AN Ran, KONG Pengfei, XU Guizhuan, et al. Preparation of ethyl levulinate from cellulose catalyzed by dealuminated USY molecular sieves supporting copper[J]. CIESC Journal, 2016, (11): 4643-4651.
AN Ran, KONG Pengfei, XU Guizhuan, et al. Preparation of ethyl levulinate from cellulose catalyzed by dealuminated USY molecular sieves supporting copper[J]. CIESC Journal, 2016, (11): 4643-4651.DOI: 10.11949/j.issn.0438-1157.20160699.
A dealuminated Y molecular sieves supporting copper (Cu-DUSY) catalyst was prepared by impregnation technique using Cu as metallic active ingredient and modified USY molecular sieves as carrier
which USY modification was dealuminated in non-buffered citric acid. Physicochemical characterization by XRD
FT-IR
BET
NH3-TPD
Py-IR and TG-DTA showed that the Cu-DUSY catalyst had excellent thermal stability and steady crystal structure. Cellulose alcoholysis catalyzed by Cu-DUSY yielded 48.2%(mol) of ethyl levulinate (EL) at 200℃ for 3 h. The recycled Cu-DUSY catalyst remained high activity with EL yield above 40%(mol) after being used four times.