期刊
MOLECULAR CATALYSIS
卷 466, 期 -, 页码 52-59出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2018.12.024
关键词
Furfural; gamma-Valerolactone; Tungstophosphoric acid; Transfer hydrogenation; beta-Zeolite
资金
- University Grants Commission (UGC), New Delhi, India
- RMIT, Australia
A series of metal oxide and tungstophosphoric acid (TPA) supported on beta-zeolite catalysts were prepared and evaluated for the one pot selective conversion of furfural (FA) to gamma-valerolactone (GVL) using transfer hydrogenation approach. The characterizations of the catalysts were derived from N-2 -adsorption, FT-IR, XRD, XPS and temperature programmed desorption (TPD) techniques. The acid and base sites in the catalysts were estimated by NH3 and CO2-TPD and FT-IR spectroscopy with pyridine and 2-propanol adsorption. Among the catalysts 20%ZrO2 with 5%TPA on beta-zeolite showed high activity with 85% GVL yield. The high Lewis acidic density along with basic sites are responsible for the outstanding catalytic activity of the catalyst. Based on product distribution and catalyst characteristics, a plausible mechanism was proposed. Different reaction parameters were also studied and optimum conditions were established. The catalyst was easily recovered and reused with consistent activity.
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