Investigation of Active Metal Species Formation in Pd-Promoted Sulfated Zirconia Isomerization Catalyst

Investigation of Active Metal Species Formation in Pd-Promoted Sulfated Zirconia Isomerization Catalyst Full article

Journal

Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875

Output data

Year: 2010, Volume: 387, Number: 1-2, Pages: 5-12 Pages count : 8 DOI: 10.1016/j.apcata.2010.07.052

Tags

Isomerization catalyst, Metal function, Palladium, Sulfated Zirconia

Authors

Belskaya Olga B. ^1,2 , Danilova Irina G. ³ , Kazakov Maxim O. ¹ , Gulyaeva Tatyana I. ¹ , Kibis Lidiya S. ³ , Boronin Andrey I. ^3,4 , Lavrenov Alexander V. ¹ , Likholobov Vladimir A. ^1,2

Affiliations

1	Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences
2	Omsk State Technical University
3	Federal Research Center Boreskov Institute of Catalysis
4	Novosibirsk State University

The state of palladium in Pd/SO42−–ZrO2 (Pd/SZ) isomerization catalyst was investigated by the temperature-programmed reduction (TPR), chemisorption technique, infrared spectroscopy of adsorbed carbon monoxide (FTIRS), X-ray photoelectron spectroscopy (XPS), diffuse-reflectance UV–vis spectroscopy (UV–vis DRS), and benzene hydrogenation as a test reaction. It has been stated that reduction temperature has a great impact on the metal function of Pd-promoted sulfated zirconia catalyst. Metal centers are formed at about 30–70 °C and characterized by high palladium dispersion and activity in benzene hydrogenation. At temperatures above 200 °C, intensive sulfate decomposition occurs and products of sulfate reduction poison the metal function of the catalyst. According to XPS and FTIRS study, palladium particles in the poisoned samples are only partly oxidized, but the main part is presented by metallic phase without large amount of PdS. Reduction of Pd-containing catalyst at 150 °C (instead of 250 °C) leads to higher conversion and 2,2-dimethylbutane yield in acid-catalyzed reaction of n-hexane isomerization. Higher isomerization activity in this case is provided by prevention of active sulfate species decomposition due to the capability of palladium metallic particles formation at low reduction temperatures.

Belskaya O.B. , Danilova I.G. , Kazakov M.O. , Gulyaeva T.I. , Kibis L.S. , Boronin A.I. , Lavrenov A.V. , Likholobov V.A.
Investigation of Active Metal Species Formation in Pd-Promoted Sulfated Zirconia Isomerization Catalyst
Applied Catalysis A: General. 2010. V.387. N1-2. P.5-12. DOI: 10.1016/j.apcata.2010.07.052 WOS Scopus РИНЦ ANCAN OpenAlex

Published print:

Oct 19, 2010

Web of science:	WOS:000283618100002
Scopus:	2-s2.0-78149414575
Elibrary:	16679813
Chemical Abstracts:	2010:1208584
Chemical Abstracts (print):	153:534195
OpenAlex:	W1995909692

DB	Citing
Web of science	25
Scopus	24
Elibrary	24
OpenAlex	26