Gas Phase Oligomerization of Isobutene over Acid Treated Kaolinite Clay Catalyst

Natural Kaolin Clay was calcined and treated by sulfuric acid. The resulting solid acid catalyst was characterized by FTIR, TGA, and X-ray powder diffraction (XRD) and tested for isobutene oligomerization in a gas phase. The characterization results showed that the acid treated clay underwent chemic...

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Bibliographic Details
Published inBulletin of chemical reaction engineering & catalysis Vol. 12; no. 1; pp. 119 - 126
Main Authors Aldhayan, Dhaifallah, Aouissi, Ahmed
Format Journal Article
LanguageEnglish
Published Semarang Department of Chemical Engineering, Diponegoro University 01.04.2017
Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)
Subjects
Catalysts
clay catalyst
clean gasoline
isobutene
Kaolin
Kaolinite
Oligomerization
Selectivity
solid acid catalyst
X-ray diffraction
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Summary:Natural Kaolin Clay was calcined and treated by sulfuric acid. The resulting solid acid catalyst was characterized by FTIR, TGA, and X-ray powder diffraction (XRD) and tested for isobutene oligomerization in a gas phase. The characterization results showed that the acid treated clay underwent chemical and structural transformations. After acid treatment, the Si/Al ratio was increased, and the crystalline raw clay became amorphous. The effects of various parameters such as reaction temperature, reaction time and contact time on isobutene oligomerization were investigated. Catalytic tests showed that isobutene oligomerization led to dimers and trimers as major products. Tetramers were obtained as by- products. At relatively high reaction temperatures and long contact times, the conversion was enhanced while the selectivity of dimers was decreased in favor of higher oligomers. 
ISSN:1978-2993
1978-2993
DOI:10.9767/bcrec.12.1.758.119-126