期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 28, 期 3, 页码 710-716出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-010-0417-y
关键词
Dehydration; D-xylose; Furfural; Zeolite; Acidity
资金
- Ministry of Education, Science and Technology [2009-0094047]
- Ministry of Knowledge Economy (MKE) of Korea [10032003]
- Korea Institute of Industrial Technology(KITECH) [10032003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The liquid-phase dehydration of D-xylose into furfural was carried out over various H-zeolites-H-ferrierite, H-beta, H-ZSM-5, H-Y and H-mordenite-with various SiO2/Al2O3 molar ratios in different solvent systems: water, dimethyl sulfoxide (DMSO) and a mixture of water and toluene (water/toluene). For comparison, gamma-Al2O3 and silica-alumina were also examined. FT-IR spectroscopy after pyridine adsorption was conducted to probe the acidity of the H-zeolites. The D-xylose conversion and furfural yield generally decreased with increasing SiO2/Al2O3 molar ratio over the H-zeolites having the same crystal structure irrespective of the kind of solvent system. This is closely related to the accessible acid sites. In a comparison study using the three different solvent systems, the D-xylose conversion and furfural selectivity generally decreased in the following order: water/toluene > DMSO > water. In water and water/toluene, H-beta (25) showed the highest furfural selectivity at a similar D-xylose conversion among the tested zeolites. On the other hand, H-mordenite (20) showed the highest furfural selectivity at a similar D-xylose conversion in DMSO.
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