ISOMERIZATION OF n-HEXANE ON Pd-CATALYSTS ON PILLARED ALUMINUM-ZIRCONIUM MONTMORILLONITE

Year 2020, Volume: 4 Issue: 4, 12 - 20, 23.10.2020

Layla Djumabaeva

Abstract

Pd-catalysts supported on
pillared aluminum-zirconium Tagan (Kazakhstan) montmorillonite (ММ) from PdCl₂
and Pd-sol were
synthesized and their textural, acidic and catalytic properties in the
isomerization of n-hexane were investigated, depending on
content of the active metal and the temperature. It was shown that the activity
and selectivity of Pd catalysts in the isomerization of n-hexane change little
with decreasing of palladium content at different temperatures. On a 0.35% Pd-catalyst
at 400°C, the content of C₆ isomers is 46.0%, with a decrease of the
palladium content to 0.1%, the isohexanes yield is 44.0% at a temperature of
350°C. The C₆-isomers yield on the Pd-catalyst from sol is 47%, while
on Pd it is 46%. A slightly increased isomerization activity of Pd-sol
catalysts can be explained by a large number of average acid sites found on
this catalyst as compared with the results obtained on the Pd-catalyst from PdCl₂.
The particle size of palladium in a 0.35% Pd/AlZrNaHMM +HM-catalyst found for
two different areas of the catalyst varies from 2.7 to 5.2 nm.

Keywords

isomerization

Supporting Institution

Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan

Project Number

PTF BR05236739

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