Heterogeneous Oxidation of 2-Octanol on 5 % Pt-1 % Bi/Carbon Catalyst

HN Mounzer; Joseph Wood; H Stitt

doi:10.1016/J.CES.2009.05.050

Heterogeneous Oxidation of 2-Octanol on 5 % Pt-1 % Bi/Carbon Catalyst

HN Mounzer, Joseph Wood, H Stitt

Chemical Engineering

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Abstract

The low activity of 5%Pt-1%Bi/Carbon for the oxidation of 2-octanol at atmospheric pressure and 343 K was investigated. Using solvents such as heptane and p-xylene. it was shown that the reaction rates decrease dramatically shortly after the start of the reaction due to poisoning by product adsorption. Hence this work investigates the effect of using different solvent mixtures on the oxidation reaction of 2-octanol with 5%Pt-1%Bi/Carbon. Mixtures with different volumetric ratios of heptane and dioxane were investigated to find the best composition capable of effectively removing the adsorbed amphiphilic ketone. It is apparent that the reaction rate is correlated with the adsorption coefficient of ketone on the catalyst, such that the maximum reaction rate occurs at the lowest ketone adsorption coefficient, corresponding to a concentration of 16-18%v/v dioxane. A model based on a Langmuir-Hinshelwood mechanism has been successfully fitted to the experimental rates. (C) 2009 Elsevier Ltd. All rights reserved.

Original language	English
Journal	Chemical Engineering Science
DOIs	https://doi.org/10.1016/J.CES.2009.05.050
Publication status	Published - 1 Jan 2009

Keywords

Batch
Desorption
Kinetics
Adsorption
Catalyst deactivation
Catalysis

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10.1016/J.CES.2009.05.050

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title = "Heterogeneous Oxidation of 2-Octanol on 5 % Pt-1 % Bi/Carbon Catalyst",

abstract = "The low activity of 5%Pt-1%Bi/Carbon for the oxidation of 2-octanol at atmospheric pressure and 343 K was investigated. Using solvents such as heptane and p-xylene. it was shown that the reaction rates decrease dramatically shortly after the start of the reaction due to poisoning by product adsorption. Hence this work investigates the effect of using different solvent mixtures on the oxidation reaction of 2-octanol with 5%Pt-1%Bi/Carbon. Mixtures with different volumetric ratios of heptane and dioxane were investigated to find the best composition capable of effectively removing the adsorbed amphiphilic ketone. It is apparent that the reaction rate is correlated with the adsorption coefficient of ketone on the catalyst, such that the maximum reaction rate occurs at the lowest ketone adsorption coefficient, corresponding to a concentration of 16-18%v/v dioxane. A model based on a Langmuir-Hinshelwood mechanism has been successfully fitted to the experimental rates. (C) 2009 Elsevier Ltd. All rights reserved.",

keywords = "Batch, Desorption, Kinetics, Adsorption, Catalyst deactivation, Catalysis",

author = "HN Mounzer and Joseph Wood and H Stitt",

year = "2009",

month = jan,

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doi = "10.1016/J.CES.2009.05.050",

language = "English",

journal = "Chemical Engineering Science",

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TY - JOUR

T1 - Heterogeneous Oxidation of 2-Octanol on 5 % Pt-1 % Bi/Carbon Catalyst

AU - Mounzer, HN

AU - Wood, Joseph

AU - Stitt, H

PY - 2009/1/1

Y1 - 2009/1/1

N2 - The low activity of 5%Pt-1%Bi/Carbon for the oxidation of 2-octanol at atmospheric pressure and 343 K was investigated. Using solvents such as heptane and p-xylene. it was shown that the reaction rates decrease dramatically shortly after the start of the reaction due to poisoning by product adsorption. Hence this work investigates the effect of using different solvent mixtures on the oxidation reaction of 2-octanol with 5%Pt-1%Bi/Carbon. Mixtures with different volumetric ratios of heptane and dioxane were investigated to find the best composition capable of effectively removing the adsorbed amphiphilic ketone. It is apparent that the reaction rate is correlated with the adsorption coefficient of ketone on the catalyst, such that the maximum reaction rate occurs at the lowest ketone adsorption coefficient, corresponding to a concentration of 16-18%v/v dioxane. A model based on a Langmuir-Hinshelwood mechanism has been successfully fitted to the experimental rates. (C) 2009 Elsevier Ltd. All rights reserved.

AB - The low activity of 5%Pt-1%Bi/Carbon for the oxidation of 2-octanol at atmospheric pressure and 343 K was investigated. Using solvents such as heptane and p-xylene. it was shown that the reaction rates decrease dramatically shortly after the start of the reaction due to poisoning by product adsorption. Hence this work investigates the effect of using different solvent mixtures on the oxidation reaction of 2-octanol with 5%Pt-1%Bi/Carbon. Mixtures with different volumetric ratios of heptane and dioxane were investigated to find the best composition capable of effectively removing the adsorbed amphiphilic ketone. It is apparent that the reaction rate is correlated with the adsorption coefficient of ketone on the catalyst, such that the maximum reaction rate occurs at the lowest ketone adsorption coefficient, corresponding to a concentration of 16-18%v/v dioxane. A model based on a Langmuir-Hinshelwood mechanism has been successfully fitted to the experimental rates. (C) 2009 Elsevier Ltd. All rights reserved.

KW - Batch

KW - Desorption

KW - Kinetics

KW - Adsorption

KW - Catalyst deactivation

KW - Catalysis

U2 - 10.1016/J.CES.2009.05.050

DO - 10.1016/J.CES.2009.05.050

M3 - Article

SN - 1873-4405

JO - Chemical Engineering Science

JF - Chemical Engineering Science

ER -

Heterogeneous Oxidation of 2-Octanol on 5 % Pt-1 % Bi/Carbon Catalyst

Abstract

Keywords

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