Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 186, Issue -, Pages 121-129Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2013.11.042
Keywords
D-Xylose; Furfural; Dehydration; Zeolite; ZSM-5
Categories
Funding
- Industrial Source Technology Development Programs of the Ministry of Knowledge Economy (MKE) of Korea [10032003]
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education [NRF-2009-0094046]
- Korea Institute of Industrial Technology(KITECH) [10032003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The continuous liquid-phase dehydration of D-xylose into furfural was examined over various zeolites (H-ferrierite, H-ZSM-5, H-mordenite, H-beta, and H-Y) having a similar surface area, external surface area, and amount of acid sites to determine the effects of zeolite structure on catalytic performance. Xylose conversion was proportional to the zeolite channel size, whereas the H-ZSM-5 zeolite showed the highest furfural selectivity due to shape-selectivity. In order to improve the catalytic activity, H-ZSM-5 zeolite was dealuminated or desilicated using an aqueous solution of HCl or NaOH, respectively. The prepared catalysts were characterized using N-2 physisorption, X-ray diffraction (XRD), solid-state Al-27 and Si-29 magic-angle spinning nuclear magnetic resonance (MAS/NMR) spectroscopy, temperature-programmed desorption of ammonia (NH3-TPD) and isopropylamine (IPA-TPD). Dealumination of H-ZSM-5 appeared to remove extra-framework Al species without a collapse of the crystalline zeolite framework, while desilication generated extra-framework Al species accompanied by destruction of the zeolite framework. Among the tested catalysts, dealuminated H-ZSM-5 showed the highest furfural selectivity. (C) 2013 Elsevier Inc. All rights reserved.
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