also showed excellent reusability in regeneration-pyrolysis cycles.
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