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Hydrothermally stable HZSM-5 zeolite catalysts for the transformation of crude bio-oil into hydrocarbons

Paper ID Volume ID Publish Year Pages File Format Full-Text
47174 46462 2010 10 PDF Available
Title
Hydrothermally stable HZSM-5 zeolite catalysts for the transformation of crude bio-oil into hydrocarbons
Abstract

The hydrothermal stability of two alternative catalysts for the production of hydrocarbons from crude bio-oil has been studied. The valorisation of crude bio-oil from lignocellulosic biomass pyrolysis has been studied by means of a two-step process (thermal-catalytic) and co-feeding methanol, which are strategies that attenuate both the deposition of pyrolytic lignin and catalyst deactivation by coke deposition. A catalyst prepared based on a HZSM-5 zeolite with a SiO2/Al2O3 ratio of 80 produces a C2–C4 olefins yield of 32 wt% at 500 °C and with a space time of 0.371 (g of catalyst) h (g of oxygenates)−1. The modification of a HZSM-5 zeolite (SiO2/Al2O3 ratio of 30) by impregnation with 1 wt% of Ni produces a yield of aromatics of 42 wt% for the same temperature and space time. These catalysts are very active for bio-oil valorisation (conversion above 90%) with high hydrothermal stability, given that their kinetic behaviour is similar throughout 10 successive reaction–regeneration cycles carried out under severe operating conditions.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Two-step process (thermal-catalytic) and co-feeding of methanol attenuates pyrolytic lignin deposition and catalyst deactivation. ▶ HZSM-5 zeolite catalyst with a SiO2/Al2O3 ratio of 80 produces a C2–C4 olefins yield of 32 wt% at 500 °C and with a space time of 0.371 (g of catalyst) h (g of oxygenates)−1. ▶ HZSM-5 zeolite with SiO2/Al2O3 ratio of 30 and modified by impregnation with 1 wt% of Ni produces a yield of aromatics of 42 wt%. ▶ Both catalysts are very active for bio-oil valorisation (conversion above 90%) with high hydrothermal stability.

Keywords
Biorefinery; Bio-oil; Flash pyrolysis; HZSM-5 zeolite; Olefins; Aromatics; Catalyst deactivation
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Hydrothermally stable HZSM-5 zeolite catalysts for the transformation of crude bio-oil into hydrocarbons
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 1–2, 11 October 2010, Pages 318–327
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us