Transformation of n-hexane over EUROPT-1

Fragments and C6 products on fresh and partially deactivated catalyst

Z. Paál, Helga Groeneweg, Julia Paál-Lukács

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The reactions of n-hexane have been studied on 6.3% Pt/SiO2 (EUROPT-1) at different hydrogen and n-hexane pressures, and at 543-633 K, over fresh catalyst and over catalysts deactivated by long runs. Turnover numbers are compared with literature data: the differences are attributed to hydrogen pressure effects. Deactivation influences first of all, selectivity. In addition, the 'depth' and 'pattern' of hydrogenolysis have been determined. At low temperature multiple splitting seems to be favoured. Isomerization gives predominantly 3-methylpentane. At medium temperatures, isomerization, C5-cyclization and internal splitting prevail; their ratio is controlled by the hydrogen pressure. The ratio of 2-methylpentane to 3-methylpentane is related to the ratio of internal to terminal rupture. Terminal splitting prevails at highest temperature. Aromatization increases with temperature but seems to be independent of the other reactions. The results are interpreted in terms of three different surface states. These correspond to Pt-H, Pt-C-H and Pt-C under increasing severity of conditions.

Original languageEnglish
Pages (from-to)3159-3166
Number of pages8
JournalJournal of the Chemical Society - Faraday Transactions
Volume86
Issue number18
DOIs
Publication statusPublished - 1990

Fingerprint

fragments
catalysts
Hydrogen
isomerization
Catalysts
hydrogen
products
Isomerization
hydrogenolysis
pressure effects
Aromatization
deactivation
Temperature
Hydrogenolysis
Pressure effects
Cyclization
Surface states
selectivity
temperature
n-hexane

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Transformation of n-hexane over EUROPT-1 : Fragments and C6 products on fresh and partially deactivated catalyst. / Paál, Z.; Groeneweg, Helga; Paál-Lukács, Julia.

In: Journal of the Chemical Society - Faraday Transactions, Vol. 86, No. 18, 1990, p. 3159-3166.

Research output: Contribution to journalArticle

@article{c0461455880745c79e216c566b5a616f,
title = "Transformation of n-hexane over EUROPT-1: Fragments and C6 products on fresh and partially deactivated catalyst",
abstract = "The reactions of n-hexane have been studied on 6.3{\%} Pt/SiO2 (EUROPT-1) at different hydrogen and n-hexane pressures, and at 543-633 K, over fresh catalyst and over catalysts deactivated by long runs. Turnover numbers are compared with literature data: the differences are attributed to hydrogen pressure effects. Deactivation influences first of all, selectivity. In addition, the 'depth' and 'pattern' of hydrogenolysis have been determined. At low temperature multiple splitting seems to be favoured. Isomerization gives predominantly 3-methylpentane. At medium temperatures, isomerization, C5-cyclization and internal splitting prevail; their ratio is controlled by the hydrogen pressure. The ratio of 2-methylpentane to 3-methylpentane is related to the ratio of internal to terminal rupture. Terminal splitting prevails at highest temperature. Aromatization increases with temperature but seems to be independent of the other reactions. The results are interpreted in terms of three different surface states. These correspond to Pt-H, Pt-C-H and Pt-C under increasing severity of conditions.",
author = "Z. Pa{\'a}l and Helga Groeneweg and Julia Pa{\'a}l-Luk{\'a}cs",
year = "1990",
doi = "10.1039/FT9908603159",
language = "English",
volume = "86",
pages = "3159--3166",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "18",

}

TY - JOUR

T1 - Transformation of n-hexane over EUROPT-1

T2 - Fragments and C6 products on fresh and partially deactivated catalyst

AU - Paál, Z.

AU - Groeneweg, Helga

AU - Paál-Lukács, Julia

PY - 1990

Y1 - 1990

N2 - The reactions of n-hexane have been studied on 6.3% Pt/SiO2 (EUROPT-1) at different hydrogen and n-hexane pressures, and at 543-633 K, over fresh catalyst and over catalysts deactivated by long runs. Turnover numbers are compared with literature data: the differences are attributed to hydrogen pressure effects. Deactivation influences first of all, selectivity. In addition, the 'depth' and 'pattern' of hydrogenolysis have been determined. At low temperature multiple splitting seems to be favoured. Isomerization gives predominantly 3-methylpentane. At medium temperatures, isomerization, C5-cyclization and internal splitting prevail; their ratio is controlled by the hydrogen pressure. The ratio of 2-methylpentane to 3-methylpentane is related to the ratio of internal to terminal rupture. Terminal splitting prevails at highest temperature. Aromatization increases with temperature but seems to be independent of the other reactions. The results are interpreted in terms of three different surface states. These correspond to Pt-H, Pt-C-H and Pt-C under increasing severity of conditions.

AB - The reactions of n-hexane have been studied on 6.3% Pt/SiO2 (EUROPT-1) at different hydrogen and n-hexane pressures, and at 543-633 K, over fresh catalyst and over catalysts deactivated by long runs. Turnover numbers are compared with literature data: the differences are attributed to hydrogen pressure effects. Deactivation influences first of all, selectivity. In addition, the 'depth' and 'pattern' of hydrogenolysis have been determined. At low temperature multiple splitting seems to be favoured. Isomerization gives predominantly 3-methylpentane. At medium temperatures, isomerization, C5-cyclization and internal splitting prevail; their ratio is controlled by the hydrogen pressure. The ratio of 2-methylpentane to 3-methylpentane is related to the ratio of internal to terminal rupture. Terminal splitting prevails at highest temperature. Aromatization increases with temperature but seems to be independent of the other reactions. The results are interpreted in terms of three different surface states. These correspond to Pt-H, Pt-C-H and Pt-C under increasing severity of conditions.

UR - http://www.scopus.com/inward/record.url?scp=0000472428&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000472428&partnerID=8YFLogxK

U2 - 10.1039/FT9908603159

DO - 10.1039/FT9908603159

M3 - Article

VL - 86

SP - 3159

EP - 3166

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 18

ER -