摘要
The activity of Lewis (Nb2O5) and Br nsted (Amberlyst 70) acid catalysts for the cyclodehydration of xylose to furfural was studied. The nature of the acidity resulted in significant changes in the reaction mechanism. Lewis acid sites promote the formation of xylulose, while Br nsted acid sites are required to further dehydrate the sugar to furfural. Amberlyst 70 in water/toluene at 175 ℃ showed lower activity but gave a higher furfural yield. Using N2 as the stripping agent considerably improved the furfural yield and product purity in the stripped stream. Catalyst stability was also studied.
The activity of Lewis （Nb2O5） and Br nsted （Amberlyst 70） acid catalysts for the cyclodehydration of xylose to furfural was studied. The nature of the acidity resulted in significant changes in the reaction mechanism. Lewis acid sites promote the formation of xylulose, while Br nsted acid sites are required to further dehydrate the sugar to furfural. Amberlyst 70 in water/toluene at 175 ℃ showed lower activity but gave a higher furfural yield. Using N2 as the stripping agent considerably improved the furfural yield and product purity in the stripped stream. Catalyst stability was also studied.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2013年第7期1402-1406,共5页
基金
supported by funds from the Spanish Ministerio de Economíay Competitividad(CTQ‐2012‐38204‐C03‐03 and ENE2009‐12743‐C04‐03)
from the Gobierno Vasco(Programa de Formación de Personal Investigador del Departamento de Educación,Universidades e Investigación)
the Junta de Andalucía(P09‐FQM‐5070) for financial support
关键词
环化脱水
酸催化剂
刘易斯
糠醛
木糖
Br
氮气
大孔树脂
Lewis acid
Br nsted acid
Reaction mechanism
Xylose dehydration
Furfural
Nitrogen stripping
