Modeling and control of a Fischer-Tropsch synthesis fixed-bed reactor with a novel mechanistic kinetic approach

Méndez, César I.; Ancheyta, Jorge

doi:10.1016/j.cej.2020.124489

Cited by 15 publications

(9 citation statements)

References 31 publications

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“…Typically, methanation is carried out in a thermochemical catalytic reactor in the temperature range of 250-350°C and 25 bar pressure by either CO 2 hydrogenation (Mills and Steffgen, 1974;Wei and Jinlong, 2011;Junaedi et al, 2014;El Sibai et al, 2015) via the Sabatier process (Eq. 1) or CO hydrogenation (Anderson et al, 1984;Schulz, 1999;Van Der Laan and Beenackers, 1999;Méndez and Ancheyta, 2020) via the Fischer-Tropsch process (Eq. 2).…”

Section: Purely Thermochemical Route Of Methane Synthesismentioning

confidence: 99%

A Review on Synthesis of Methane as a Pathway for Renewable Energy Storage With a Focus on Solid Oxide Electrolytic Cell-Based Processes

et al. 2020

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Environmental issues related to global warming are constantly pushing the fossil fuelbased energy sector toward an efficient and economically viable utilization of renewable energy. However, challenges related to renewable energy call for alternative routes of its conversion to fuels and chemicals by an emerging Power-to-X approach. Methane is one such high-valued fuel that can be produced through renewables-powered electrolytic routes. Such routes employ alkaline electrolyzers, proton exchange membrane electrolyzers, and solid oxide electrolyzers, commonly known as solid oxide electrolysis cells (SOECs). SOECs have the potential to utilize the waste heat generated from exothermic methanation reactions to reduce the expensive electrical energy input required for electrolysis. A further advantage of an SOEC lies in its capacity to coelectrolyze both steam and carbon dioxide as opposed to only water, and this inherent capability of an SOEC can be harnessed for in situ synthesis of methane within a single reactor. However, the concept of in situ methanation in SOECs is still at a nascent stage and requires significant advancements in SOEC materials, particularly in developing a cathode electrocatalyst that demonstrates activity toward both steam electrolysis and methanation reactions. Equally important is the appropriate reactor design along with optimization of cell operating conditions (temperature, pressure, and applied potential). This review elucidates those developments along with research and

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Section: Purely Thermochemical Route Of Methane Synthesismentioning

confidence: 99%

A Review on Synthesis of Methane as a Pathway for Renewable Energy Storage With a Focus on Solid Oxide Electrolytic Cell-Based Processes

et al. 2020

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“…Multiphase reactors, including fixed bed, fluidized bed, and slurry bubble column (as shown in Figure ), are being extensively used in a wide variety of chemical, coal chemical, biochemical, and petrochemical industries, particularly in hydrogenation reactions, , fermentation processes, Fischer–Tropsch (F-T) syntheses, , coal liquefaction processes, and alcohol and ether syntheses. − These reactors differ largely in terms of the means to control the temperature and the choice of catalyst . Compared with fixed bed and fluidized bed reactors, bubble column reactors and slurry bubble column reactors (BCR/SBCRs) have many advantages, such as simple construction, plug-free operation, online catalyst addition, excellent mass transfer and heat transfer characteristics, and withdrawal ability.…”

Section: Introductionmentioning

confidence: 99%

“…Multiphase reactors, including fixed bed, 1 fluidized bed, 2 and slurry bubble column (as shown in Figure 1), 3 are being extensively used in a wide variety of chemical, coal chemical, biochemical, and petrochemical industries, particularly in hydrogenation reactions, 4,5 fermentation processes, 6 Fischer− Tropsch (F-T) syntheses, 7,8 coal liquefaction processes, 9 and alcohol and ether syntheses. 10−12 These reactors differ largely in terms of the means to control the temperature and the choice of catalyst.…”

Section: Introductionmentioning

confidence: 99%

Review on the Effect of Gas Distributor on Flow Behavior and Reaction Performance of the Bubble/Slurry Reactors

Zhao

Lian

et al. 2021

Ind. Eng. Chem. Res.

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Gas distributors greatly affect the performance of bubble column or slurry bubble column reactors (BCR/SBCRs). Investigation of design parameters characterizing the operation and transport phenomena of gas distributors in BCR/SBCRs can lead to a better understanding of hydrodynamic properties and mass transfer mechanisms. The performance of gas distributors is often described using various mathematical models and computational fluid dynamics simulations supported by experimental research. Nonetheless, little effort has been made to review the effect of the configurations of gas distributors on BCR/SBCR performance. The negative consequences of weeping and uneven gas maldistribution caused by unreasonable design of the distributor were rarely appreciated. This paper reviews the effects of gas distributor configuration on flow behavior and reaction performance. Adequate information about the design and development of gas distributor technology in BCR/SBCRs is provided. Some suggestions for potential research to better comprehend the effects of gas distributor design are put forward.

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“…The alternative technology of using syngas to produce hydrocarbons (both for bulk/fine chemical manufacturing and energy consumption) via one of the most commercial viable process (Fischer–Tropsch, FT synthesis) shows its merit in tackling thee thorny problems for many countries with poor oil reserve. − The kinetic modeling of Fischer–Tropsch (FT) synthesis is the cornerstone for sizing and process design of gas to liquid (GTL) technology. − …”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Product Distribution Using Various Data-Driven and Statistical Models for Fischer–Tropsch Synthesis

Wang

Zhang

et al. 2021

ACS Omega

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Three modeling techniques, namely, a radial basis function neural network (RBFNN), a comprehensive kinetic with genetic algorithm (CKGA), and a response surface methodology (RSM), were used to study the kinetics of Fischer−Tropsch (FT) synthesis. Using a 29 × 37 (4 independent process parameters as inputs and corresponding 36 responses as outputs) matrix with total 1073 data sets for data training through RBFNN, the established model is capable of predicting hydrocarbon product distribution i.e., the paraffin formation rate (C 2 −C 15 ) and the olefin to paraffin ratio (OPR) within acceptable uncertainties. With additional validation data sets (15 × 36 matrix with total 540 data sets), the uncertainties of using three different models were compared and the outcomes were: RBFNN (±5% uncertainties), RSM (±10% uncertainties), and CKGA (±30% uncertainties), respectively. A new effective strategy for kinetic study of the complex FT synthesis is proposed: RBFNN is used for data matrix generation with a limited number of experimental data sets (due to its fast converge and less computation time), CKGA is used for mechanism selections by the Langmuir−Hinshelwood−Hougen−Watson (LHHW) approach using a genetic algorithm to find out potential reaction pathways, and RSM is used for statistical analysis of the investigated data matrix (generated from RBFNN through central composite design) upon responses and subsequent singular/multiple optimizations. The proposed strategy is a very useful and practical tool in process engineering design and practice for the product distribution during FT synthesis.

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Modeling and control of a Fischer-Tropsch synthesis fixed-bed reactor with a novel mechanistic kinetic approach

Cited by 15 publications

References 31 publications

A Review on Synthesis of Methane as a Pathway for Renewable Energy Storage With a Focus on Solid Oxide Electrolytic Cell-Based Processes

A Review on Synthesis of Methane as a Pathway for Renewable Energy Storage With a Focus on Solid Oxide Electrolytic Cell-Based Processes

Review on the Effect of Gas Distributor on Flow Behavior and Reaction Performance of the Bubble/Slurry Reactors

Kinetic Study of Product Distribution Using Various Data-Driven and Statistical Models for Fischer–Tropsch Synthesis

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