Experimental and kinetic study of n-heptane isomerization on nanoporous Pt-(Re,Sn)/HZSM5-HMS catalysts

doi:10.1016/S1872-2067(15)61114-7

Abstract

Abstract:

Pt-(Sn,Re)/HZSM5-HMS catalysts were evaluated for n-heptane isomerization at 200-350℃. To characterize the catalyst, X-ray diffraction, X-ray fluorescene, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, temperature-programmed reduction of H₂, temperature-programmed desorption of NH₃, infrared spectroscopy of adsorbed pyridine, H₂ chemisorption, nitrogen adsorption-desorption, scanning electron microscopy and thermogravimetric analysis were performed. Kinetics of n-C₇ isomerization were investigated under various hydrogen and n-C₇ pressures, and the effects of reaction conditions on catalytic performance were studied. The results showed that biand trimetallic catalysts exhibit better performance than monometallic catalysts for this reaction. For example, a maximum i-C₇ selectivity(> 74%) and multibranched isomer selectivity(40%) were observed for Pt-Sn/HZSM5-HMS at 200℃.

Key words: Bimetallic catalyst, Trimetallic catalyst, n-Heptane isomerization, Selectivity, Multibranched isomer

N. Parsafard, M. H. Peyrovi, M. Rashidzadeh. Experimental and kinetic study of n-heptane isomerization on nanoporous Pt-(Re,Sn)/HZSM5-HMS catalysts[J]. Chinese Journal of Catalysis, 2016, 37(9): 1477-1486.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)61114-7

https://www.cjcatal.com/EN/Y2016/V37/I9/1477

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