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나노물질 및 화학반응 연구단
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n-Heptane hydroisomerization over Pt/MFI zeolite nanosheets: Effects of zeolite crystal thickness and platinum location

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Title
n-Heptane hydroisomerization over Pt/MFI zeolite nanosheets: Effects of zeolite crystal thickness and platinum location
Author(s)
Jeongnam Kim; Wookdong Kim; Yongbeom Seo; Jeong-Chul Kim; Ryong Ryoo
Publication Date
2013-05
Journal
JOURNAL OF CATALYSIS, v.301, no., pp.187 - 197
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Abstract
Platinum was supported on MFI-type (ZSM-5) zeolites with various crystal thicknesses ranging from 300 to 2 nm (i.e., from bulk crystal to nanosheet). Two series of Pt/MFI were prepared by the ion exchange of PtðNH3Þ2þ4 and the impregnation of colloidal Pt nanoparticles. The ion exchange yielded Pt nanoparticles that were supported inside zeolite pores, whereas the impregnation yielded Pt nanoparticles supported exclusively on the external crystal surfaces. The two series of Pt/MFI were used as catalysts for the hydroisomerization of n-heptane to investigate the effects of zeolite crystal thickness and Pt location. This research showed that the product selectivity to branched isomers could be significantly improved by decreasing zeolite crystal thickness to nanosheets. The selectivity improvement was attributed to short diffusion path lengths for branched products to escape before cracking.
URI
https://pr.ibs.re.kr/handle/8788114/1330
ISSN
0021-9517
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
10_IBS CA1201_J.Catal._301_187-n-Heptane hydroisomerization.pdfDownload

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