A Finite Volume SOFC Model for Coal-Based Integrated Gasification Fuel Cell System Analysis

2010 ◽

Vol 7 (4) ◽

Cited By ~ 18

Author(s):

Mu Li ◽

James D. Powers ◽

Jacob Brouwer

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cells ◽

Finite Volume ◽

Systems Analysis ◽

Coal Gasification ◽

System Analysis ◽

Analysis Tool ◽

Flow Sheet ◽

Metallic Interconnects ◽

Integrated Gasification

Integrated gasification fuel cell (IGFC) systems combining coal gasification and solid oxide fuel cells (SOFC) are promising for highly efficient and environmentally friendly utilization of coal for power production. Most IGFC system analyses performed to-date have used nondimensional thermodynamic SOFC models that do not resolve the intrinsic constraints of SOFC operation. In this work a quasi-two-dimensional (2D) finite volume model for planar SOFC is developed and verified using literature data. Special attention is paid to making the model capable of supporting recent SOFC technology improvements, including the use of anode-supported configurations, metallic interconnects, and reduced polarization losses. Activation polarization parameters previously used for high temperature electrolyte-supported SOFC result in cell performance that is much poorer than that observed for modern intermediate temperature anode-supported configurations; thus, a sensitivity analysis was conducted to identify appropriate parameters for modern SOFC modeling. Model results are shown for SOFC operation on humidified H2 and CH4 containing syngas, under coflow and counterflow configurations; detailed internal profiles of species mole fractions, temperature, current density, and electrochemical performance are obtained. The effects of performance, fuel composition, and flow configuration of SOFC performance and thermal profiles are evaluated, and the implications of these results for system design and analysis are discussed. The model can be implemented not only as a stand-alone SOFC analysis tool, but also a subroutine that can communicate and cooperate with chemical flow sheet software seamlessly for convenient IGFC system analysis.

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Development of catalytic combustion and CO2 capture and conversion technology

International Journal of Coal Science & Technology ◽

10.1007/s40789-021-00444-2 ◽

2021 ◽

Author(s):

Zhibin Yang ◽

Ze Lei ◽

Ben Ge ◽

Xingyu Xiong ◽

Yiqian Jin ◽

...

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Catalytic Combustion ◽

Coal Gasification ◽

Solid Oxide ◽

Multi Scale ◽

Electrolysis Cells ◽

Integrated Gasification ◽

Solid Oxide Electrolysis Cells ◽

Sofc Stacks

AbstractChanges are needed to improve the efficiency and lower the CO2 emissions of traditional coal-fired power generation, which is the main source of global CO2 emissions. The integrated gasification fuel cell (IGFC) process, which combines coal gasification and high-temperature fuel cells, was proposed in 2017 to improve the efficiency of coal-based power generation and reduce CO2 emissions. Supported by the National Key R&D Program of China, the IGFC for near-zero CO2 emissions program was enacted with the goal of achieving near-zero CO2 emissions based on (1) catalytic combustion of the flue gas from solid oxide fuel cell (SOFC) stacks and (2) CO2 conversion using solid oxide electrolysis cells (SOECs). In this work, we investigated a kW-level catalytic combustion burner and SOEC stack, evaluated the electrochemical performance of the SOEC stack in H2O electrolysis and H2O/CO2 co-electrolysis, and established a multi-scale and multi-physical coupling simulation model of SOFCs and SOECs. The process developed in this work paves the way for the demonstration and deployment of IGFC technology in the future.

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Comparison of Preanode and Postanode Carbon Dioxide Separation for IGFC Systems

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4000140 ◽

2010 ◽

Vol 132 (6) ◽

Cited By ~ 9

Author(s):

Eric Liese

Keyword(s):

Fuel Cell ◽

Power Density ◽

Co2 Capture ◽

Coal Gasification ◽

Combined Cycle ◽

Energy Technology ◽

Integrated Gasification Combined Cycle ◽

Lower Efficiency ◽

Integrated Gasification ◽

Cold Gas

This paper examines the arrangement of a solid oxide fuel cell (SOFC) within a coal gasification cycle, this combination generally being called an integrated gasification fuel cell cycle. This work relies on a previous study performed by the National Energy Technology Laboratory (NETL) that details thermodynamic simulations of integrated gasification combined cycle (IGCC) systems and considers various gasifier types and includes cases for 90% CO2 capture (2007, “Cost and Performance Baseline for Fossil Energy Plants, Vol. 1: Bituminous Coal and Natural Gas to Electricity,” National Energy Technology Laboratory Report No. DOE/NETL-2007/1281). All systems in this study assume a Conoco Philips gasifier and cold-gas clean up conditions for the coal gasification system (Cases 3 and 4 in the NETL IGCC report). Four system arrangements, cases, are examined. Cases 1 and 2 remove the CO2 after the SOFC anode. Case 3 assumes steam addition, a water-gas-shift (WGS) catalyst, and a Selexol process to remove the CO2 in the gas cleanup section, sending a hydrogen-rich gas to the fuel cell anode. Case 4 assumes Selexol in the cold-gas cleanup section as in Case 3; however, there is no steam addition, and the WGS takes places in the SOFC and after the anode. Results demonstrate significant efficiency advantages compared with IGCC with CO2 capture. The hydrogen-rich case (Case 3) has better net electric efficiency compared with typical postanode CO2 capture cases (Cases 1 and 2), with a simpler arrangement but at a lower SOFC power density, or a lower efficiency at the same power density. Case 4 gives an efficiency similar to Case 3 but also at a lower SOFC power density. Carbon deposition concerns are also discussed.

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Numerical Modeling and Performance Prediction of COS Hydrolysis Reactor in an Integrated Gasification Fuel Cell in terms of Thermo-Chemical Transport Phenomena

Applied Sciences ◽

10.3390/app8071196 ◽

2018 ◽

Vol 8 (7) ◽

pp. 1196 ◽

Cited By ~ 1

Author(s):

Jung-Hun Noh ◽

Dong-Shin Ko ◽

Seung-Jong Lee ◽

Deog-Jae Hur

Keyword(s):

Power Generation ◽

Numerical Modeling ◽

Fuel Cell ◽

Space Velocity ◽

Cell System ◽

Design Parameters ◽

Reactor Performance ◽

Chemical Reaction Kinetics ◽

Cos Hydrolysis ◽

Integrated Gasification

During the recent decades, global warming by greenhouse gas evolution has attracted worldwide attention and ever increasing strict regulations thereon have become institutionalized as international policies. In the process, more environment-friendly power generation technologies have been developed utilizing fossil fuels with a view to timely commercialization. As one such “clean coal” technology, an Integrated Gasification Fuel Cell system is a promising power generation means where a carbonyl sulfide (COS) hydrolysis reactor is installed downstream of coal syngas to remove acidic gas constituents such as H2S and COS. The most significant design parameters affecting performance of the COS hydrolysis reactor were selected to be gas hourly space velocity (GHSV), reaction temperature, and length ratio, and numerical modeling was performed considering heat and fluid flow transfer as well as chemical reaction kinetics. Effect of the selected design parameters on the variation of conversion rate and reactant gas mixture concentration were comprehensively investigated to predict performance of the COS hydrolysis reactor. Stochastic modeling of reactor performance was finally performed using Monte Carlo simulation and linear regression fitting.

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Influence of Convective Heat Transfer by Air Flow on Local Current/Temperatures along Microtubular Solid Oxide Fuel Cells In-situ Identified by Electrodesegmentation Method for Co- and Counter-flow Configurations

ECS Meeting Abstracts ◽

10.1149/ma2015-03/1/270 ◽

2015 ◽

Keyword(s):

Heat Transfer ◽

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Convective Heat Transfer ◽

Solid Oxide ◽

Oxide Fuel ◽

Counter Flow ◽

Local Current ◽

Flow Configurations

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Advanced Ceramic Fuel Cell R&D

2nd International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2004-2499 ◽

2004 ◽

Cited By ~ 1

Author(s):

Bin Zhu

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cells ◽

Ceramic Composite ◽

Cell System ◽

Ion Conduction ◽

Advanced Ceramic ◽

Oxygen Ion ◽

Ceramic Fuel Cell ◽

Ceramic Fuel ◽

New Generation

Since many years in Swedish national research project and Swedish-Chinese research framework we have carried out advanced ceramic fuel cell research and development, targeting for intermediate and low temperature ceramic or solid oxide fuel cells (ILTCFCs or ILTSOFCs, 300–700°C) based on ceramic-based composite materials. The ceramic composite material developments in Sweden have been experienced from the oxyacid-salts oxide proton-based conductors, non-oxide containment salts, the ceria-based composite electrolytes and nano-composites. Among them the ceria-based composites showed excellent ionic conductivity of 0.01 to 1 Scm−1 and ILTCFCs using these composites as electrolytes have achieved high performances of 200 to 1000 mWcm−2 at temperatures between 400 and 700°C. The excellent ion conduction was resulted from hybrid proton and oxygen ion conduction. The hybrid ion conduction and dual electrode reactions and processes create a new fuel cell system. Advanced ceramic fuel cell aims at developing a new generation to realize the challenges for fuel cell commercialization. This paper reviews our more than 14 years R&D on the field with emphasis on the recent progresses and achievements.

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