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Upgrading of bio-oil derived from biomass constituents over hierarchical unilamellar mesoporous MFI nanosheets

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Title
Upgrading of bio-oil derived from biomass constituents over hierarchical unilamellar mesoporous MFI nanosheets
Author(s)
Hyung Won Lee; Sung Hoon Park; Jong-Ki Jeon; Ryong Ryoo; Wookdong Kim; Dong Jin Suh; Young-Kwon Park
Publication Date
2014-09
Journal
CATALYSIS TODAY, v.232, no., pp.119 - 126
Publisher
ELSEVIER SCIENCE BV
Abstract
tUnilamellar mesoporous MFI nanosheets (UMNs) were, for the first time, applied to the catalytic pyrol-ysis of the constituents of lignocellulosic biomass: cellulose, hemicellulose and lignin. A representativemesoporous catalyst, Al-SBA-15, was also applied to the same process for the purpose of comparison. Thecatalysts were characterized by N2adsorption–desorption, X-ray diffraction, temperature programmeddesorption of ammonia, and transmission electron microscopy. The synthesized UMN catalyst was com-posed of a random assembly of zeolite nanosheets with a thickness of 2.5 nm. UMN was shown to havestrong Brønsted acid sites, whereas Al-SBA-15 had weak acid sites. Catalytic pyrolysis experiments werecarried out using Py-GC/MS. The product distribution was analyzed in order to evaluate catalytic activity.Acidity had a considerable influence on catalytic activity; UMN, with a higher acidity than Al-SBA-15,exhibited higher activities for cracking and deoxygenation, producing bio-oil with a lower oxygen con-tent and with a better overall quality. Levoglucosan, which was the main product of the non-catalyticpyrolysis of cellulose, was converted to aromatics and furans on the acid sites of the catalysts. Ketones,alcohols and cyclo-compounds, the main products of the non-catalytic pyrolysis of xylan, were also con-verted to aromatics and furans by catalytic upgrading. The main products of the non-catalytic pyrolysisof lignin were phenolics, which were converted to aromatics and lighter phenolics (alkyl phenolics andmethoxy phenolics) in the presence of catalysts. Increasing the catalyst dose improved the quality of theproduct oil even further.
URI
https://pr.ibs.re.kr/handle/8788114/1551
ISSN
0920-5861
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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