Effect of process conditions on the surface reaction rates and catalytic performance of MgO supported Fe–Co–Mn catalyst for CO hydrogenation

Effect of Drying Conditions on the Catalytic Performance, Structure, and Reaction Rates over the Fe-Co-Mn/MgO Catalyst for Production of Light Olefins

“…In order to obtain the fresh calcined catalysts all of these dried precursors were calcined at 600 °C for 6 h under air atmosphere. The obtained catalysts were evaluated for CO hydrogenation under the same operational conditions (T = 350 °C, P = 1 atm, H2/CO = 2/1, and GHSV = 5400 h -1 ) [26]; the obtained results are presented in Figure 2. As it can be seen, fresh catalyst obtained from the precursor which dried at 120 °C for 16 h has shown the best catalytic performance for CO hydrogenation.…”

“…These precursors were calcined at 600 °C for 6 h under air atmosphere; the obtained calcined catalysts were tested for CO hydrogenation under the same operational conditions (T = 350 °C, P = 1 atm, H2/CO = 2/1,and GHSV = 5400 h -1 ) [26] and the obtained results are displayed in Figure 10. According to the catalytic behavior results the calcined catalyst obtained from the precursor which dried at 120 °C for 16 h has shown the best catalytic performance for production of C2-C4 light olefins products fraction (this catalyst has higher selectivity toward light olefins and lower selectivity for methane production).…”

“…The addition of Mn to Fe or Co catalysts brought about a significant increase in light olefins formation and a decrease in methane selectivity [21][22][23]. In our previous work we used the Fe-Co-Mn ternary catalyst for the first time and investigate different preparation and operational conditions over this catalyst for CO hydrogenation [24][25][26][27]. In the present work we investigate the effect of drying conditions on the catalytic performance and catalyst structure of co-precipitated Fe-CoMn catalyst and also investigate different surface reaction rates.…”

Magnesium oxide as a heterogeneous catalyst support

“…The utilization of Fe-based catalysts is substantially needed owing to their great catalytic performance and water-gas shift reactivity, which contributes to make up the shortage of H 2 in the syngas from modern energy-efficient coal gasifiers ( Figure 39) (Arsalanfar et al 2012b, Arsalanfar et al 2014. Co is the most desired metal for fabrication of long-chain hydrocarbons from synthetic gas because of its excellent activity per weight of metal, high selectivity to linear paraffins, high stability toward deactivation of water, low water-gas shift activity, and low price compared to noble metals, including Ru, Re, or Pt.…”

“…The variables include calcination temperature, calcination time, and the atmosphere of calcination. Meanwhile, the H 2 /CO feed molar ratio and space velocity also gave a significant effect on the final performance of Fe-Co-Mn/MgO catalyst, especially the ones produced using coprecipitation process in a fixed-bed microreactor (Arsalanfar et al 2012b). …”