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Catalysts 2014, 4(4), 414-426; doi:10.3390/catal4040414

Valorisation of Vietnamese Rice Straw Waste: Catalytic Aqueous Phase Reforming of Hydrolysate from Steam Explosion to Platform Chemicals

1
Vietnam Academy of Agricultural Science, Vinh Quynh, Thanh Tri, Ha Noi, Vietnam
2
European Bioenergy Research Institute, School of Engineering and Applied Sciences, Aston University, Birmingham B4 7ET, UK
3
Laboratory of Bioinorganic Chemistry and Catalysis, Federal University of Paraná, CP 19081, CEP 81531-990, Curitiba, Paraná, Brazil
4
The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
*
Authors to whom correspondence should be addressed.
Received: 7 October 2014 / Revised: 20 November 2014 / Accepted: 27 November 2014 / Published: 15 December 2014
(This article belongs to the Special Issue Feature Papers to Celebrate the Landmarks of Catalysts)
View Full-Text   |   Download PDF [3046 KB, uploaded 15 December 2014]   |  

Abstract

A family of tungstated zirconia solid acid catalysts were synthesised via wet impregnation and subsequent thermochemical processing for the transformation of glucose to 5-hydroxymethylfurfural (HMF). Acid strength increased with tungsten loading and calcination temperature, associated with stabilisation of tetragonal zirconia. High tungsten dispersions of between 2 and 7 W atoms·nm−2 were obtained in all cases, equating to sub-monolayer coverages. Glucose isomerisation and subsequent dehydration via fructose to HMF increased with W loading and calcination temperature up to 600 °C, indicating that glucose conversion to fructose was favoured over weak Lewis acid and/or base sites associated with the zirconia support, while fructose dehydration and HMF formation was favoured over Brönsted acidic WOx clusters. Aqueous phase reforming of steam exploded rice straw hydrolysate and condensate was explored heterogeneously for the first time over a 10 wt% WZ catalyst, resulting in excellent HMF yields as high as 15% under mild reaction conditions. View Full-Text
Keywords: biomass; solid acid; zirconia; glucose; HMF; tungstate biomass; solid acid; zirconia; glucose; HMF; tungstate
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Giang, C.H.; Osatiashtiani, A.; dos Santos, V.C.; Lee, A.F.; Wilson, D.R.; Waldron, K.W.; Wilson, K. Valorisation of Vietnamese Rice Straw Waste: Catalytic Aqueous Phase Reforming of Hydrolysate from Steam Explosion to Platform Chemicals. Catalysts 2014, 4, 414-426.

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