High-pressure liquid phase hydroconversion of heptane/nonane mixtures on Pt/H-Y zeolite catalyst

Denayer, Joeri F. M. ; Ocakoglu, Refik A. ; Huybrechts, Ward ; Dejonckheere, Bruno ; Jacobs, Pierre ; Calero, Sofia ; Krishna, Rajamani ; Smit, Berend ; Barona, Gino V. ; Martens, Johan A. (2003) High-pressure liquid phase hydroconversion of heptane/nonane mixtures on Pt/H-Y zeolite catalyst Journal of Catalysis, 220 (1). pp. 66-73. ISSN 0021-9517

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0021-9517(03)00239-2

Abstract

The competitive hydroconversion of heptane and nonane molecules in their mixture was studied in a continuous flow, fixed-bed reactor filled with Pt/HY zeolite catalyst. Liquid-phase reaction conditions were established at reaction temperatures of 230, 250, and 270 °C by pressurizing the reactor at 100 bar. Hydrogen was supplied in an absorbed state with the liquid hydrocarbon feed. Under these liquid-phase reaction conditions, the apparent reaction rates of heptane and nonane were almost identical. In a similar experiment under vapor-phase conditions, nonane was much more reactive than heptane. The conversion data under liquid-phase conditions were analyzed with an adsorption-reaction model based on intrinsic kinetic parameters obtained from vapor-phase experiments. The model revealed that the enhanced reactivity of heptane in the liquid phase was due to its preferential adsorption. Simulation of the adsorption of the heptane/nonane mixture in the pores of zeolite Y with the configurational-bias Monte Carlo method confirmed the preferential adsorption of heptane in zeolite Y at high pressure. Under such conditions, in zeolite Y supercages the packing of the smaller heptane molecules is more favorable than that of the larger nonane molecules.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Hydrocracking; Alkane Mixtures; Molecular Competition; Pt/HY Zeolite; Liquid Phase; High Pressure; CBMC Simulation
ID Code:94137
Deposited On:05 Sep 2012 05:52
Last Modified:05 Sep 2012 05:52

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