The importance of short range interactions in the development of acidic and catalytic properties of H, Na - MoR

I. Bankos, J. Valyon, D. Kalló

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Adsorption microcalorimetry and IR spectroscopy are used to study the nature, number, strength and accessibility of acid sites in H, Na-MoR samples, ion exchanged to different degrees. The differential molar adsorption heat and the number of ammonia molecules adsorbed are considered as a measure of the acid strength and of the number of acid site, respectively. Sanderson electronegativity model allows to predict the trends of the variation of the average acid strength with the chemical composition. The average differential heat of NH3 adsorption (q) and the stretching frequency of OH groups (v) are in linear correlation with the intermediate electronegativity (Sint.). Catalytic activities for the isomerization and disproportionation of m-xylene are in better and closer correlation with the number of acid sites of different strength and type than with the intermediate electronegativity (Sint.).

Original languageEnglish
Pages (from-to)213-222
Number of pages10
JournalCatalysis Today
Volume5
Issue number2
DOIs
Publication statusPublished - 1989

Fingerprint

Electronegativity
Acids
Adsorption
Xylene
Isomerization
Ammonia
Stretching
Infrared spectroscopy
Catalyst activity
Ions
Molecules
Chemical analysis
Hot Temperature

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

The importance of short range interactions in the development of acidic and catalytic properties of H, Na - MoR. / Bankos, I.; Valyon, J.; Kalló, D.

In: Catalysis Today, Vol. 5, No. 2, 1989, p. 213-222.

Research output: Contribution to journalArticle

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