期刊
CATALYSIS LETTERS
卷 149, 期 1, 页码 215-227出版社
SPRINGER
DOI: 10.1007/s10562-018-2618-7
关键词
Levulinic acid; -Valerolactone; Hydrocyclisation; Transfer hydrocyclisation; Nickel; Reusability; Reaction mechanism; Continuous production
资金
- CSIR, New Delhi [OLP-0031, CSC-0123, MLP-0028]
Commercial 65% Ni/SiO2-Al2O3 (Ni/SA) catalyst was investigated for hydrocyclisation of levulinic acid (LA) to -valerolactone (Gvl) in presence of different hydrogen sources such as molecular hydrogen, isopropyl alcohol (IPA), and formic acid. At optimized reaction condition (200 degrees C, 10bar H-2 for 30min), the Ni/SA catalyst showed 100% yield of Gvl using molecular H-2 in tetrahydrofuran (THF) medium. The catalyst also exhibited 99% yield of Gvl in IPA through catalytic transfer hydrocyclisation of LA at 200 degrees C in 15min. Further, the hydrocyclisation was successfully demonstrated in continuous mode using molecular hydrogen for 20h time-on-stream which showed 98-99% conversion of LA with 100% selectivity of Gvl at optimized reaction condition in THF medium. [GRAPHICS] .
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