Fischer–Tropsch synthesis on a ruthenium catalyst in two-phase systems: an excellent opportunity for the control of reaction rate and selectivity

2014 ◽  
Vol 4 (9) ◽  
pp. 2896-2899 ◽  
Author(s):  
Vitaly V. Ordomsky ◽  
Andrei Y. Khodakov ◽  
Benoit Legras ◽  
Christine Lancelot
Keyword(s):  
Organic Phase ◽  
Reaction Rate ◽  
High Selectivity ◽  
Fischer Tropsch ◽  
Two Phase ◽  
Fischer Tropsch Synthesis ◽  
Excellent Opportunity ◽  
Phase Systems ◽  
Biphasic Systems ◽  
Long Chain

Localization of Ru/C in the organic phase in biphasic systems leads to high selectivity to long-chain hydrocarbons similar to that in the organic phase at a higher overall Fischer–Tropsch reaction rate.

Influence of the formation of short-chain olefins by manganese/cobalt-catalyzed Fischer–Tropsch synthesis on the selectivity and effective reaction rate

2020 ◽  
Vol 10 (2) ◽  
pp. 475-483
Author(s):  
Dominik Schröder ◽  
Johannes Thiessen ◽  
Andreas Jess ◽  
Judith Scholz
Keyword(s):  
Low Temperature ◽  
Reaction Rate ◽  
High Selectivity ◽  
Cobalt Catalysts ◽  
Short Chain ◽  
Industrial Scale ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Effective Reaction ◽  
Effective Reaction Rate

For cobalt catalysts with manganese as promoter, a high selectivity to olefins is found in low-temperature FTS over small catalyst particles. With industrial scale particles severe changes in selectivity and an increase of reaction rate is found.

Mastering a biphasic single-reactor process for direct conversion of glycerol into liquid hydrocarbon fuels

2014 ◽  
Vol 16 (4) ◽  
pp. 2128-2131 ◽  
Author(s):  
V. V. Ordomsky ◽  
A. Y. Khodakov
Keyword(s):  
Aqueous Phase ◽  
Liquid Hydrocarbon ◽  
Direct Conversion ◽  
Tropsch Synthesis ◽  
Hydrocarbon Fuels ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Aqueous Phase Reforming ◽  
Long Chain

Combination of aqueous-phase reforming of glycerol and Fischer–Tropsch synthesis in a single biphasic reactor in the presence of an acid leads to formation of long chain alkanes.

The role of carbon atoms of supported iron carbides in Fischer–Tropsch synthesis

2015 ◽  
Vol 5 (3) ◽  
pp. 1433-1437 ◽  
Author(s):  
V. V. Ordomsky ◽  
B. Legras ◽  
K. Cheng ◽  
S. Paul ◽  
A. Y. Khodakov
Keyword(s):  
Reaction Rate ◽  
Iron Carbide ◽  
High Reactivity ◽  
Tropsch Synthesis ◽  
Chain Growth ◽  
Fischer Tropsch ◽  
Iron Carbides ◽  
Fischer Tropsch Synthesis ◽  
Supported Iron

High reactivity of iron carbides enhances the Fischer–Tropsch reaction rate on supported iron catalysts. Carbon atoms in iron carbide are involved in the initiation of chain growth in Fischer–Tropsch synthesis.

Study of reactions in two-phase systems hydrolysis of triphenylmethyl chloride in water-organic solvent systems

1982 ◽  
Vol 47 (11) ◽  
pp. 2904-2911 ◽  
Author(s):  
Jaroslav Šilhánek ◽  
Lenka Konrádová ◽  
Olga Šimečková ◽  
Josef Horák
Keyword(s):  
Organic Solvent ◽  
Aqueous Phase ◽  
Reaction Rate ◽  
Two Phase ◽  
Rate Determining Step ◽  
Hydrolytic Reaction ◽  
Rate Of Hydrolysis ◽  
Solvent Systems ◽  
Phase Systems ◽  
Hydrolysis Of

The rate of hydrolysis was studied for triphenylmethyl chloride in water-organic solvent systems with an unstirred interface of a known area. The hydrolytic reaction was found to take place at the interface only. The temperature dependence of the reaction rate indicates that at lower temperatures (up to 60 °C) the rate-determining step is the chemical reaction, whereas at higher temperatures a deviation from the Arrhenius type dependence is observed, which along with the low activation energy value points to the diffusion as the governing phenomenon. The effect of salts added to the aqueous phase is consistent with the expected behaviour for the SN1 mechanism, but suprising is the inhibiting effect od some quaternary ammonium salts. In the study of the effect of the organic solvent, the reaction rate was found to correlate satisfactorily with the solubility of the organic solvent in water, but no correlation was established with the solubility of water in the solvent. From the results obtained it can be inferred that the reaction site is the laminary layer adjacent to the interface from the aqueous phase side.

Effect of Diffusion Limitations on the Fischer–Tropsch Synthesis of Long-Chain Hydrocarbons on a Cobalt–Alumina Silica Gel Catalyst

2018 ◽  
Vol 10 (3) ◽  
pp. 181-184 ◽  
Author(s):  
A. P. Savost’yanov ◽  
G. B. Narochnyi ◽  
R. E. Yakovenko ◽  
V. N. Soromotin ◽  
I. N. Zubkov
Keyword(s):  
Silica Gel ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Diffusion Limitations ◽  
Long Chain

Nucleophilic degradation of diazinon in thermoreversible polymer–polymer aqueous biphasic systems

2021 ◽  
Vol 23 (7) ◽  
pp. 4133-4140
Author(s):  
Daniela Millan ◽  
Mafalda R. Almeida ◽  
Ana F. C. S. Rufino ◽  
João A. P. Coutinho ◽  
Mara G. Freire
Keyword(s):  
Reaction Products ◽  
Two Phase ◽  
Separation Processes ◽  
Aqueous Biphasic Systems ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Aqueous Biphasic ◽  
Biphasic Systems

Polymer–polymer aqueous two-phase systems involve thermoreversible reaction–separation processes in the nucleophilic degradation of diazinon and further separation of the reaction products.

Selectivity shift from paraffins to α-olefins in low temperature Fischer–Tropsch synthesis in the presence of carboxylic acids

2018 ◽  
Vol 54 (19) ◽  
pp. 2345-2348 ◽  
Author(s):  
B. Gu ◽  
A. Y. Khodakov ◽  
V. V. Ordomsky
Keyword(s):  
Low Temperature ◽  
Carboxylic Acids ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Co Catalysts ◽  
Long Chain

A shift to long chain α-olefins has been observed during Fischer–Tropsch synthesis over Co catalysts in the presence of carboxylic acids.

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