Quantification of metal-acid balance in hydroisomerization catalysts: A step further toward catalyst design

Abstract : A methodology was developed to interpret the results of n-paraffins hydroisomerization over bifunctional catalysts based on two simple kinetic models used consecutively. Firstly, a macrokinetic model was used to obtain the corresponding turnover frequency over the acid sites and the maximum of C 16 isomer yield. Secondly, a dual-function model was used to correlate these catalytic descriptors to the ratio of metal to acid sites of the catalyst. To illustrate the methodology, Pt/HBEA and Pt/HUSY catalysts with different Pt loadings were evaluated. The impact of metal-acid balance on the catalytic turnover frequency and the maximal C 16 isomer yield were adequately captured for the bifunctional HUSY and HBEA catalysts. Moreover, the parameters of the dual-function model revealed to be intrinsic to the catalytic properties of the zeolite under the scope. This methodology is believed to be of interest for information-driven catalyst design for the hydroisomerization of n-paraffins.
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Submitted on : Tuesday, September 5, 2017 - 11:37:23 AM
Last modification on : Thursday, February 7, 2019 - 4:36:04 PM

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Pedro S. F. Mendes, João M. Silva, M. Filipa Ribeiro, Pascal Duchêne, Antoine Daudin, et al.. Quantification of metal-acid balance in hydroisomerization catalysts: A step further toward catalyst design. AIChE Journal, Wiley, 2017, 63 (7), pp.2864 - 2875. 〈10.1002/aic.15613〉. 〈hal-01581867〉

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