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Ethanol condensation to butanol and higher alcohols over nickel and cobalt decorated CeO2-Al2O3 mixed oxide catalysts

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Title Ethanol condensation to butanol and higher alcohols over nickel and cobalt decorated CeO2-Al2O3 mixed oxide catalysts
 
Creator Vinayagamoorthi, R
Krishnamurthy, K R
Viswanathan, B
Shanthi, K
 
Subject Ethanol condensation
Guerbet alcohols
Co-Ni bimetallic catalysts
Hydrogenation
Ceria-alumina
 
Description 386-396
A new series of bimetallic Ni-Co catalysts, prepared by step wise substitution of Ni by Co, in mono metallic
Ni (8%)/ CeO2 -Al2O3, with the compositions of 6%Ni-2% Co, 4%Ni-4%Co, 2.5%Ni-5.5%Co and 8%Co, have been evaluated for conversion of ethanol to butanol and higher alcohols according to Guerbet alcohol chemistry. XRD, TPR and XPS studies reveal the formation of Ni-Co alloys at specific bimetallic compositions. Maximum reducibility is observed for the composition 4%Ni-4%Co, which also displays maximum ethanol conversion (55.1%) with C4+ alcohols selectivity of 50.2%, which are higher than those realized for mono metallic Ni and Co catalysts. Ni-Co alloys in bimetallic catalysts promote the crucial ethanol dehydrogenation and C4 and C4+ aldehydes hydrogenation steps in the Guerbet process, thereby increasing ethanol conversion and C4+ alcohol selectivity. Selection of bimetallic catalysts with optimum compositions seems to be one of strategies to improve ethanol conversion and selectivity for higher alcohols.
 
Date 2021-03-03T04:07:16Z
2021-03-03T04:07:16Z
2021-03
 
Type Article
 
Identifier 0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/56375
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJC-A Vol.60A(03) [March 2021]