Dehydroxylation of glycerol on nickel-containing catalysts: A method of utilization of glycerol in biodiesel production

This study aims to investigate NieMo/gAl 2 O 3 and NieLa/Zn-ZSM-5egAl 2 O 3 catalysts, which convert methyl esters into various compounds with a similar composition to those found in diesel fuels. The catalysts were synthesized by impregnation using two different routes and characterized by atomic absorption spectrometry, BrunauereEmmetteTeller, and scanning electron microscopy. The acid strength distribution indicates a relatively high concentration of weak acid centers for both materials. The disposal of the catalysts into the reactor system is an important factor for driving the process toward the desired reaction products. The hydrodeoxygenation becomes important and paraffins are formed as intermediaries when NieMo/gAl 2 O 3 is first disposed into the reactor, whereas hydrocracking is poor and the dehydrocyclization does not occur in the case of NieLa/Zn-ZSM-5egAl 2 O 3 as first layer. Triple-layered catalytic systems enhance the production of n-paraffins with high carbon number, mainly C17 and C18, which are important as diesel component. The effect of temperature was also studied and it was found that aromatics are mainly formed over double-layered catalytic systems by varying the temperature. In the case of triplelayered catalysts, the change in the product composition from saturated hydrocarbons with 12e18 carbon atoms to aromatics was observed by increasing the temperature from 420 to 445 C. An interesting finding by the addition of n-octane in the feed was observed and the considerable increase in C8 aromatics involved the dehydrocyclization that occurred faster than hydrocracking.

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Multilayered catalysts for fatty acid ester hydrotreatment into fuel range hydrocarbons

Dusescu¹,

Juganaru²,

Bomboş³

et al. 2017

Comptes Rendus. Chimie

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Dehydroxylation of glycerol on nickel-containing catalysts: A method of utilization of glycerol in biodiesel production

Cited by 1 publication

References 15 publications

Multilayered catalysts for fatty acid ester hydrotreatment into fuel range hydrocarbons

Multilayered catalysts for fatty acid ester hydrotreatment into fuel range hydrocarbons

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