화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.16, No.3, 411-418, May, 2010
DOI10.1016/j.jiec.2009.10.005  Export Citation
Isosynthesis via CO hydrogenation over SO4-ZrO2 catalysts
Watcharapong Khaodee, Nicha Tangchupong, Bunjerd Jongsomjit, Navadol Laosiripojana1, Piyasan Praserthdam, and Suttichai Assabumrungrat†
  • Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330,Thailand
  • 1The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
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Catalytic performances of sulfated zirconia catalysts with various contents of sulfur (from 0.1 to 0.75%) on isosynthesis were studied. It was firstly found that undoped-zirconia synthesized from zirconyl nitrate provided higher activity towards isosynthesis reaction (106 μmol kg-cat^(-1) s^(-1)) compared to that synthesized from zirconyl chloride (84.9 μmol kg-cat^(-1) s^(-1)). Nevertheless, the selectivity of isobutene in hydrocarbons was relatively lower. It was then observed that the catalytic reactivity and selectivity significantly improved by sulfur loading. The most suitable sulfur loading content seems to be at 0.1%, which gave the highest reaction rate and selectivity of isobutene. By applying several characterization techniques, i.e. BET, XRD, NH3- and CO2-TPD and SEM, it was revealed that the high reaction rate and selectivity towards isosynthesis reaction of sulfated zirconia catalysts are related to the acid-base properties, Zr3+ quantity and phase composition.
Keywords:CO hydrogenation;Isobutene;Isosynthesis;Sulfated zirconia;Synthesis gas
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