Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid

Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid

Levulinic acid is a sugar-derived building block that can be produced from biomass feedstock as an alternative to the petrochemical resources. The purpose of this study was to investigate the performance of HY zeolite supported chromium catalysts in producing levulinic acid from glucose, cellulose a...

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Main Author: Ya'aini, Nazlina
Format: Thesis
Language:English
Published: 2012
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/33372/1/NazlinaYa%27ainiMFKK2012.pdf
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spelling my-utm-ep.333722021-05-27T05:04:21Z Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid 2012-12 Ya'aini, Nazlina TP Chemical technology Levulinic acid is a sugar-derived building block that can be produced from biomass feedstock as an alternative to the petrochemical resources. The purpose of this study was to investigate the performance of HY zeolite supported chromium catalysts in producing levulinic acid from glucose, cellulose and lignocellulosic biomass before it was further optimized using response surface methodology (RSM). The catalysts comprising of different weight ratios of CrCl3 and HY zeolite (1:1, 1:2 and 2:1) were synthesized using wetness impregnation method. Characterization of the catalysts using XRD, BET, FT-IR, TGA, NH3-TPD and FT-IR of adsorbed pyridine demonstrated the catalytic reaction of the catalysts was predominantly influenced by type (Lewis acid), amount and strength of acid sites, surface area, hierarchical porous structures and shape selectivity of the catalysts. Experimental results showed that the CrC3/HY–1:1 catalyst exhibited the highest catalytic performance with 62% levulinic acid yield at reaction temperature, 160 ºC and reaction time, 180 min. Optimization of levulinic acid was conducted using the potential CrC3/HY–1:1 catalyst and ionic liquid, [EMIM][Cl] was introduced as a solvent for the cellulose conversion to levulinic acid. At optimum process conditions, 55.2%, 46.0%, 15.5% and 15.0% of levulinic acid yields were produced from glucose, cellulose, empty fruit bunch (EFB) and kenaf. Meanwhile, in the presence of ionic liquid under the same process conditions, 20.0% and 17.0% of levulinic acid yields were produced from EFB and kenaf. In addition, the compositions of EFB and kenaf were determined to compute the highest theoretical levulinic acid yields in the samples feedstock and the efficiencies of the catalytic process. This study demonstrated that the combination of the proposed catalyst with ionic liquid has potential to be applied in biomass conversion to levulinic acid under adequate process conditions. 2012-12 Thesis http://eprints.utm.my/id/eprint/33372/ http://eprints.utm.my/id/eprint/33372/1/NazlinaYa%27ainiMFKK2012.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Ya'aini, Nazlina
Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
description Levulinic acid is a sugar-derived building block that can be produced from biomass feedstock as an alternative to the petrochemical resources. The purpose of this study was to investigate the performance of HY zeolite supported chromium catalysts in producing levulinic acid from glucose, cellulose and lignocellulosic biomass before it was further optimized using response surface methodology (RSM). The catalysts comprising of different weight ratios of CrCl3 and HY zeolite (1:1, 1:2 and 2:1) were synthesized using wetness impregnation method. Characterization of the catalysts using XRD, BET, FT-IR, TGA, NH3-TPD and FT-IR of adsorbed pyridine demonstrated the catalytic reaction of the catalysts was predominantly influenced by type (Lewis acid), amount and strength of acid sites, surface area, hierarchical porous structures and shape selectivity of the catalysts. Experimental results showed that the CrC3/HY–1:1 catalyst exhibited the highest catalytic performance with 62% levulinic acid yield at reaction temperature, 160 ºC and reaction time, 180 min. Optimization of levulinic acid was conducted using the potential CrC3/HY–1:1 catalyst and ionic liquid, [EMIM][Cl] was introduced as a solvent for the cellulose conversion to levulinic acid. At optimum process conditions, 55.2%, 46.0%, 15.5% and 15.0% of levulinic acid yields were produced from glucose, cellulose, empty fruit bunch (EFB) and kenaf. Meanwhile, in the presence of ionic liquid under the same process conditions, 20.0% and 17.0% of levulinic acid yields were produced from EFB and kenaf. In addition, the compositions of EFB and kenaf were determined to compute the highest theoretical levulinic acid yields in the samples feedstock and the efficiencies of the catalytic process. This study demonstrated that the combination of the proposed catalyst with ionic liquid has potential to be applied in biomass conversion to levulinic acid under adequate process conditions.
format Thesis
qualification_level Master's degree
author Ya'aini, Nazlina
author_facet Ya'aini, Nazlina
author_sort Ya'aini, Nazlina
title Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
title_short Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
title_full Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
title_fullStr Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
title_full_unstemmed Levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
title_sort levulinic acid production from lignocellulosic biomass using hy zeolite supported chromium catalyst in ionic liquid
granting_institution Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department Faculty of Chemical Engineering
publishDate 2012
url http://eprints.utm.my/id/eprint/33372/1/NazlinaYa%27ainiMFKK2012.pdf
_version_ 1747816145465901056

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