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BioEnergy Research

, Volume 12, Issue 2, pp 359–369 | Cite as

Esterification of Levulinic Acid to Ethyl Levulinate Using Liquefied Oil Palm Frond-Based Carbon Cryogel Catalyst

  • Muzakkir Mohammad Zainol
  • Nor Aishah Saidina AminEmail author
  • Mohd Asmadi
  • Nur Aainaa Syahirah Ramli
Article
  • 140 Downloads

Abstract

Oil palm biomass, which is abundantly available in Malaysia, has many types of applications in various industries. In this study, oil palm frond (OPF) was liquefied with 1-butyl-3-methylimidazole hydrogen sulfate ([BMIM][HSO4]) ionic liquid (IL) at optimum conditions. The liquefied OPF-ionic liquid (LOPF-IL) was mixed with furfural at a ratio of 0.8 (w/w), water-to-feedstock ratio of 0.125 (w/w), and sulfuric acid loading of 0.5 mL at 100 °C for 1 h to form a gel. Carbon cryogel liquefied oil palm frond (CCOPF) was prepared using a freeze-dryer followed by calcination. CCOPF was further characterized using N2 sorption, NH3-TPD, TGA, XRD, FTIR, and FESEM to determine its physical and chemical properties. The thermally stable CCOPF exhibited a large total surface area (578 m2/g) and high total acidity (17.6 mmol/g). Next, CCOPF was tested for levulinic acid catalytic esterification by varying the parameters including ethanol-to-levulinic acid molar ratio, catalyst loading, and reaction time at 78 °C. At the optimum conditions, the conversion of levulinic acid and ethyl levulinate yield was 70.9 and 71.7 mol%, respectively. CCOPF was reusable up to five runs with no significant conversion drop. Accordingly, CCOPF is conferred as a potential biomass-derived acid catalyst for ethyl levulinate production.

Graphical Abstract

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Keywords

Oil palm frond Biomass Liquefaction 1-Butyl-3-methylimidazole hydrogen sulfate Carbon cryogel Ethyl levulinate 

Notes

Acknowledgments

The authors would like to acknowledge the Ministry of Higher Education (MOHE), Malaysia and Universiti Teknologi Malaysia (UTM) for research financial support under Fundamental Research Grant schemes (vote 4F160), Research University Grant (vote 19H95), and Professional Development Research University for Post-Doctoral Fellowship (vote 04E51).

Supplementary material

12155_2019_9977_MOESM1_ESM.docx (762 kb)
ESM 1 (DOCX 762 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Chemical Reaction Engineering Group (CREG), School of Chemical and Energy Engineering, Faculty of EngineeringUniversiti Teknologi MalaysiaJohor BahruMalaysia
  2. 2.Advanced Oleochemical Technology DivisionMalaysian Palm Oil BoardKajangMalaysia

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