title: Studies on nanosized iron based modified catalyst for Fischer-Tropsch synthesis application.
abstract: To improve catalytic performance iron based catalyst, the effects of some metal promoters, especially potassium, copper and other transition metal oxides as well as different supports have been reported. A series of Fe/K/Cu catalysts promoted with magnesium and ceria by precipitation method, followed by impregnation method; keeping Cu and K content same. The catalysts were characterized by XRD, N2 physisorption, TPR and TEM techniques. From XRD, the presence of hematite (Fe2O3) phase was detected in all precipitated iron catalysts and CFe2.5 phase in all used catalysts. TPR results showed that addition of Mg facilitated the reduction of Fe2O3 and decrease in reduction temperature. The catalytic performance was investigated in a fixed-bed reactor at 250 degrees C, 2 MPa pressure and H2/CO molar ratio of 2. Concentration of Mg was found to affect the CO conversion and product distribution. It was found that precipitated iron catalyst Fe/Mg/Cu/K with Mg/Fe ratio of 0.1 showed highest conversion (60.6%) and C5(+) selectivity (92.4%) among all catalysts tested.
authors: Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 136-796, Korea.
authors: MoonJu
authors: M
authors: Park
authors: Jung Shik
authors: JS
authors: Kang
authors: Ki Poong
authors: KP
authors: Na
authors: Sang Deuk
authors: SD
authors: Lee
authors: S V
authors: SV
authors: Awate
authors: Dong Ju
authors: DJ
authors: Moon