Activated carbon templated synthesis of hierarchical zeolite Y-encapsulated iron catalysts for enhanced gasoline selectivity in CO hydrogenation

Abstract

Fischer-Tropsch synthesis (FTS) remains the technology of the future for sustainable production of hydrocarbon fuels. Till date, controlling the hydrocarbon selectivity is still a major challenge since it tends to...

Fe2O3 Nanocatalysts Supported on Zeolite-Y for the Selective Synthesis of C2 Di-Indolyl Indolones and Isatins

“…16 So far, different types of metal complexes and metal nanocatalysts are synthesized within the super-cage of zeolite-Y or on the zeolite support. 15,17,18 Zeolite-Y having both external and internal surface hydroxyl groups favor a good metal-to-surface interaction. 19 Zeolite-Y is known to be an excellent hard templating agent for shaping and controlling the formation of different nanomaterials such as carbon nanomaterials and metal oxide nanoparticles.…”

Tandem Reactions over Zeolite-Based Catalysts in Syngas Conversion

“…The enhanced synthesis of C 5 + hydrocarbons demonstrate the ability of novel catalysts to overcome the predictions of the ASF distribution. 26,97 The FTS route which is very common has incorporated different strategies to couple mainly Co and Fe-based catalysts with zeolites to orient products toward gasoline. Further research has been undertaken to significantly improve the gasoline quality, since its octane rating is crucial for standardization and engine performance.…”

“…The production of C 5 + hydrocarbons from syngas has been studied extensively via various routes. The enhanced synthesis of C 5 + hydrocarbons demonstrate the ability of novel catalysts to overcome the predictions of the ASF distribution. , The FTS route which is very common has incorporated different strategies to couple mainly Co and Fe-based catalysts with zeolites to orient products toward gasoline. Further research has been undertaken to significantly improve the gasoline quality, since its octane rating is crucial for standardization and engine performance. − Tsubaki’s group can be identified as one popular in the direct syngas conversion to gasoline. ,− Zhang et al rationalized the selectivity for gasoline-ranged isoparaffins via the induction of olefins .…”

“…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.…”

Ambient-Pressure Synthesis of Highly Crystallized Zeolite NaA

“…There are an increasing number of literature studies concerning the different methods that have been employed for the synthesis of zeolites with unique and specific application properties. − Nevertheless, it is a tedious job to produce a zeolite of desired crystallinity, anticipated framework topology, and porosity for better application at a low production cost. Conventionally, zeolites are produced through high-pressure hydrothermal (HT) synthesis in an autoclave. , The disadvantages of using this method are the safety concerns regarding the high reaction pressure, environmental pollution due to wastewater, large requirements of energy, and the use of Teflon reactors .…”