Miller S.F., Friedrich H.B., Holzapfel C.W., Dasireddy V.D.B.C.
School of Chemistry and Physics, University of KwaZulu Natal, Private bag X54001, Durban, South Africa; Department of Chemistry, University of Johannesburg, Auckland Park, Johannesburg, South Africa
Miller, S.F., School of Chemistry and Physics, University of KwaZulu Natal, Private bag X54001, Durban, South Africa; Friedrich, H.B., School of Chemistry and Physics, University of KwaZulu Natal, Private bag X54001, Durban, South Africa; Holzapfel, C.W., Department of Chemistry, University of Johannesburg, Auckland Park, Johannesburg, South Africa; Dasireddy, V.D.B.C., School of Chemistry and Physics, University of KwaZulu Natal, Private bag X54001, Durban, South Africa
The competitive hydrogenation between 1-octene and octanal has been investigated with a ≈5% palladium on alumina catalyst prepared in situ with the following organic modifiers: pyridine, 1-methylimidazole, 1,3-dimethylimidazole methylsulfate, 1,3-dimethylimidazole bis(trifluoromethylsulfonyl)imide and methyltri-sec-butylphosphonium methylsulfate. The results of these investigations indicate that the ionic liquid modifiers have significant and specific effects on catalytic performance, for example, certain systems can completely suppress octanal conversion. In addition, analytical techniques reveal that the matrix and quantity of organic species on the used catalysts are different if different ionic liquids are used as modifiers. Surface studies also reveal that the modifiers have a noticeable effect on the crystallite size and chemisorption properties of the catalysts. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.