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<strong>Conversion of ethanol to higher alcohols on Ni/MxOy-Al2O3 (M=La, Ce, Zr, Mg and Ti) catalysts: Influence of support characteristics</strong>

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Title Statement <strong>Conversion of ethanol to higher alcohols on Ni/MxOy-Al2O3 (M=La, Ce, Zr, Mg and Ti) catalysts: Influence of support characteristics</strong>
 
Added Entry - Uncontrolled Name Rathinasamy, Vinayagamoorthi ; Department of Chemistry Anna University Chennai 600025
Kandasamy, Thirunavukkarasu ; National Centre for Catalysis Research Indian Institute of Technology Madras Chennai 600036
Konda R, Krishnamurthy ; National Centre for Catalysis Research Indian Institute of Technology Madras Chennai 600036
Balasubramanian, Viswanathan ; National Centre for Catalysis Research Indian Institute of Technology Madras Chennai 60003
Kannan, Shanthi ; Department of Chemistry Anna University Chennai 600025
Department of Science and Technology, Govt.of India
 
Uncontrolled Index Term Acidity; Basicity;Butanol; C4+ alcohols; Ethanol conversion; Heterogeneous catalysts; High Selectivity; Metal function; Nickel-alumina; Oxide promoters
 
Summary, etc. <span>A new series of alumina supported nickel (8% w/w) catalysts, modified with promoters, La</span><span>2</span><span>O</span><span>3</span><span>, CeO</span><span>2</span><span>, ZrO</span><span>2</span><span>, MgO and TiO</span><span>2</span><span>, highly active for the conversion of ethanol to butanol and higher alcohols, at 200°C-220°C, in batch mode, under autogenous pressure, has been investigated. XRD and XPS results indicate the presence of metallic Ni and Ni aluminate as the active phases. H</span><span>2</span><span>-TPR studies reveal that the introduction of promoters improves nickel dispersion, reducibility and moderates the metal-support interactions.TPD of ammonia and CO</span><span>2</span><span> studies establish the strong influence of the promoter oxides on the strength and population of acidic and basic sites. Ethanol conversion at 200°C varies in a narrow range, 36-42%. CeO</span><span>2</span><span> and MgO modified catalysts display maximum selectivity towards butanol (48%) and higher alcohols, (81% and 75%) in comparison with the catalyst based on pristine alumina (28.9% and 40.5%). While the selectivity for butanol and higher alcohols is governed by the basicity of the catalysts, both metal function and basicity are required to drive ethanol conversion. Moderation of acidity helps in minimizing the formation of ethylene and other gaseous products. Analysis of used catalyst indicates that the structural and active phase characteristics are retained during use.</span>
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2021-03-22 13:54:27
 
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http://op.niscair.res.in/index.php/IJCT/article/view/39104
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 28, ##issue.no## 1 (2021): Indian Journal of Chemical Technology
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCT/article/download/39104/465521663
http://op.niscair.res.in/index.php/IJCT/article/download/39104/465521665
http://op.niscair.res.in/index.php/IJCT/article/download/39104/465521666
http://op.niscair.res.in/index.php/IJCT/article/download/39104/465521667