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Catalysts 2017, 7(7), 221; doi:10.3390/catal7070221

Conversion of Cellulose to Lactic Acid by Using ZrO2–Al2O3 Catalysts

1
Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1 Nigatake, Miyagino, Sendai 983-8551, Japan
2
Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand
3
Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University Research Building, Bangkok 10330, Thailand
*
Author to whom correspondence should be addressed.
Received: 26 June 2017 / Revised: 19 July 2017 / Accepted: 19 July 2017 / Published: 21 July 2017
(This article belongs to the Special Issue Catalysis of Biomass-Derived Molecules)
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Abstract

Lactic acid has a wide range of applications in many industries, both as an ingredient and as an intermediate. Here, we investigated the catalytic conversion of cellulose to lactic acid by using heterogeneous mixed-oxide catalysts containing ZrO2. Although pure ZrO2 has catalytic activity for the conversion of cellulose to lactic acid, the yield of lactic acid obtained is not satisfactory. In contrast, a series of ZrO2–Al2O3 catalysts containing various percentages of ZrO2 provided higher yields of lactic acid. The ZrO2–Al2O3 catalysts had more Lewis acid sites and far fewer base sites than ZrO2. This suggests that the Lewis acid sites on ZrO2–Al2O3 catalysts are more important than the base sites for the conversion of cellulose to lactic acid. View Full-Text
Keywords: cellulose; lactic acid; ZrO2–Al2O3; zirconium oxide; aluminum oxide; biomass cellulose; lactic acid; ZrO2–Al2O3; zirconium oxide; aluminum oxide; biomass
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Wattanapaphawong, P.; Sato, O.; Sato, K.; Mimura, N.; Reubroycharoen, P.; Yamaguchi, A. Conversion of Cellulose to Lactic Acid by Using ZrO2–Al2O3 Catalysts. Catalysts 2017, 7, 221.

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