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

Catalysts

Cao Huong Giang²  Amin Osatiashtiani⁴  Vannia Cristina dos Santos³  Adam F. Lee⁴  David R. Wilson¹  Keith W. Waldron¹  Karen Wilson⁴ 

[1] The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK; E-Mails:;Vietnam Academy of Agricultural Science, Vinh Quynh, Thanh Tri, Ha Noi, Vietnam; E-Mail:;Laboratory of Bioinorganic Chemistry and Catalysis, Federal University of Paraná, CP 19081, CEP 81531-990, Curitiba, Paraná, Brazil; E-Mail:;European Bioenergy Research Institute, School of Engineering and Applied Sciences, Aston University, Birmingham B4 7ET, UK; E-Mail:

关键词: biomass;    solid acid;    zirconia;    glucose;    HMF;    tungstate;   

DOI  :  10.3390/catal4040414

来源: mdpi

【 摘 要 】

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 WO_x 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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.