Influence of noble metals on the catalytic performance of Ni/TiO2 for Ethanol Guerbet condensation

Han, Xing; Li, Shuaiqi; Zhu, Xiaosong; An, Hualiang; Zhao, Xinqiang; Wang, Yanji

doi:10.1007/s11144-020-01899-1

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…In the previous work, we found that Ni–Cu/TiO 2 showed excellent catalytic performance for ethanol Guerbet condensation. So the Ni–Cu/TiO 2 catalyst was used to compare the reaction performance of ethanol Guerbet condensation and the integrated reaction with a molar ratio of ethanol/acetal of 20, and the results are shown in Table .…”

Section: Resultsmentioning

confidence: 94%

“…17 Ni−Cu/TiO 2 catalyst was prepared by an excessive impregnation method. 18 A total of 3.653 g of nickel nitrate hexahydrate and 0.037 g of copper nitrate was dissolved in 50 mL of deionized water. Then 6 g of TiO 2 powder was added into the mixed solution, and the mixture was stirred continuously at room temperature for 6 h. A light green solid was obtained after removing water by a rotary evaporation.…”

Section: Methodsmentioning

confidence: 99%

“…TiO 2 powder was prepared by a sol–gel method using tetrabutyl titanate as the titanium source . Ni–Cu/TiO 2 catalyst was prepared by an excessive impregnation method . A total of 3.653 g of nickel nitrate hexahydrate and 0.037 g of copper nitrate was dissolved in 50 mL of deionized water.…”

Section: Methodsmentioning

confidence: 99%

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Improvement of Ethanol Guerbet Condensation by Acetal Hydrolysis

Cui

et al. 2022

Ind. Eng. Chem. Res.

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The Guerbet condensation of bio-ethanol is a green route to the synthesis of n-butanol. However, this route suffers from its by-product water which not only affects adversely the condensation reaction performance, but also causes the deactivation of the catalyst. Hence, the water by-product should be removed. This goal is achieved by integrating the Guerbet condensation of ethanol with acetal hydrolysis in this work. First, the Guerbet condensation of ethanol and the integrated reaction of ethanol Guerbet condensation with acetal hydrolysis were thermodynamically analyzed. The results showed that acetal hydrolysis can promote the Guerbet condensation of ethanol. Then the performance of the two reaction systems was compared experimentally using Ni−Cu/TiO 2 catalyst. The selectivity of n-butanol reached 44.4% at an ethanol conversion of 47.9% in ethanol Guerbet condensation while the selectivity of n-butanol increased to 50.4% at an ethanol conversion of 50.2% in the integrated reaction with an ethanol/acetal molar ratio of 20. Finally, the two reaction systems were kinetically analyzed, and the results showed that acetal hydrolysis can lower the activation energy of the ethanol dehydrogenation step and acetaldehyde aldol self-condensation step, thus effectively promoting the Guerbet condensation of ethanol.

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Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%