Justine Harmel

Postdoctoral Fellow

Employed since: September 2017
Room: 4.76

Bifunctional metal-acid catalysts for selective hydrocarbon conversion

In the petroleum industry, one of the key reaction is the hydroisomerisation of linear alkanes into branched alkanes products that have a higher octane value and are therefore more valuable. [1] This reaction is typically performed involving a bifunctional catalyst including a metallic site and an acid site. The intimacy criterion between this two actives sites is a critical parameter for activity and selectivity. [2] Although it was generally admitted that a close proximity was required, it has been shown recently, that a nanoscale proximity between the two type of active sites can be detrimental for the selectivity. [3] The relationship between the metal site and the acid site will be studied in further detail.
[1] Weyda, H.; Köhler, E. Modern Refining Concepts - An Update on Naphtha-Isomerization to Modern Gasoline Manufacture. Catal. Today 2003, 81 (1), 51–55.
[2] Guisnet, M. “Ideal” bifunctional Catalysis over Pt-Acid Zeolites. Catal. Today 2013, 218–219, 123–134.
[3] Zecevic, J.; Vanbutsele, G.; de Jong, K. P.; Martens, J. A. Nanoscale Intimacy in Bifunctional Catalysts for Selective Conversion of Hydrocarbons. Nature 2015, 528 (7581), 245–248.