Comparative study of iron-based Fischer–Tropsch synthesis catalyst promoted with potassium or sodium

One-pot synthesis of promoted porous iron-based microspheres and its Fischer–Tropsch performance

“…However, obvious peak of Na1s is found at about 1071 eV (Fig. S1), indicating that Na + not occupy the tetrahedral site of Fe 3+ during the process of nucleation [11]. As for Fe/K pattern, obvious peaks of KCl are observed at about 28.3 • and 40.5 • besides peaks of Fe 3 O 4 .…”

“…As shown in Table 2, the selectivity to C 5 through C 11 hydrocarbon increased to 29.8 wt% when the selectivity to C 2-4 decrease to 32.8 wt%. It is to be noted that the ratio of olefin to paraffin is higher including C 2-4 and C [5][6][7][8][9][10][11] products fraction. This indicates that the confinement effect of pores facilitate hydride abstraction to form olefins.…”

Sodium-promoted iron catalysts prepared on different supports for high temperature Fischer–Tropsch synthesis

“…It is well-known that sodium addition leads to lower methane selectivity and a significant increase in the olefin-to-paraffin ratio and water-gas shift (WGS) activity [4,17,18]. The effect of sodium is usually explained by a decrease in the strength of C O bonds, which leads to a higher coverage of dissociated CO on the surface [4,18,20].…”

“…Other promoters such as copper [7,[10][11][12][13][14][15][16], sodium [4,[17][18][19][20][21][22], zinc [10], vanadium [23] and sulfur [20,24] have also been used. It is well-known that sodium addition leads to lower methane selectivity and a significant increase in the olefin-to-paraffin ratio and water-gas shift (WGS) activity [4,17,18].…”

Simulation for Integrated Systems of Typical Coal-to-liquids Processes and Waste Energy Exploitation Based on Different Gasification Processes

“…FT liquids are beneficial to environmental protection because of almost free of sulfur and aromatics. FT synthesis technology has been run successfully on commercial scale [12,13]. The growing market for this technology also drives further technological development of FT related processes.…”