Products of the Hydrogenation of Carbon Monoxide over an Iron Catalyst - Aliphatic and Alicyclic Hydrocarbons

Weitkamp, A. W.; Seelig, Herman S.; Bowman, Norman J.; Cady, W.E.

doi:10.1021/ie50518a031

Cited by 54 publications

(16 citation statements)

References 9 publications

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“…To reiterate, these include: multiple chain growth probabilities due to different types of active sites; [32][33][34][35][36][37][38] diffusion enhanced alpha olefin reincorporation; [39][40][41] greater solubility or physisorption strength; [42][43][44] vaporliquid equilibrium; 45,46 chain-length dependent product accumulation; [47][48][49] gradients in process conditions at the scale of the particle or reactor; 50 and dependent olefin desorption or greater olefin adsorptivity. [51][52][53] During FTS at realistic conditions using either a fixed bed or slurry phase reactor, catalyst pores are filled with hydrocarbon products. With a CSTR, Shi and Davis 48 demonstrated that product accumulation within the reactor significantly alters the apparent product distribution away from the ideal distribution.…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Applications of isotopic tracers in Fischer–Tropsch synthesis

Jacobs

Davis

2014

Catal. Sci. Technol.

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In this review, five different applications of isotopic tracers to the Fischer-Tropsch synthesis reaction on cobalt, iron, and ruthenium catalysts are reviewed. By co-feeding molecules containing a radioactive 14 C-label and monitoring the fate of the species in the product distribution, researchers have identified molecules that are candidates for chain initiation or reincorporation into the growing chain. Kinetic isotope effects resulting from H 2 /D 2 switching have provided insights into the rate limiting steps involved in chain initiation and propagation. H 2 /D 2 switching has also been employed in order to account for the holdup of heavier products in the reactor, thus allowing one to correct for the product accumulation effect on the ASF plot so that the true impact of olefin reincorporation on the product distribution can be assessed. The competitive adsorption of H 2 and D 2 on the catalyst surface has also been explored in order to identify if H-D partitioning effects could influence the probability for one isotope to be favored for reaction during FTS and thus influence KIE results. Finally, steady state isotopic transient kinetic analysis (SSITKA) has been utilized to obtain a number of important kinetically relevant parameters (e.g., number of active sites, rate constant, TOF, etc.), to quantify the pool of reactive intermediates on the catalyst surface, and explore how co-adsorbed molecules may influence the size or reactivity of the reactive pool.

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Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Applications of isotopic tracers in Fischer–Tropsch synthesis

Jacobs

Davis

2014

Catal. Sci. Technol.

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“…In all runs herein reported a 1:1 E2:CO synthesis gas was used. 6 Space velocity is here defined as volume of entering gas per volume of catalyst space per hour; the catalyst volume was 100 cc. in the radioactive methanol addition experiment and 50 cc.…”

Section: 1mentioning

confidence: 99%

Mechanism Studies of the Fischer-Tropsch Synthesis. The Addition of Radioactive Methanol, Carbon Dioxide and Gaseous Formaldehyde

Hall¹,

Kokes²,

Emmett³

1957

J. Am. Chem. Soc.

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“…Thus, any development to reduce our dependence on foreign suppliers of petroleum, e.g., an economic coal-based process, should have high priority (2). Hence, there has been a renewal of interest in Fischer-Tropsch processes (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), the catalytic synthesis of primarily C5-C11 hydrocarbons from CO-H2 mixtures. Unfortunately, economic considerations indicate that a synthetic naphtha as cracker feedstock for American Chemical 0-8412-04^^j^3jlfm.â4^$05.00/0…”

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confidence: 99%

Cobalt-Based Catalysts for the Production of C₂-C₄ Hydrocarbons from Syn-Gas

Dent

Lin

1979

Advances in Chemistry

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Results of catalytic screening tests aimed at enhancing the selectivity of cobalt-basedFischer-Tropsch catalysts for the C2-C4 hydrocarbon fraction are reported. In these studies cobalt-zirconia, cobalt-copper, cobalt-chromia, and cobalt -manganese supported on kieselguhr or alumina were tested at 7.8 atm of a 1CO:3H2:6He feed gas using a Berty, inter nally recycled, stirred catalytic reactor. The results to date show that while cobalt-chromia-kieselguhr and cobalt-zirconia-kieselguhr catalysts exhibit higher global rates for CO conversion (54.6 and 116.6 µmol/sec • gcat at 500 K, respec tively), cobalt-manganese-alumina catalysts show the great est selectivity potential to produce C2-C4 olefins in the 450-623 Κ range. While the optimum catalyst has yet to be estab lished, the results demonstrate that alkali (as K2O) plays a significant role in enhancing the selectivity.TTistorically, the sources of petrochemical feedstocks have been related directly to the supply of petroleum. Initially, liquified petroleum gases (LPG) supplied this need. Later, as the supply of LPG diminished, naphthas became the primary source (I). The 1973 Arab oil embargo dramatically demonstrated the critical need for alternative sources of fossil carbon. Thus, any development to reduce our dependence on foreign suppliers of petroleum, e.g., an economic coal-based process, should have high priority (2). Hence, there has been a renewal of interest in Fischer-Tropsch processes (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), the catalytic synthesis of primarily C5-C11 hydrocarbons from CO-H2 mixtures. Unfortunately, economic considerations indicate that a synthetic naphtha as cracker feedstock for American Chemical 0-8412-04^^j^3jlfm.â4^$05.00/0

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Products of the Hydrogenation of Carbon Monoxide over an Iron Catalyst - Aliphatic and Alicyclic Hydrocarbons

Cited by 54 publications

References 9 publications

Applications of isotopic tracers in Fischer–Tropsch synthesis

Applications of isotopic tracers in Fischer–Tropsch synthesis

Mechanism Studies of the Fischer-Tropsch Synthesis. The Addition of Radioactive Methanol, Carbon Dioxide and Gaseous Formaldehyde

Cobalt-Based Catalysts for the Production of C₂-C₄ Hydrocarbons from Syn-Gas

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Products of the Hydrogenation of Carbon Monoxide over an Iron Catalyst - Aliphatic and Alicyclic Hydrocarbons

Cited by 54 publications

References 9 publications

Applications of isotopic tracers in Fischer–Tropsch synthesis

Applications of isotopic tracers in Fischer–Tropsch synthesis

Mechanism Studies of the Fischer-Tropsch Synthesis. The Addition of Radioactive Methanol, Carbon Dioxide and Gaseous Formaldehyde

Cobalt-Based Catalysts for the Production of C2-C4 Hydrocarbons from Syn-Gas

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Product

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Cobalt-Based Catalysts for the Production of C₂-C₄ Hydrocarbons from Syn-Gas