EFFECT OF ALKALI-MODIFIED HZSM-5 MODIFIED ON CATALYTIC PYROLYSIS OF BIOMASS MODEL COMPOUNDS

Li Yanji; Yi Jiajing; He Qiang; Yang Zhentao

doi:10.19912/j.0254-0096.tynxb.2020-0835

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 383-390. DOI: 10.19912/j.0254-0096.tynxb.2020-0835

EFFECT OF ALKALI-MODIFIED HZSM-5 MODIFIED ON CATALYTIC PYROLYSIS OF BIOMASS MODEL COMPOUNDS

Li Yanji, Yi Jiajing, He Qiang, Yang Zhentao

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Abstract

In this experiment, Py-GC/MS was used to investigate the influence mechanism of product distribution of biomass model compounds in catalytic pyrolysis of HZSM-5 modified by NaOH、Na₂CO₃ and CTAB/TPAOH at 500 ℃. The results showed that the yield of small-molecular ketones, phenols and esters in the products was increased in catalytic pyrolysis over HZSM-5 modified by 0.1 mol/L NaOH/Na₂CO₃, and the formation of C_≥5hydrocarbon was enhanced. 0.2 mol/L NaOH/Na₂CO₃ modification HZSM-5 catalyst facilitates decarbonylation and dehydroxylation, and promotes the cracking of cyclic compounds into chain compounds. The yield of ketones in the products decreased to 18.56% and that of aldehydes increased to 3.01% in pyrolysis over HZSM-5 co-modified by utilization of TPAOH and NaOH. Meanwhile, the yield of C_≥9 hydrocarbon decreased in the catalytic pyrolysis, which was due to that C_≥9hydrocarbon converted to C_≤4 hydrocarbon, and the yield of chain hydrocarbons increased. C_≥9hydrocarbon in the products converted to C_5-8 hydrocarbon in the pyrolysis over HZSM-5 co-modified by CTAB and NaOH, and the yield of cyclic hydrocarbon increased in this process.

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biomass energy / catalytic pyrolysis / alkali modification / HZSM-5

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Li Yanji, Yi Jiajing, He Qiang, Yang Zhentao. EFFECT OF ALKALI-MODIFIED HZSM-5 MODIFIED ON CATALYTIC PYROLYSIS OF BIOMASS MODEL COMPOUNDS[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 383-390 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0835

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