Effect of magnesium promoter on iron-based catalyst for Fischer–Tropsch synthesis

Yang, Jun; Sun, Yi; Tang, Yu; Liu, Ying; Wang, Hulin; Tian, Lei; Hong, Wang; Zhang, Zhixin; Xiang, Huimin; Li, Yongwang

doi:10.1016/j.molcata.2005.08.051

Cited by 79 publications

(48 citation statements)

References 29 publications

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“…Luckily, the CO conversion, the methane and CO 2 selectivity were stable during the entire experimental period. Similar results were reported in the previous studies in Fe-based catalysts [24][25][26]. They found that time on stream had an important influence on composition and structure of catalyst, and concluded that the FTS activity of iron catalyst was generated with time, when the a-Fe reacted with carbon from CO dissociation, forming the iron carbide, which was addressed as the true active species for FTS.…”

Section: Reaction Performancesupporting

confidence: 87%

One-Step Preparation of Bimodal Fe–Mn–K/SiO2 Catalyst and its Catalytic Performance of Slurry Phase Fischer–Tropsch Synthesis

Zhang

Liu

et al. 2010

Catal Lett

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Bimodal pore Fe-Mn-K catalysts supported onto SiO 2 pellet were prepared by a one-step incipient wetness impregnation method. In this method, the active component and promoters were used as the ''bricks'' to directly build up the small pores inside the large pores of silica gel. The catalysts were applied to catalyze FischerTropsch synthesis in slurry phase. Compared with the SiO 2 supported non-bimodal catalysts, the bimodal catalysts exhibited excellent activity due to the improved active metal dispersion and the fastened diffusion efficiency. The preparation method was much more feasible than the previous two-step method, and can be extended to prepare bimodal catalysts with different active components.

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Section: Reaction Performancesupporting

confidence: 87%

One-Step Preparation of Bimodal Fe–Mn–K/SiO2 Catalyst and its Catalytic Performance of Slurry Phase Fischer–Tropsch Synthesis

Zhang

Liu

et al. 2010

Catal Lett

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“…A systematic study on the modifying effect of Mg on a precipitated Fe-Cu-K/SiO 2 catalyst showed that there was an optimum content of Mg for obtaining better catalytic performances. [76] At an optimized Mg/Fe weight ratio (0.07), the activity of WGS reaction could be suppressed, whereas the FT activity was enhanced. Mg modification could also effectively shift the product distribution to lighter hydrocarbons, especially to gasoline-range hydrocarbons (C 5 -C 11 ), and could suppress the hydrogenation of light olefins, resulting in higher selectivity to C 2 -C 4 olefins.…”

Section: Co ! Co þC ð6þmentioning

confidence: 97%

Development of Novel Catalysts for Fischer–Tropsch Synthesis: Tuning the Product Selectivity

2010

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Fischer-Tropsch synthesis is a heterogeneous catalytic process for the production of clean hydrocarbon fuels or chemicals from synthesis gas (CO+H-2), which can be derived from non-petroleum feedstocks such as natural gas, coal, or biomass. Fischer-Tropsch synthesis has received renewed interests in recent years because of the global demand for a decreased dependence on petroleum for production of fuels and chemicals. The product distributions with conventional Fischer-Tropsch catalysts usually follow the Anderson-Schulz-Flory distribution and are typically unselective with regards to the formation of hydrocarbons from methane to waxes. Selectivity control is one of the key challenges of research into Fischer-Tropsch synthesis. This Review article summarizes the effects of key factors on catalytic properties, particularly the product selectivity, and highlights recent developments of novel Fischer-Tropsch catalysts and new strategies with an aim at controlling the product selectivity.National Natural Science Foundation of China [20625310, 20923004]; National Basic Research Program of China [2005CB221408, 2010CB732303]; Research Fund for the Doctoral Program of Higher Education [20090121110007]; Key Scientific Project of Fujian Province [2009HZ0002-1

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“…These smaller particles can be regarded as active sites for FTS, which shorten the structure evolution paths of Fe 2 O 3 . It was also observed that the Mg-promoted Fe/Cu/K/SiO 2 catalyst could enhance the catalytic activity and + 5 C selectivity; the highest Fe 5 C 2 percentage of the iron phase in this outstanding catalyst after activation was observed in the Mössbauer emission spectroscopy (MES) [66]. The FTS activity was also decreased with a decrease in the Fe 5 C 2 concentration, which was caused by the addition of silica [170].…”

Section: Xrdmentioning

confidence: 79%

“…Its addition to the core metal of iron decreased the crystallite size of iron oxides, led to more heavy hydrocarbons, and suppressed the formation of CH 4 [65]. Similarly, auxiliary metal like Mg also led to the small crystallite size of iron oxide and facilitated the reduction and carburization process [66]. In contrast to Mn and Mg, potassium addition to Fe-Mn catalyst resulted in larger crystallite size and lower surface area of the Fe catalysts and inhibited the reduction and carburization of iron [64].…”

Section: Promotional Effectmentioning

confidence: 99%

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

Zhai

Sun

Zhu

et al. 2013

Nanotechnology Reviews

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One key goal of heterogeneous catalysis study is to understand the correlation between the catalyst structure and its corresponding catalytic activity. In this review, we focus on recent strategies to synthesize well-defined Fischer-Tropsch synthesis (FTS) nanostructured catalysts and their catalytic performance in FTS. The development of those promising catalysts highlights the potentials of nanostructured materials to unravel the complex and dynamic reaction mechanism, particularly under the in situ reaction conditions. The crucial factors associated with the catalyst compositions and structures and their effects on the FTS activities are discussed with an emphasis on the role of theoretical modeling and experimental results.

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Effect of magnesium promoter on iron-based catalyst for Fischer–Tropsch synthesis

Cited by 79 publications

References 29 publications

One-Step Preparation of Bimodal Fe–Mn–K/SiO2 Catalyst and its Catalytic Performance of Slurry Phase Fischer–Tropsch Synthesis

One-Step Preparation of Bimodal Fe–Mn–K/SiO2 Catalyst and its Catalytic Performance of Slurry Phase Fischer–Tropsch Synthesis

Development of Novel Catalysts for Fischer–Tropsch Synthesis: Tuning the Product Selectivity

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

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