Conversion of rice husks cellulose to levulinic acid on hierarchical Mn3O4/ZSM-5 catalyst from natural aluminosilicate

F. Angellinnov, H. Yusuf, D. U.C. Rahayu, Y. K. Krisnandi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Rice husks contain many compounds, one of them is cellulose that can be converted to levulinic acid (4-oxopentanoic acid). Rice husks need to be pretreated to get larger amount of cellulose so that the yield of levulinic acid is higher. Prior to pre-treatment, rice husks were grinded and sieved, followed by dewax. In this study, rice husks were pretreated using chemical method, namely delignification using NaOH 10%, and mechanical method using ball milling and ultrasonication. The pretreated rice husks were then converted to levulinic acid using Mn3O4/ZSM-5 catalyst (2% of Mn loading) that was synthesized using natural aluminosilicate. The XRD pattern of the catalyst confirmed the structure of MFI, while XRF data gave the Si/Al ratio of 9.31. The pretreated rice husks were characterized using FTIR, and the conversion result were characterized using HPLC. FTIR spectra show that both methods successfully reduced lignin and hemicellulose. Based on HPLC results, the reaction of rice husks pretreated with chemical method gave the highest yield of levulinic acid (14%), followed by mechanical method using ultrasonication (8%) and ball milling (6%). These results show that besides chemical method, mechanical method can also be used as pre-treatment method on biomass in order to get higher yield of levulinic acid in this conversion reaction.

Original languageEnglish
Title of host publication8th International Conference of the Indonesian Chemical Society, ICICS 2019
EditorsMohamad Rafi, Rudi Heryanto, Wulan Tri Wahyuni
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420021
DOIs
Publication statusPublished - 4 Jun 2020
Event8th International Conference of the Indonesian Chemical Society 2019, ICICS 2019 - Bogor, Indonesia
Duration: 6 Aug 20197 Aug 2019

Publication series

NameAIP Conference Proceedings
Volume2243
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference8th International Conference of the Indonesian Chemical Society 2019, ICICS 2019
CountryIndonesia
CityBogor
Period6/08/197/08/19

Keywords

  • Bayat zeolite
  • cellulose
  • kaolin
  • levulinic acid
  • MnO/ZSM-5
  • rice husks

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