Selective Iron Catalysts for Direct Fischer–Tropsch Synthesis to Light Olefins

Liu, Zhenxin; Jia, Gaopeng; Zhao, Chenxi; Xing, Yu

doi:10.1021/acs.iecr.1c01304

Cited by 14 publications

(13 citation statements)

References 49 publications

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“…The highest C2-C4 olefin selectivity of 52.1% was obtained over the N1 catalyst at 340 °C and CO conversion of 38.3%, and hydrogenation of olefins to paraffins was successfully suppressed, while the content of olefins in the fractions of C2, C3, and C4 hydrocarbons reached ultra-high values of 90.7%, 94.7%, and 92.9%, respectively [98]. In another study by Liu et al [100], the 15%Fe/2%K2O/83%ZnAl2O4•3Al2O3 catalyst exhibited the high C2-C4 olefin selectivity of 64.4% at 360 °C 20 bar, and CO conversion of 15.2%. The content of olefins in C2, C3, and C4 fractions were 88%, 92%, and 89%, respectively.…”

Section: Alumina Supported Catalystsmentioning

confidence: 87%

Production of Light Olefins via Fischer-Tropsch Process Using Iron-Based Catalysts: A Review

Gholami

Tišler

et al. 2022

Catalysts

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The production of light olefins, as the critical components in chemical industries, is possible via different technologies. The Fischer–Tropsch to olefin (FTO) process aims to convert syngas to light olefins with high selectivity over a proper catalyst, reduce methane formation, and avoid the production of excess CO2. This review describes the production of light olefins through the FTO process using both unsupported and supported iron-based catalysts. The catalytic properties and performances of both the promoted and bimetallic unsupported catalysts are reviewed. The effect of support and its physico-chemical properties on the catalyst activity are also described. The proper catalyst should have high stability to provide long-term performance without reducing the activity and selectivity towards the desired product. The good dispersion of active metals on the surface, proper porosity, optimized metal-support interaction, a high degree of reducibility, and providing a sufficient active phase for the reaction are important parameters affecting the reaction. The selection of the suitable catalyst with enhanced activity and the optimum process conditions can increase the possibility of the FTO reaction for light-olefins production. The production of light olefins via the FTO process over iron-based catalysts is a promising method, as iron is cheap, shows higher resistance to sulfur, and has a higher WGS activity which can be helpful for the feed gas with a low H2/CO ratio, and also has higher selectivity towards light olefins.

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Section: Alumina Supported Catalystsmentioning

confidence: 87%

Production of Light Olefins via Fischer-Tropsch Process Using Iron-Based Catalysts: A Review

Gholami

Tišler

et al. 2022

Catalysts

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“…In addition, the metal valence state as well as the redox properties and interface structures of PTOs can be adjusted by elemental doping, or by partial substitution of the A and/or B sites, to provide controlled selectivity for the target products [128]. According to previous studies, perovskite-type catalysts have shown high catalytic activity in FTS [129][130][131] and RWGS reactions [132,133]. Therefore, as a potential material, Fe-doped perovskite catalysts have also been investigated for CO 2 hydrogenation to hydrocarbons.…”

Section: Perovskite-type Oxidesmentioning

confidence: 99%

Hydrogenation of CO2 to Olefins over Iron-Based Catalysts: A Review

et al. 2022

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The widespread use of fossil fuels has caused high CO2 concentrations in the atmosphere, which have had a great impact on climate and the environment. Methods for efficiently utilizing CO2 to produce high value-added chemicals have received increasing attention. Among the products of CO2 hydrogenation, olefins, an important petrochemical feedstock, are one of the essential target products. Therefore, CO2 hydrogenation to olefins has been extensively studied, especially for the development of high-performance catalysts. Iron-based catalysts, which are widely used in Fischer–Tropsch synthesis reactions, have also been considered attractive for use in the CO2 hydrogenation to olefins due to their excellent performance in catalytic activity and reaction stability. Most studies have focused on the modulation of morphology; reduction and adsorption properties by tuning the methods of catalyst syntheses; pretreatment conditions and the composition of catalysts, in order to improve hydrogenation activity and olefin yield. In this review, we briefly discuss a thermodynamic overview of the CO2 hydrogenation to olefins reaction, the optimization of catalyst modifications, and current insights into the reaction mechanism; moreover, we summarize current challenges and future trends in the CO2 hydrogenation to olefins.

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“…It is immeasurable to estimate the astounding prosperity crude oil has offered to society with the provision of hydrocarbon fuels (gasoline, diesel fuel, and jet fuel), oxygenates (dimethyl ether, methanol, and higher alcohols), and other chemical building blocks (aromatics and light olefins). − However, growing concerns following crude oil depletion and environmental concerns about their exploitation have sparked the search for alternative carbon sources and processes that are sustainable and environmentally benign. − Accordingly, syngas (a mixture of CO and H 2 ), which can be produced from carbon(IV) oxide, biomass, coal, natural gas, and carbon-based waste has become a sustainable option to supply these chemical feedstocks, oxygenates, and fuels, traditionally produced from crude oil. − Syngas conversion is a catalytic process with extensive studies allocated to efficient catalyst development for the selective production of valued products. − Catalysts required for the successful synthesis of the valued chemicals and fuels normally include a metallic species in the form of single atoms, clusters, carbides, oxides, or alloy particles (e.g., Co, Rh-, AuPd-, metallic Fe, Fe 5 C 2 -based catalysts). ,− However, these metallic species are challenged with poor catalytic stability with a hydrocarbon product distribution that barely differs from the prediction of the Anderson-Schultz-Flory (ASF) probability model; thus, the production of desired products remains a difficult challenge. − Overcoming product selectivity limitations with further improvements using composite materials for tandem catalysis via strategic designs have become important areas of research.…”

Section: Introductionmentioning

confidence: 99%

Tandem Reactions over Zeolite-Based Catalysts in Syngas Conversion

et al. 2022

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Syngas conversion can play a vital role in providing energy and chemical supplies while meeting environmental requirements as the world gradually shifts toward a net-zero. While prospects of this process cannot be doubted, there is a lingering challenge in distinct product selectivity over the bulk transitional metal catalysts. To advance research in this respect, composite catalysts comprising traditional metal catalysts and zeolites have been deployed to distinct product selectivity while suppressing side reactions. Zeolites are common but highly efficient materials used in the chemical industry for hydroprocessing. Combining the advantages of zeolites and some transition metal catalysts has promoted the catalytic production of various hydrocarbons (e.g., light olefins, aromatics, and liquid fuels) and oxygenates (e.g., methanol, dimethyl ether, formic acid, and higher alcohols) from syngas. In this outlook, a thorough revelation on recent progress in syngas conversion to various products over metal-zeolite composite catalysts is validated. The strategies adopted to couple the metal species and zeolite material into a composite as well as the consequential morphologies for specific product selectivity are highlighted. The key zeolite descriptors that influence catalytic performance, such as framework topologies, proximity and confinement effects, acidities and cations, pore systems, and particle sizes are discussed to provide a deep understanding of the significance of zeolites in syngas conversion. Finally, an outlook regarding challenges and opportunities for syngas conversion using zeolite-based catalysts to meet emerging energy and environmental demands is also presented.

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Selective Iron Catalysts for Direct Fischer–Tropsch Synthesis to Light Olefins

Cited by 14 publications

References 49 publications

Production of Light Olefins via Fischer-Tropsch Process Using Iron-Based Catalysts: A Review

Production of Light Olefins via Fischer-Tropsch Process Using Iron-Based Catalysts: A Review

Hydrogenation of CO2 to Olefins over Iron-Based Catalysts: A Review

Tandem Reactions over Zeolite-Based Catalysts in Syngas Conversion

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