Liquid-vapor thermodynamic equilibrium in Fischer-Tropsch synthesis products

Деревич, И. В.; Ermolaev, V. S.; Мордкович, В. З.

doi:10.1134/s0040579508020152

Cited by 19 publications

(13 citation statements)

References 3 publications

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“…Calculation of liquid-vapor thermodynamic equilibrium in Fischer-Tropsch synthesis products is carried out in accordance [24]. Modeling other thermo physical parameters of porous particle and diffusion coefficient Co and H 2 in catalytic particle are realized similarly [20].…”

Section: Discussionmentioning

confidence: 99%

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Temperature oscillation in a catalytic particle of Fischer–Tropsch synthesis

Деревич¹

2010

International Journal of Heat and Mass Transfer

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Section: Discussionmentioning

confidence: 99%

“…Solution of cubic algebraic equation (26) gives three roots for increment k 1 ; k 2 ; k 3 in (24). The initial fluctuations (24) will decay in time if real part of all roots k 1 ; k 2 ; k 3 will be positive.…”

Section: Model Descriptionmentioning

confidence: 99%

Temperature oscillation in a catalytic particle of Fischer–Tropsch synthesis

Деревич¹

2010

International Journal of Heat and Mass Transfer

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“…The product distribution of hydrocarbons is described by the Anderson-Schulz-Flory formula [1]. Calculations of thermodynamic equilibrium in hydrocarbon mixtures in liquid and vapor phases and thermophysical properties of paraffins composition are realized on the methods outlined by the authors [13,14]. The Figure 3 shows that for large values of the chain growth coefficient FT  it is increased the liquid fraction in the products of synthesis.…”

Section: Calculation Resultsmentioning

confidence: 99%

Hydrodynamic Limitations of Microchannel Fischer-Tropsch Reactor Operation

Деревич¹,

Ermolaerv²,

Мордкович³

2013

WJM

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The pressure drop in a microchannel Fischer-Tropsch reactor was investigated by means of a fluid dynamics model developed by the authors. The developed model takes into account roughness of the microchannel wall induced by catalyst particle deposition on the surface of the microchannel. The presented simulation procedure takes into account the variation of the synthesis product composition and the variation of thermal properties of the liquid and gas phases along the microchannel length as functions of pressure, temperature, conversion rate and chain growth coefficient. Liquid and gaseous products down flow are modeled in the annular flow approximation. The obtained results are presented for two general types of microchannels, i.e. for rough-walled and for smooth-walled microchannels. It is shown that fluid dynamics in rough-walled and smooth-walled microchannels are dramatically different. It is established that a mean critical diameter can be introduced. The microchannels with diameter below the mean critical value can experience operation difficulty due to by high aerodynamic resistance or can even become completely flooded.

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“…The thermodynamic properties of FTS products can be found in the literature for C ≤ 20, and Derevich et al [67] gives correlations for both paraffin and olefin products with C ≥ 20 for critical temperature and pressure. The group of Carl Yaws has produced numerous correlations for properties of hydrocarbons [68][69][70][71][72][73][74][75][76][77][78][79][80][81][82]and is used extensively in simulation of the example application of the model framework.…”

Section: Wang Et Al [43] Describes a Fts Fixed Bed Model Of The Clamentioning

confidence: 99%

A Fischer-Tropsch synthesis reactor model framework for liquid biofuels production.

Pratt¹

2012

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Fischer-Tropsch synthesis (FTS) is an attractive option in the process of converting biomass-derived syngas to liquid fuels in a small-scale mobile bio-refinery. Computer simulation can be an efficient method of designing a compact FTS reactor, but no known comprehensive model exists that is able to predict performance of the needed non-traditional designs.This work developed a generalized model framework that can be used to examine a variety of FTS reactor configurations. It is based on the four fundamental physics areas that underlie FTS reactors: momentum transport, mass transport, energy transport, and chemical kinetics, rather than empirical data of traditional reactors.The mathematics developed were applied to an example application and solved numerically using COMSOL. The results compare well to the literature and give insights into the operation of FTS that are then used to propose a new reactor concept that may be suitable for the mobile bio-refinery application. 4 AcknowledgementsI am deeply grateful to the Sandia LDRD office and the ECIS investment area for sponsoring this project.I would also like to thank the following people who participated in this project:• Chris Shaddix for his mentorship, both technically and personally, throughout the project.• Hank Westrich and Sheri Martinez at the LDRD Office for their assistance and encouragement.• Daniel Dedrick for his work in forming the concept of this LDRD topic.• Blake Simmons for providing project management so I could focus on the technical challenges.• Deanna Agosta for financial planning.• Tiffany Vargas and Karen McWilliams at the CA Technical Library for providing and/or helping me find the countless papers and texts used to develop my understanding of everything from the detailed theory to the history and applications of FTS. 5 SummaryLiquid fuels synthesized from renewable CO and H 2 could displace petroleum-based fuels to provide clean, renewable energy for the future. Small scale (<20 bbl/day) reactors for synthetic liquid fuels production are an emerging development area that may enable mobile biomass-to-liquids plants suited for on-demand liquid fuel production from diverse, underutilized, local resources. The design of such a "mobile bio-refinery" is a significant departure from the traditional large-scale industrial designs and requires predictive tools such as computer models to efficiently produce a successful facility. Because existing models inherently incorporate the empirical results of the traditional designs they are not suitable for this application. The need for a model that can examine the drastic design changes and innovations needed for the mobile bio-refinery is clear.The goal of this work was to create a gas-to-liquids synthesis model with the minimum amount of empiricism and assumptions allowed by the current state of the theory, through integrated physics component models across varying length scales, with the ultimate purpose being to enable design of efficient, durable, and flexible small scale and/or novel re...

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Liquid-vapor thermodynamic equilibrium in Fischer-Tropsch synthesis products

Cited by 19 publications

References 3 publications

Temperature oscillation in a catalytic particle of Fischer–Tropsch synthesis

Temperature oscillation in a catalytic particle of Fischer–Tropsch synthesis

Hydrodynamic Limitations of Microchannel Fischer-Tropsch Reactor Operation

A Fischer-Tropsch synthesis reactor model framework for liquid biofuels production.

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