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- Title
Catalysis and deactivation of SO/ZrO<sub>2</sub> solid acid on the alkylation of benzene with 1-dodecene.
- Authors
Zhicai Wang; Hengfu Shui; Kang Sun
- Abstract
Catalysis and deactivation of SO/ZrO2 solid acid on the alkylation of benzene and 1-dodecene were studied by the characterization of XRD, BET, IR, TG/DTA, and NH3-TPD techniques and the determination of the 1-dodecene conversion, the yield of dodecylbenzene and the selectivity of linear alkylbenzene respectively. In addition, some treatment methods, such as the extraction with benzene or THF as solvent, and the calcinations with or without the dipping of H2SO4 in air, were respectively used to recover the activity of deactivated catalyst. The results indicate that SO/ZrO2 solid acid shows higher catalytic activity for the alkylation of benzene and 1-dodecene with nearly 100% of 1-dodecene conversion and more than 80% of dodecylbenzene yield, and higher selectivity of 2-LAB. The activity of catalyst for the alkylation of benzene is in proportion to the content and the strength of medium acid site. However, the distinct deactivation of catalyst was also obversed in the alkylation. According to the characterization of deactivated catalyst, the accumulation of hydrocarbon fragment and the removal of are mainly reasons of SO/ZrO2 deactivation. The SO/ZrO2 calcinated at higher temperature is apt to deactivate. The treatment by extraction with solvent or calcinations can recover the catalytic activity of spent catalyst at a certain extent, especially calcination with the dipping of H2SO4.
- Subjects
CATALYSIS; HYDROCARBONS; SURFACE chemistry; ORGANIC compounds; CHEMICAL reactions
- Publication
Kinetics & Catalysis, 2009, Vol 50, Issue 3, p435
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S002315840903015X