Effect of calcination temperature on characteristics of sulfated zirconia and its application as catalyst for isosynthesis

Journal article

Authors/Editors

NAVADOL LAOSIRIPOJANA

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Publication Details

Author list: Tangchupong N., Khaodee W., Jongsomjit B., Laosiripojana N., Praserthdam P., Assabumrungrat S.

Publisher: Elsevier

Publication year: 2010

Journal: Fuel Processing Technology (0378-3820)

Volume number: 91

Issue number: 1

Start page: 121

End page: 126

Number of pages: 6

ISSN: 0378-3820

eISSN: 1873-7188

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-71649108157&doi=10.1016%2fj.fuproc.2009.09.003&partnerID=40&md5=dd19f1b3f868edf3685ad35bb2357130

Languages: English-Great Britain (EN-GB)

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Abstract

The effect of catalyst calcination temperature (450 ฐC, 600 ฐC, and 750 ฐC) on catalytic performance of synthesized and commercial grade sulfated zirconia catalysts towards isosynthesis was studied. The characteristics of these catalysts were determined by using various techniques including BET surface area, XRD, NH3- and CO2-TPD, ESR, and XPS in order to relate the catalytic reactivity with their physical, chemical, and surface properties. It was found that, for both synthesized and commercial sulfated zirconia catalysts, the increase of calcination temperature resulted in the increase of monoclinic phase in sulfated zirconia, and the decrease of acid sites. According to the catalytic reactivity, at high calcination temperature, lower CO conversion, but higher isobutene production selectivity was observed from commercial sulfated zirconia. As for synthesized sulfated zirconia, the isobutene production selectivity slightly decreased with increasing calcination temperature, whereas the CO conversion was maximized at the calcination temperature of 600 ฐC. We concluded from the study that the difference in the calcination temperatures influenced the catalytic performance, sulfur content, specific surface area, phase composition, the relative intensity of Zr3+, and acid-base properties of the catalysts. ฉ 2009 Elsevier B.V. All rights reserved.

Keywords

CO hydrogenation, Isobutene, Isosynthesis