期刊
BIOMASS CONVERSION AND BIOREFINERY
卷 -, 期 -, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-023-04092-1
关键词
Zeolite extrudate; Catalytic pyrolysis; Palm frond; MFI; BEA; FAU
Catalytic pyrolysis of palm fronds using zeolite extrudates with different topologies and SiO2/Al2O3 ratios was investigated. The presence of zeolite during pyrolysis led to a reduction in bio-oil yield and an increase in gas yield. The analysis revealed the presence of furan and aromatics in the bio-oil, which were absent in non-catalytic pyrolysis. Gas analysis showed an increase in CO and CO2 yield, indicating the promotion of decarbonylation and decarboxylation. MFI and BEA-1 zeolites were more effective for deoxygenation at a low catalyst-to-feed ratio.
Catalytic pyrolysis of palm fronds using zeolite extrudates having different topology (MFI, BEA, and FAU) and SiO2/Al2O3 ratio (1.22-1.86) has been investigated in a fixed bed reactor at 500 degrees C with catalyst-to-feed ratio (C/F) of 0.16 g/g in comparison with non-catalytic pyrolysis. The gas and bio-oil products of catalytic pyrolysis were correlated to the zeolite topology and acidity. The presence of zeolite extrudate during palm fronds pyrolysis decreased the bio-oil yield while at the same time increasing the gas yield compared to non-catalytic pyrolysis implying simultaneous conversion of bio-oil pyrolysis products into gas-phase products. The bio-oil analysis revealed the presence of furan and aromatics which were absent in the non-catalytic process. Gas-phase product analysis detected a significant increase in CO and CO2 yield implying catalytic pyrolysis promoted decarbonylation and decarboxylation. Among the zeolite extrudates, MFI and BEA-1 were more effective for the deoxygenation reaction at a low C/F ratio (0.16 g/g) because they produced gas containing higher hydrocarbons than FAU and BEA-2.
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