Catalytic study of Fe supported on mesoporous Al-MCM-41 catalyst in Fischer-Tropsch reaction using PSRA technique

  • Dr Sabaithip Tungkamani, Department of Industrial Chemistry, King Mongkut’s University of Technology North Bangkok, Thailand
  • A/Prof Dr Phavanee Narataruksa, Department of Chemical Engineering, King Mongkut’s University of Technology North Bangkok, Thailand
  • Mr Hussanai Sukkathanyawat, Department of Industrial Chemistry, King Mongkut’s University of Technology North Bangkok, Thailand
  • Miss Wanida Noopayyan, Department of Industrial Chemistry, King Mongkut’s University of Technology North Bangkok, Thailand
  • Miss Duangkeaw Napalai, Department of Industrial Chemistry, King Mongkut’s University of Technology North Bangkok
  • AssocProf Siriluck Nivitchanyong, National Metal and Materials Technology Center (MTEC), Thailand
  • Dr Bahij Sakakini, The School of Chemistry, The University of Manchester, United Kingdom

    • This research is aimed to study the preparation and characterization of Fe supported on mesoporous Al-MCM-41 catalyst in Fischer-Tropsch reaction. Catalysts prepared were characterized by BET, TGA, XRD, TPR and TPD technique. Support materials obtained give high surface area (~1000 m2/g) with mesoporous structure. TPR profiles show that more than one temperature peaks for the rate of H2 consumption were observed on 10%Fe/Al-MCM-41, 20%Fe/Al-MCM-41 and 30%Fe/Al-MCM-41 catalyst, indicating different iron oxide species dispersed on supports. The catalytic activity was investigated using Pulse Surface Reaction Analysis (PSRA) technique. When a pulse of CO was introduced into the catalyst under the H2 atmosphere at a constant temperature in the range of 140-260oC, methane was immediately produced and detected by FID detector installed in GC unit. Plotting between ln([CO]/[CO]o) versus time gives slope (-k). A value of k trends to increase with temperature for all catalysts investigated. It was observed that k value obtained from 20%Fe/Al-MCM-41 is higher than those obtained from 10%Fe/Al-MCM-41, and 30%Fe/Al-MCM-41 catalyst for temperature in the range of 140-260oC. Activation energies for the hydrogenation of CO, calculated from a slope of plotting ln(k) versus 1/T(K), gives 61-64 kJ/mol.