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Showing 1 to 20 of 91 for “"fischer tropsch synthesis"”.
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Zeolite-Modified Fischer-Tropsch Synthesis
The improvement of the gasoline selectivity and quality with the addition of HZSM-5 to the Fe-FT process is evident from literature. The catalytic performance of the combined Fe-FT/HZSM-5 system has been observed to decline with time-on-stream, attributed to the migration of alkali from the Fe-FT …
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The slurry-phase Fischer-Tropsch synthesis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1991.
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Nanosized iron crystallites for Fischer-Tropsch synthesis
Fischer-Tropsch synthesis is the production of hydrocarbons from CO and H2. The catalytically active metals for industrial application are cobalt and iron. In this work iron-based catalysts were studied. To ensure maximum metal utilisation and therefore a high weight specific catalytic activity, …
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Product distributions of the Fischer-Tropsch synthesis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1989.
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Catalyst systems for the Fischer-Tropsch synthesis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1992.
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Fischer-Tropsch synthesis in a slurry reactor
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982.
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ENHANCING GAS PHASE FISCHER-TROPSCH SYNTHESIS CATALYST DESIGN
… investigated. A series of Fe-based catalysts for Fischer-Tropsch (F-T) synthesis were prepared. The different promoters were incorporated into the catalyst by impregnation The catalysts were characterized by several methods. The catalytic performance of these materials for F-T synthesis were …
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Fly Ash Zeolite Catalyst Support for Fischer-Tropsch Synthesis
… in heterogeneous catalytic processes. Gas phase Fischer-Tropsch Synthesis (FTS) over a fixed-bed of the prepared catalyst/FAZ support was identified as an appropriate process for evaluation, by comparison with commercial catalyst supports (silica, alumina, and 13X). Fly ash, obtained from the …
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DEVELOPMENT OF SUPPORTED COBALT CATALYST FOR FISCHER-TROPSCH SYNTHESIS
Fischer–Tropsch Synthesis (FTS) is a major part of feed-to-liquid (XTL) technologies which convert syngas (H_2+CO) into clean liquid hydrocarbon fuels and specialty chemicals. Understanding and developing FTS catalysts using mesoporous materials are of main interest in the present work. In the …
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Alumina-modified cobalt catalysts for the Fischer-Tropsch synthesis
In the Fischer-Tropsch process, valuable hydrocarbons are produced using the basic starting materials hydrogen and carbon monoxide, which can be derived from alternative carbon sources such as coal, gas or biomass [1]. Although this process has been studied for almost a century, the effects of the …
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Metallic cobalt derived from cobalt nitrides for Fischer-Tropsch Synthesis
The Fischer-Tropsch synthesis (FTS) is a catalytic surface polymerisation reaction that converts synthesis gas, a mixture of carbon monoxide (CO) and hydrogen, into long chain hydrocarbons, namely α-olefins and n-paraffins. The product selectivity of this reaction is dependent on the nano effects …
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The performance of structured cobalt catalysts in Fischer-Tropsch synthesis
… burning, high cetane number diesel fuel from synthesis gas using the Fischer-Tropsch synthesis. Hence, increasing C5+ selectivity of cobalt catalysts is one of the hot topics in Fischer-Tropsch synthesis. Internal mass transport limitation may affect C5+ selectivity. It was concluded that mild …
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Development of a microreactor system for unsteady-state Fischer- Tropsch synthesis
… been developed for studies of unsteady-state Fischer-Tropsch synthesis. This development is aimed at preventing carbon deposition on a fused-iron catalyst in a novel reactor called the “heat-tray.” This reactor involves a supernatant gas flowing over a shallow fluidized bed of catalyst …
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Oxygenates in iron Fischer-Tropsch synthesis : is copper a selectivity promoter?
The Fischer-Tropsch synthesis is regarded as a stepwise polymerisation reaction between adsorbed hydrogen, carbon monoxide and monomers formed from them. Commercially, a supported precipitated iron catalyst promoted with small amounts of potassium and copper is one of the catalysts used in this …
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Comparing the performance of different catalyst packings for Fischer-Tropsch synthesis
… of fuel production. Low temperature Fischer-Tropsch synthesis is an attractive alternative to crude refining. During Fischer-Tropsch synthesis (FTS), synthesis gas, a mixture of H2 and CO is converted to a wide range of value-added long chain hydrocarbon products in a polymerisation …
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Fischer-Tropsch synthesis over SiO2, ZnO and MnO supported cobalt catalysts
… is well known as a support for cobalt supported Fischer-Tropsch catalysts. Silica has a high surface area with an amorphous structure that promotes dispersion of the active cobalt phase over the support surface. This dispersion is vital in terms of catalyst performance and derives from the …
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Development of a Kinetic Model for Low Temperature Fischer-Tropsch Synthesis
… sustainable alternatives. The well-established FischerTropsch (FT) synthesis is a potential process route to produce liquid fuels and speciality chemicals and address this challenge. FT synthesis is a polymerisation reaction in which syngas, a mixture of CO and H2, is converted to hydrocarbon …
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Ruthenium and osmium complexes as catalyst precursors for Fischer-Tropsch synthesis
… more than one metallic site is needed for the Fischer-Tropsch synthesis.
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Deuterium Tracer Study Of The Mechanism Of Iron Catalyzed Fischer-Tropsch Synthesis
<p>The Fischer-Tropsch Synthesis (FTS) was invented in 1920s, shortly after its invention, it became an important way to produce synthetic fuels. The FTS is also an important way to understand the origin of life. Even though the FTS has been used to produce liquid fuels commercially for a …
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Deuterium Tracer Studies Of The Mechanism Of Cobalt Catalyzed Fischer-Tropsch Synthesis
<p>Since the Fischer-Tropsch (FT) catalytic polymerization reaction has been discovered in 1920s, many kinds of possible mechanisms have been reported. However, there is still debate because there is a lacking of experimental evidence to discriminate the validity of each mechanism. To define the …
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