Catalytic pyrolysis of demineralized lignocellulosic biomass

FUEL

卷:252

Article

Persson, H.¹  Yang, W.¹ 

[1] KTH Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden

关键词: Biomass;    Ash;    Pre-treatment;    Pyrolysis;    Catalyst;   

DOI  :  10.1016/j.fuel.2019.04.087

来源: Elsevier

【 摘 要 】

The effect of ash removal pre-treatment of lignocellulosic biomass prior to catalytic pyrolysis for producing biofuels was investigated. Non-catalytic and catalytic pyrolysis of demineralized and raw biomass was performed in Py-GC/MS and bench-scale experiments to study the performance of in-bed and ex-bed upgrading. Pre-treated biomass shows a significant increase in the organic liquid yield in experiments performed at 600 degrees C: from 31 to 42 wt% compared to raw biomass, as well as a significant reduction of char yield. The performance of inbed catalytic pyrolysis of pre-treated biomass over HZSM-5 is limited compared to the corresponding raw material. However, ex-bed catalytic pyrolysis of pre-treated biomass at 600 degrees C results in an overall increased yield of BTX compounds. Pyrolysis vapors from pre-treated biomass present a suitable composition for catalytic upgrading after secondary vapor-phase reactions. Additionally, demineralization reduces the total acid number of derived liquids in catalytic and non-catalytic pyrolysis.

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