Prospects for advanced coal-fuelled fuel cell power plants

Jansen, D.; Laag, P.C. van der; Oudhuis, A.B.J.; Ribberink, J.S.

doi:10.1016/0378-7753(93)01807-t

Cited by 27 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conceptual design and analyses of the integration of coal gasifiers with high temperature fuel cells have attracted much research interest around the world since the early 1990s and the results have clearly shown the potential of such systems for superior efficiency and emissions compared to other system approaches, including integrated gasification combined cycle (IGCC) systems [1][2][3][4][5][6][7][8][9][10]. Recently, IGFC systems that take advantage of more efficient catalytic gasifiers and the cooling caused by direct internal reforming (DIR) of CH 4 to reduce parasitic air compression load, have been proposed [11,12] and the electrical efficiency of such systems have been estimated to exceed or approach the U.S. Department of Energy (DOE) performance goal for next generation coal-based power plants: producing electricity at 60% efficiency (coal HHV basis) while capturing more than 90% of the inlet fuel carbon in a pure CO 2 stream [13].…”

Section: Introductionmentioning

confidence: 99%

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis

Brouwer

Rao

et al. 2011

Journal of Power Sources

View full text Add to dashboard Cite

a b s t r a c tIntegrated gasification fuel cell (IGFC) systems that combine coal gasification and solid oxide fuel cells (SOFC) are promising for highly efficient and environmentally sensitive utilization of coal for power production. Most IGFC system analysis efforts performed to-date have employed non-dimensional SOFC models, which predict SOFC performance based upon global mass and energy balances that do not resolve important intrinsic constraints of SOFC operation, such as the limits of internal temperatures and species concentrations. In this work, a detailed dimensional planar SOFC model is applied in IGFC system analysis to investigate these constraints and their implications and effects on the system performance. The analysis results further confirm the need for employing a dimensional SOFC model in IGFC system design. To maintain the SOFC internal temperature within a safe operating range, the required cooling air flow rate is much larger than that predicted by the non-dimensional SOFC model, which results in a larger air compressor design and operating power that significantly reduces the system efficiency. Options to mitigate the challenges introduced by considering the intrinsic constraints of SOFC operation in the analyses and improve IGFC design and operation have also been investigated. Novel design concepts that include staged SOFC stacks and cascading air flow can achieve a system efficiency that is close to that of the baseline analyses, which did not consider the intrinsic SOFC limitations.

show abstract

Section: Introductionmentioning

confidence: 99%

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis

Brouwer

Rao

et al. 2011

Journal of Power Sources

View full text Add to dashboard Cite

show abstract

“…This efficiency goal as set by the DOE is to account for any penalty associated with CO 2 separation but not that due to its compression to the sequestration pressure. Previous conceptual analyses of such IGFC plants have clearly shown the potential for improved efficiency and emissions relative to other system approaches [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], yet none of the research work published to date have demonstrated this performance goal, mostly due to the fact that even with highly efficient SOFC as the power block, CO 2 separation and the gasification process posed significant efficiency penalties on the system. Besides, integration of an SOFC power block with a gasification system is very different from the integration of gas turbine and steam turbine power blocks that are typical of an integrated gasification combined cycle (IGCC) plant due to the unique operating and control features of SOFC stacks.…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that high-temperature gas cleaning is more beneficial to the system's efficiency [3,15,17] but these technologies as pointed out previously are considered highly developmental for SOFC applications. In this work, conventional low-temperature gas cleaning technologies consisting of water scrubbing for removal of alkalis, halides and ammonia, activated carbon bed for removal of Hg and other volatile metals and Selexol TM process followed by ZnO guard bed for removal of sulfur compounds are employed due to their proven status.…”

Section: Gas Cleanup and Co 2 Separation Strategymentioning

confidence: 99%

“…Jansen et al [2] proposed an IGFC system featuring Shell oxygen blown dry feed entrained-flow gasifier, high-temperature gas cleaning with an operating temperature in the neighborhood of 350 • C and MCFC, and concluded that such a system could achieve electricity efficiency of 53.1% (LHV basis); he further investigated the feasibility of CO 2 capture downstream of the MCFC using shift reaction followed by ceramic CO 2 separation membrane and pointed out the system electricity efficiency would drop to 47.5% (LHV basis) due to the carbon capture. In a later paper Jansen et al [3] compared the effects of different gas cleaning processes on the performance of an IGFC system employing Texaco oxygen blown slurry feed entrained-flow gasifier and MCFC (with no carbon capture), and demonstrated that the IGFC system with high-temperature gas cleaning could achieve electricity efficiency of 53.2% (LHV basis) while employing the proven low-temperature gas cleaning would decrease the electricity efficiency to 49.2% (LHV basis).…”

Section: Igfc Development: a Literature Reviewmentioning

confidence: 99%

“…In 1992, the Electric Power Research Institute (EPRI) performed an evaluation study on the Westinghouse SOFC technology for electricity utility applications in Japan [3]. In this system, two Shell oxygen blown gasifiers were proposed for coal conversion and the SOFC system was composed of 96 modules generating 60% of the total electricity.…”

Section: Igfc Development: a Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Design of highly efficient coal-based integrated gasification fuel cell power plants

Rao

Brouwer

et al. 2010

Journal of Power Sources

View full text Add to dashboard Cite

a b s t r a c tIntegrated gasification fuel cell (IGFC) technology combining coal gasification and solid oxide fuel cell (SOFC) is believed to be the only viable solution to achieving U.S. Department of Energy (DOE)'s performance goal for next generation coal-based power plants, producing electricity at 60% efficiency (coal HHV-AC) while capturing more than 90% of the evolved CO 2 . Achieving this goal is challenging even with high performance SOFCs; design concepts published to date have not demonstrated this performance goal. In this work an IGFC system concept consisting of catalytic hydro-gasification, proven low-temperature gas cleaning and hybrid fuel cell-gas turbine power block (with SOFC operating at about 10 bar) is introduced. The system is demonstrating an electricity efficiency greater than 60% (coal HHV basis), with more than 90% of the carbon present in the syngas separated as CO 2 amenable to sequestration. A unique characteristic of the system is recycling de-carbonized, humidified anode exhaust back to the catalytic hydro-gasifier for improved energy integration. Alternative designs where: (1) anode exhaust is recycled directly back to SOFC stacks, (2) SOFC stack operating pressure is reduced to near atmospheric and (3) methanation reactor in the reactor/expander topping cycle is removed, have also been investigated and the system design and performance differences are discussed.

show abstract

Halide removal from coal‐derived syngas: review and thermodynamic considerations

Dolan

Ilyushechkin

McLennan

et al. 2011

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Halide species are one of the most abundant and damaging impurities in syngas derived from coal. Aside from environmental concerns, halides can cause irreversible damage to downstream processes such as particulate filters, catalysts, gas separation membranes, fuel cells and turbines. The current trend towards high‐temperature, dry gas cleaning is making solid sorbents increasingly favourable, and sorbent development must take into consideration the chemical, physical, efficiency and economic aspects of sorbent performance. This article reviews the origins of halides in coals, cleaning requirements and efforts to develop solid sorbents for halide removal for gasification processes. Most research effort to date has concerned (1) the performance and optimization of basic sorbents such as calcium and sodium carbonate and (2) determining the tolerances of catalysts, filters, fuel cells and other plant components to halide impurities. In addition, thermodynamic calculations have been used to compare the performance of a large number of potential sorbents examined using criteria such as conversion, speciation, volatility and regenerability. This exercise confirms alkali and alkaline earth carbonates exhibit the greatest halide conversion at the temperatures demanded by various downstream processes, but these species are not regenerable at high temperatures in the same manner as desulfurization sorbents. Although not previously investigated, scope exists for the investigation of barium carbonate for halide sorption. Halide removal is best performed preceding sulfur removal due to the irreversible inhibition of regenerable desulfurization sorbents by halide species. Copyright © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.

show abstract

Prospects for advanced coal-fuelled fuel cell power plants

Cited by 27 publications

References 0 publications

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis

Design of highly efficient coal-based integrated gasification fuel cell power plants

Halide removal from coal‐derived syngas: review and thermodynamic considerations

Contact Info

Product

Resources

About