Fischer-Tropsch reaction within zeolite crystals for selective formation of gasoline-ranged hydrocarbons

Wang, Chengtao; Fang, Wei; Wang, Liang; Xiao, Feng‐Shou

doi:10.1016/j.jechem.2020.06.006

Cited by 32 publications

(23 citation statements)

References 36 publications

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“…Therefore, we except to control the carbon chain growth by using the confined environment of zeolite micropores. Following this design, Ru nanoparticles were fixed within NaY zeolite crystals that show gasoline-range hydrocarbon (C 5 –C 11 ) selectivity at 64.3% in Fischer–Tropsch synthesis . The limited space of zeolite micropores efficiently hinders C 12+ product formation in steadily outperforming the limitation of the Anderson–Schulz–Flory distribution (maximum of gasoline-ranged hydrocarbon selectivity at 45%).…”

Section: Conclusion and Perspectivesmentioning

confidence: 99%

Zeolite Fixed Metal Nanoparticles: New Perspective in Catalysis

Wang

et al. 2021

Acc. Chem. Res.

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142

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Conspectus Loading metal nanoparticles on the surface of solid supports has emerged as an efficient route for the preparation of heterogeneous catalysts. Notably, most of these supported metal nanoparticles still have shortcomings such as dissatisfactory activity and low product selectivity in catalysis. In addition, these metal nanoparticles also suffer from deactivation because of nanoparticle sintering, leaching, and coke formation under harsh conditions. The fixation of metal nanoparticles within zeolite crystals should have advantages of high activities for metal nanoparticles and excellent shape selectivity for zeolite micropores as well as extraordinary stability of metal nanoparticles immobilized with a stable zeolite framework, which is a good solution for the shortcomings of supported metal nanoparticles. Materials with metal nanostructures within the zeolite crystals are normally denoted as metal@zeolite, where the metal nanoparticles with diameters similar to those of industrial catalysts are usually larger than the micropore size. These metal nanoparticles are enveloped with the zeolite rigid framework to prevent migration under harsh reaction conditions, which is described as a fixed structure. The zeolite micropores allow the diffusion of reactants to the metal nanoparticles. As a result, metal@zeolite catalysts combine the features of both metal nanoparticles (high activity) and zeolites (shape selectivity and thermal stability), compared with the supported metal nanoparticles. In this Account, we describe how the zeolite micropore and metal nanoparticle synergistically work to improve the catalytic performance by the preparation of a variety of metal@zeolite catalysts. Multiple functions of zeolites with respect to the metal nanoparticles are highlighted, including control of the reactant/product diffusion in the micropores, the adjustment of reactant adsorption on the metal nanoparticles, and sieving the reactants and products with zeolite micropores. Furthermore, by optimizing the wettability of the zeolite external surface, the zeolite crystals could form a nanoreactor to efficiently enrich the crucial intermediates, thus boosting the performance in low-temperature methane oxidation. Also, the microporous confinement weakens the adsorption of C1 intermediates on the metal sites, accelerating the C–C coupling to improve C2 oxygenate productivity in syngas conversion. In particular, the zeolite framework efficiently stabilizes the metal nanoparticles against sintering and leaching to give durable catalysts. Clearly, this strategy not only guides the rational design of efficient heterogeneous catalysts for potential applications in a variety of industrial chemical reactions but also accelerates the fundamental understanding of the catalytic mechanisms by providing new model catalysts.

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Section: Conclusion and Perspectivesmentioning

confidence: 99%

Zeolite Fixed Metal Nanoparticles: New Perspective in Catalysis

Wang

et al. 2021

Acc. Chem. Res.

Self Cite

142

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“…By default, iron–alumina will give diesel . Recently, zeolite has been used as catalyst support in FT, to produce gasoline. , …”

Section: Biodiesel Green Diesel and Biogasolinementioning

confidence: 99%

“…104 Recently, zeolite has been used as catalyst support in FT, to produce gasoline. 105,106 Figure 4 shows the contribution of sustainable oil for transportation in many countries such as Malaysia, Indonesia, and Thailand with an abundant source of palm oil. Palm oil (crude palm oil, CPO) can be a source of production for biodiesel (FAME), green diesel (HVO), green gasoline, and bio LPG.…”

Section: + ↔ +mentioning

confidence: 99%

Highlighting the Greener Shift in Transportation Energy and Fuels Based on Novel Catalytic Materials

Muraza

2020

Energy Fuels

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Sustainable energy and fuels for personal vehicles is one of the most important topics nowadays. With the spirit being to minimize climate change, decarbonization strategy has been applied to transportation fuels, power generation, and personal vehicles. In the past, there was an incentive to shift from gasoline to biomass-derived liquid fuels such as ethanol. With an oversupply of shale gas and the availability of biogas, carbon pollution was further reduced to compressed natural gas and hydrogen fuel. Recently, the personal electric vehicle has also being promoted in different countries. However, there are many challenges in each generation of fuels. In this minireview, substantial research avenues for each alternative fuel are being highlighted from a heterogeneous catalysis perspective. The needs for better catalysts in ethanol blended gasoline production, the quest to get better methane and hydrogen storage, and the search for abundant energy storage materials are discussed carefully. Since most of countries with electric vehicle programs are still generating electricity in coal plants, the search for cost-effective sorbent materials for CO 2 capture materials are also emphasized.

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“…The influence of shell thickness or pore length on activity and selectivity has also been reported, since CO diffusion limitations may enhance CH 4 selectivity and chain termination probability, , and H 2 O diffusion limitation may lead to the oxidation of the active sites . Many studies have already reported the application of different nature multicore@shell nanoparticles, ,,− core@shell nanoparticles shaped as nanoplates or cubes, and nanocomposites ,, as catalysts in Fischer–Tropsch synthesis. It is worth mentioning that the use of encapsulated nanoparticles might help the understanding of how the diffusion of the reagents and products affects Fischer–Tropsch synthesis, in particular with the use of concentric spherical single-core@shell structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Encapsulation on Cobalt-Based Catalysts for Fischer–Tropsch Synthesis under Different Reaction Conditions

Smarzaro

Baldanza

Almeida

et al. 2021

Ind. Eng. Chem. Res.

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Cobalt nanoparticles prepared by a solvothermal treatment were encapsulated in silica with different shell thicknesses by the Stöber method. The application of these materials as catalysts in Fischer–Tropsch synthesis was investigated under different reaction conditions, and their behaviors were compared to a silica-supported cobalt catalyst. The protective effect displayed by the silica shell avoided sintering of the active phase and influenced the reaction selectivity and activity in comparison with the supported catalyst. The silica shell thickness also played an important role in catalytic performance. A decrease in shell thickness caused an enhancement in selectivity toward C19–C24 hydrocarbons, indicating the occurrence of a confinement effect by silica pores over hydrocarbon growth. Furthermore, a high production of methane might be related to the occurrence of CO diffusion limitations due to the thicker silica shell. The activity and selectivity remained similar at different reaction temperatures. However, the use of a lower temperature caused an increase in stability.

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Fischer-Tropsch reaction within zeolite crystals for selective formation of gasoline-ranged hydrocarbons

Cited by 32 publications

References 36 publications

Zeolite Fixed Metal Nanoparticles: New Perspective in Catalysis

Zeolite Fixed Metal Nanoparticles: New Perspective in Catalysis

Highlighting the Greener Shift in Transportation Energy and Fuels Based on Novel Catalytic Materials

Effect of Silica Encapsulation on Cobalt-Based Catalysts for Fischer–Tropsch Synthesis under Different Reaction Conditions

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