Effect of the Mesostructuration of the Beta Zeolite Support on the Properties of Cobalt Catalysts for Fischer–Tropsch Synthesis

Abstract

The effect of mesostructuration of beta zeolite and of metal loading on the properties of cobalt-based catalysts for Fischer-Tropsch synthesis was studied in this work. The most active catalyst was the mesostructured beta zeolite-supported cobalt (10%), which also showed a low selectivity to methane and the lowest olefin/paraffin ratio.

ZSM-5 seed-grafted SBA-15 as a high performance support for cobalt Fischer–Tropsch synthesis catalysts

“…However, an additional band at 563 cm -1 , which are similar to those of the five-membered rings of T-O-T (T = Si or Al) in zeolite crystals 14 Figure 6. The Co 2p profiles of the catalysts display the characteristic doublet corresponding to the spin-orbit coupling (2p 3/2 , 2p 1/2 ) with the most intense Co 2p3/2 peak at binding energies 780.1-780.4 eV 24 , which suggests that the main phase 35 on the catalysts surface is Co 3 O 4 26 , in agreement with the XRD results. To investigate the changes in the surface composition after the addition of ZSM-5 seeds, the atomic ratio of Co/Si is calculated and the obtained quantitative results are displayed in Table 2.…”

Effect of preparation method on catalytic performance, structure and surface reaction rates of MgO supported Fe–Co–Mn catalyst for CO hydrogenation

“…Several researchers [30][31][32][33][34] have pointed out that cobalt reducibility and species distribution depend on the used support. It has been reported that the reduction of Fe 2 O 3 in H 2 takes place in two (reaction (1) and the combination of (2) and (3)) or three consecutive steps (1, 2 and 3) depending on the temperature used for reduction and on the temperature ramping rate during TPR [35,36].…”

Breaking the Fischer–Tropsch synthesis selectivity: direct conversion of syngas to gasoline over hierarchical Co/H-ZSM-5 catalysts

“…However, the improvement was insignificant in comparison with the unmodified Beta sample. 7 A comprehensive study on 3 wt% Ru supported on desilicated ZSM-5 and Beta zeolites revealed that the activity for hydrocarbon reactions of FTS products correlates with the extent of support mesoporosity as well as with its acid strength. 8 In spite of the promising results, it is fair to admit that Ru is not the preferred metal of choice for large scale applications due to volatile Ru-carbonyl formation under reaction conditions.…”