Direct ethanol condensation to diethyl acetal in the vapour phase at atmospheric pressure over CuNP/SBA-15 catalysts

Of the biomass valorization technologies, bioethanol production and its selective conversion to diethyl acetal is of utmost importance to meet the increasing demand for bio-fuel additives. Direct synthesis of diethyl acetal in a single step from bioethanol using SBA-15-supported copper nanoparticle...

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Bibliographic Details
Published in:New journal of chemistry 2019-06, Vol.43 (25), p.13-111
Main Authors: Paleti, Gidyonu, Peddinti, Nagaiah, Gajula, Naveen, Kadharabenchi, Vasikerappa, Rao, Kamaraju Seetha Rama, Burri, David Raju
Format: Article
Language:English
Subjects:
Acetaldehyde
Ammonia
Catalysis
Catalysts
Chemisorption
Condensates
Copper
Ethanol
Fuel additives
Nanoparticles
Organic chemistry
Oxidation
Selectivity
Vapor phases
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Summary:Of the biomass valorization technologies, bioethanol production and its selective conversion to diethyl acetal is of utmost importance to meet the increasing demand for bio-fuel additives. Direct synthesis of diethyl acetal in a single step from bioethanol using SBA-15-supported copper nanoparticle (CuNP/SBA-15) catalysts without using hydrogen acceptors and high pressure has been achieved as an alternative to the age-old two-step process via (i) partial oxidation of ethanol to acetaldehyde and (ii) acetaldehyde acetalization with ethanol. The prepared CuNP/SBA-15 catalysts with the SBA-15 support and copper nitrate (Cu (NO 3 ) 2 ·H 2 O) were characterized by using N 2 adsorption, SEM, TEM, XRD, FT-IR, TPD of NH 3 , H 2 -TPR and N 2 O pulse chemisorption techniques. Analysis of the results showed the physico-chemical characterestics of these catalysts responsible for the acceptorless partial oxidation of ethanol to acetaldehyde and its acetalization with ethanol to yield diethyl acetal with high selectivity. Of the biomass valorization technologies, bioethanol production and its selective conversion to diethyl acetal is of utmost importance to meet the increasing demand for bio-fuel additives.
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj02287b