화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.7, No.6, 441-448, November, 2001
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Characterization and Acid Catalytic Properties of Titanium Sulfate Supported on Zirconia
Jong Rack Sohn†, Tae-Dong Kwon1, and Sang-Bock Kim1
  • Department of Industrial Chemistry, Engineering College, Kyungpook National University, Taegu 702-701, Korea
  • 1Department of Chemistry, University of Ulsan, Ulsan 680-749, Korea
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Titanium sulfate supported on zirconia catalysts were prepared by drying of powdered Zr(OH)4 with titanium sulfate aqueous solution followed by calcining in air at high temperature. The characterization of prepared catalysts was performed using Fourier transform infrared (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and by the measurement of surface area. The addition of titanium sulfate to zirconia shifted the phase transition of ZrO2 from amorphous to tetragonal to higher temperature due to the interaction between titanium sulfate and zirconia, and the specific surface area and acidity of catalysts increased in proportion to the titanium sulfate content up to 5 wt% of Ti(SO4)2. Infrared spectra of ammonia adsorbed on Ti(SO4)2/ZrO2 showed the presence of Bronsted and Lewis acid sites on the surface of Ti(SO4)2/ZrO2. 5-Ti(SO4)2/ZrO2 calcined at 600 ℃ exhibited maximum catalytic activities for 2-propanol dehydration and cumene dealkylation. The catalytic activities for both reactions, 2-propanol dehydration and cumene dealkylation were correlated with the acidity of catalysts measured by ammonia chemisorption method.
Keywords:titanium sulfate;characterization;acid catalysis;2-propanol dehydration;cumene dealkylation;thermal analysis
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