Durable power performance of a direct ash-free coal fuel cell

Abstract We have investigated the comparable performance of raw and ash-free coal in the operation of a direct carbon fuel cell (DCFC). The various structural and morphological analyses using SEM, TEM, EDX, XPS, XRD, and TGA are carried out to study the distinct physicochemical properties of coals. Due to contained volatile organic compounds, raw coal generates about a two-fold higher fuel cell performance compare to ash-free coal below a reaction temperature of 750 °C. However, over a cell temperature of 900 °C, both of them reach a similar power density of 170 mW cm −2 . In the long-term operation of a DCFC, we observe a distinctly more durable power performance using ash-free coal than that of raw coal.

[1]  S. Chuang,et al.  Effect of gas flow rates and Boudouard reactions on the performance of Ni/YSZ anode supported solid , 2011 .

[2]  M. Thring.  World Energy Outlook , 1977 .

[3]  Xiang Li,et al.  Evaluation of raw coals as fuels for direct carbon fuel cells , 2010 .

[4]  Hokyung Choi,et al.  Characterization of chars made of solvent extracted coals , 2012, Korean Journal of Chemical Engineering.

[5]  Alan F. Jankowski,et al.  Direct Conversion of Carbon Fuels in a Molten Carbonate Fuel Cell , 2004 .

[6]  Turgut M. Gür,et al.  Conversion of Solid Carbonaceous Fuels in a Fluidized Bed Fuel Cell , 2008 .

[7]  M. Ishida,et al.  Performance of an internal direct-oxidation carbon fuel cell and its evaluation by graphic exergy analysis , 1988 .

[8]  R. Song,et al.  Enhanced anode interface for electrochemical oxidation of solid fuel in direct carbon fuel cells: The role of liquid Sn in mixed state , 2011 .

[9]  Shaomin Liu,et al.  Factors That Determine the Performance of Carbon Fuels in the Direct Carbon Fuel Cell , 2008 .

[10]  D. Shen,et al.  Preparation of Bamboo-Based Activated Carbon and Its Application in Direct Carbon Fuel Cells , 2011 .

[11]  D. G. Vutetakis,et al.  Electrochemical Oxidation of Molten Carbonate‐Coal Slurries , 1987 .

[12]  Turgut M. Gür,et al.  High performance solid oxide fuel cell operating on dry gasified coal , 2010 .

[13]  K. Sasaki,et al.  Re-analysis of defect equilibria and transport parameters in Y2O3-stabilized ZrO2 using EPR and optical relaxation , 2000 .

[14]  S. Chuang,et al.  Analysis of gas products from direct utilization of carbon in a solid oxide fuel cell , 2012 .

[15]  Normand M. Laurendeau,et al.  Heterogeneous Kinetics of Coal Char Gasification and Combustion , 1979 .

[16]  Xiang Li,et al.  Modification of coal as a fuel for the direct carbon fuel cell. , 2010, The journal of physical chemistry. A.

[17]  Jiang Liu,et al.  Effect of anode and Boudouard reaction catalysts on the performance of direct carbon solid oxide fuel cells , 2010 .

[18]  Jae Kwang Lee,et al.  Influence of copper oxide modification of a platinum cathode on the activity of direct methanol fuel cell , 2007 .

[19]  Judith Gurney.  BP Statistical Review of World Energy , 1985 .

[20]  J. Deventer,et al.  Microstructural characterisation of geopolymers synthesised from kaolinite/stilbite mixtures using XRD, MAS-NMR, SEM/EDX, TEM/EDX, and HREM , 2002 .

[21]  B. Zhu,et al.  Carbon anode in direct carbon fuel cell , 2010 .

[22]  Jaeyoung Lee,et al.  Highly effective anode structure in a direct formic acid fuel cell , 2008 .

[23]  K. H. van Heek,et al.  Structure and pyrolysis behaviour of different coals and relevant model substances , 1994 .

[24]  N. Cai,et al.  Studies on the carbon reactions in the anode of deposited carbon fuel cells , 2008 .

[25]  Raymond J. Gorte,et al.  Effect of Precious-Metal Dopants on SOFC Anodes for Direct Utilization of Hydrocarbons , 2003 .

[26]  S. Jeong,et al.  Production of low ash coal by thermal extraction with N-methyl-2-pyrrolidinone , 2008 .

[27]  C. Jeon,et al.  Feasibility of using ash-free coal in a solid-oxide-electrolyte direct carbon fuel cell , 2012 .

[28]  Y. Sekine,et al.  Reactivity and structural change of coal char during steam gasification , 2005 .

[29]  Rahul Singh,et al.  Direct Use of Sulfur-Containing Coke on a Ni―Yttria-Stabilized Zirconia Anode Solid Oxide Fuel Cell , 2011 .

[30]  J. Vohs,et al.  Molten silver as a direct carbon fuel cell anode , 2012 .

[31]  Wenhua Geng,et al.  Analysis of hydrothermally-treated and weathered coals by X-ray photoelectron spectroscopy (XPS) , 2009 .

[32]  Guiling Wang,et al.  Direct carbon fuel cell: Fundamentals and recent developments , 2007 .

[33]  E. M. Patton,et al.  Carbon–air fuel cell without a reforming process , 2004 .

[34]  Turgut M. Gür,et al.  Carbon monoxide-fueled solid oxide fuel cell , 2010 .

[35]  Xiang Li,et al.  Surface modification of carbon fuels for direct carbon fuel cells , 2009 .

[36]  U. Stimming,et al.  Direct carbon conversion in a SOFC-system with a non-porous anode , 2010 .