Kinetics of CO hydrogenation over coprecipitated cobalt-alumina
Journal of Chemical Technology and Biotechnology, cilt.70, sa.3, ss.304-310, 1997 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 70 Sayı: 3
- Basım Tarihi: 1997
- Dergi Adı: Journal of Chemical Technology and Biotechnology
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.304-310
- Anahtar Kelimeler: CO hydrogenation, Cobalt-alumina, Coprecipitation, Intrinsic kinetics
- Kocaeli Üniversitesi Adresli: Evet
Özet
The kinetics of CO hydrogenation over coprecipitated 36 wt% Co/A12O3 was studied in a fixed-bed microreactor at atmospheric pressure. Intrinsic kinetic data were obtained in the initial rate region using four different CO concentrations and two different H2/CO ratios over the 473-523 K temperature range. The surface carbide mechanism with dissociative adsorption of hydrogen as the rate controlling step gives the most plausible kinetic model among the eight different models tested. C1-C4 production rates are found to be strongly influenced by temperature, and optimum C1-C4 hydrocarbon selectivity is obtained at 508 K. The activation energy for CO consumption and CH4 formation are calculated as 74 ± 2 kJ mol-1 and 84 ± 2 kJ mel-1 respectively. The kinetics of CO hydrogenation over coprecipitated 36 wt% Co/Al2O3 was studied in a fixed-bed microreactor at atmospheric pressure. Intrinsic kinetic data were obtained in the initial rate region using four different CO concentrations and two different H2/Co ratios over the 473-523 K temperature range. The surface carbide mechanism with dissociative adsorption of hydrogen as the rate controlling step gives the most plausible kinetic model among the eight different models tested. C1-C4 production rates are found to be strongly influenced by temperature, and optimum C1-C4 hydrocarbon selectivity is obtained at 508 K. The activation energy for CO consumption and CH4 formation are calculated as 74 ± 2 kJ mol-1 and 84 ± 2 kJ mol-1 respectively.