An UV-Vis spectroscopic study on carbenium ions formed on HY-FAU zeolite upon the adsorption of various hydrocarbons

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

It was shown that adsorbed hydrogen-rich carbonaceous residues could be formed on zeolites, but, when the temperature was not too high, they were typical only for unsaturated hydrocarbons. The overlayer then mainly contained alkenyl carbenium ions of various length. They were detected on the zeolite surface by UV-Vis spectroscopy. In the formation of these ions both Brønsted and Lewis acid centres played significant role. The unsaturated carbenium ions provided additional Lewis acid sites participating in hydride ion abstraction. The formation of alkenyl carbenium ions started at temperature as low as 298 K for butadiene. When n-butane, a saturated hydrocarbon, was the model, adsorbed hydrogen-rich carbonaceous residues were not found even at adsorption temperature as high as 473 K.

Original languageEnglish
Pages (from-to)331-334
Number of pages4
JournalJournal of Molecular Structure
Volume651-653
DOIs
Publication statusPublished - Jun 1 2003

Fingerprint

Zeolites
Hydrocarbons
Adsorption
hydrocarbons
Ions
adsorption
Lewis Acids
ions
Temperature
Hydrogen
acids
hydrogen
butadiene
butanes
Ultraviolet spectroscopy
Hydrides
zeolites
alkanes
hydrides
temperature

Keywords

  • 1-Butene
  • 2,3-Butadiene
  • Alkenyl carbenium ions
  • HY-FAU zeolite
  • Isobutene
  • n-Butane
  • UV-Vis spectroscopy

ASJC Scopus subject areas

  • Structural Biology
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

@article{6e88154bc8234b35b63f3cfd1914e5ea,
title = "An UV-Vis spectroscopic study on carbenium ions formed on HY-FAU zeolite upon the adsorption of various hydrocarbons",
abstract = "It was shown that adsorbed hydrogen-rich carbonaceous residues could be formed on zeolites, but, when the temperature was not too high, they were typical only for unsaturated hydrocarbons. The overlayer then mainly contained alkenyl carbenium ions of various length. They were detected on the zeolite surface by UV-Vis spectroscopy. In the formation of these ions both Br{\o}nsted and Lewis acid centres played significant role. The unsaturated carbenium ions provided additional Lewis acid sites participating in hydride ion abstraction. The formation of alkenyl carbenium ions started at temperature as low as 298 K for butadiene. When n-butane, a saturated hydrocarbon, was the model, adsorbed hydrogen-rich carbonaceous residues were not found even at adsorption temperature as high as 473 K.",
keywords = "1-Butene, 2,3-Butadiene, Alkenyl carbenium ions, HY-FAU zeolite, Isobutene, n-Butane, UV-Vis spectroscopy",
author = "I. Kiricsi and I. P{\'a}link{\'o} and T. Koll{\'a}r",
year = "2003",
month = "6",
day = "1",
doi = "10.1016/S0022-2860(02)00648-8",
language = "English",
volume = "651-653",
pages = "331--334",
journal = "Journal of Molecular Structure",
issn = "0022-2860",
publisher = "Elsevier",

}

TY - JOUR

T1 - An UV-Vis spectroscopic study on carbenium ions formed on HY-FAU zeolite upon the adsorption of various hydrocarbons

AU - Kiricsi, I.

AU - Pálinkó, I.

AU - Kollár, T.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - It was shown that adsorbed hydrogen-rich carbonaceous residues could be formed on zeolites, but, when the temperature was not too high, they were typical only for unsaturated hydrocarbons. The overlayer then mainly contained alkenyl carbenium ions of various length. They were detected on the zeolite surface by UV-Vis spectroscopy. In the formation of these ions both Brønsted and Lewis acid centres played significant role. The unsaturated carbenium ions provided additional Lewis acid sites participating in hydride ion abstraction. The formation of alkenyl carbenium ions started at temperature as low as 298 K for butadiene. When n-butane, a saturated hydrocarbon, was the model, adsorbed hydrogen-rich carbonaceous residues were not found even at adsorption temperature as high as 473 K.

AB - It was shown that adsorbed hydrogen-rich carbonaceous residues could be formed on zeolites, but, when the temperature was not too high, they were typical only for unsaturated hydrocarbons. The overlayer then mainly contained alkenyl carbenium ions of various length. They were detected on the zeolite surface by UV-Vis spectroscopy. In the formation of these ions both Brønsted and Lewis acid centres played significant role. The unsaturated carbenium ions provided additional Lewis acid sites participating in hydride ion abstraction. The formation of alkenyl carbenium ions started at temperature as low as 298 K for butadiene. When n-butane, a saturated hydrocarbon, was the model, adsorbed hydrogen-rich carbonaceous residues were not found even at adsorption temperature as high as 473 K.

KW - 1-Butene

KW - 2,3-Butadiene

KW - Alkenyl carbenium ions

KW - HY-FAU zeolite

KW - Isobutene

KW - n-Butane

KW - UV-Vis spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=0038746910&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038746910&partnerID=8YFLogxK

U2 - 10.1016/S0022-2860(02)00648-8

DO - 10.1016/S0022-2860(02)00648-8

M3 - Article

AN - SCOPUS:0038746910

VL - 651-653

SP - 331

EP - 334

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

SN - 0022-2860

ER -