Esterification of levulinic acid to ethyl levulinate over bimodal micro–mesoporous H/BEA zeolite derivatives

A series of bimodal micro–mesoporous H/BEA zeolite derivatives were prepared by the post-synthesis modification of H/BEA zeolite by NaOH (0.05M–1.2M) treatment. Samples were characterized by powder XRD, low temperature nitrogen adsorption/desorption, temperature programmed desorption of ammonia and...

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Bibliographic Details
Published in:Catalysis communications 2014, Vol.43, p.188-191
Main Authors: Patil, C.R., Niphadkar, P.S., Bokade, V.V., Joshi, P.N.
Format: Article
Language:English
Subjects:
Esterification
Ethyl levulinate
H/BEA zeolite
Mesoporosity
Post-synthesis modification
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Summary:A series of bimodal micro–mesoporous H/BEA zeolite derivatives were prepared by the post-synthesis modification of H/BEA zeolite by NaOH (0.05M–1.2M) treatment. Samples were characterized by powder XRD, low temperature nitrogen adsorption/desorption, temperature programmed desorption of ammonia and ICP. The mesopore formation was found to play a crucial role in liquid phase esterification of levulinic acid with ethanol. The enhanced catalytic activity of a bimodal micro–mesoporous H/BEA zeolite derivative (H/BEA0.10) prepared by treatment with 0.1M NaOH can be mainly attributed to the high mesoporosity coupled with better preserved crystallinity and acidic properties. [Display omitted] •NaOH treatment to H/BEA zeolite yielded its bimodal micro–mesoporous derivative.•Enhanced esterification of renewable levulinic acid (LA) to ethyl levulinate (EL).•H/BEA0.10 exhibited maximum LA conversion of 40 % with 98 % EL selectivity.•Mesoporosity, crystallinity & acidity of zeolite play crucial role in EL synthesis.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2013.10.006