Analysis of gas products from direct utilization of carbon in a solid oxide fuel cell

Siengchum, Tritti; Guzmán, Felipe; Chuang, Steven S. C.

doi:10.1016/j.jpowsour.2012.04.020

Cited by 46 publications

(35 citation statements)

References 28 publications

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“…The gases produced from fuels are important to predict performance because partial pressure has a direct influence on the potentials. T. Siengchum et al investigated the performance of solid carbon, H 2 , CO, and CO 2 based on SOFC [18]. They reported that solid carbon fuels show the lowest performance in comparison with H 2 , CO, and CO 2 .…”

Section: Fuel Gasificationmentioning

confidence: 99%

Effect of Coal Gases on Electrochemical Reactions in the Direct Carbon Fuel Cell System

Eom¹,

Ahn²,

Rhie³

et al. 2015

JOCET

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Abstract-Various carbonaceous fuels were evaluated in a Direct Carbon Fuel Cell (DCFC) system as energy sources. In order to investigate the characteristics of electrochemical reaction of various fuels in DCFC, three coals, such as Shenhua coal, Adaro coal, and Openblue coal which have different content of fixed carbon and volatile matter, were selected in this research. The characteristics of electrochemical reactions of fuels were investigated at 700℃ by potentiostatic method of the fuel cell and the effect of fuels properties is also discussed. The effect of gases from coals was investigated by using raw coal state and char state in present work. The gases, such as H 2 , CH 4 , CO and CO 2 , were detected in the exhaust gas of anode side by thermal decomposition of coal. It is confirmed that these gases have an effect on the electrochemical reaction on DCFC system by comparing of current density of raw coal and char.

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Section: Fuel Gasificationmentioning

confidence: 99%

Effect of Coal Gases on Electrochemical Reactions in the Direct Carbon Fuel Cell System

Eom¹,

Ahn²,

Rhie³

et al. 2015

JOCET

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“…Then 0.5 mL PVB ethanol solution (concentration: 6 wt.%) was added into the mixed powder drop by drop under grinding until it became agglomerated and homogeneous. Afterward, it was dried under an infrared lamp for 0.5 h. For the fourth kind, denoted as C-4, Fe catalyst was loaded on carbon by the conventional infiltration technique [28,31]: Carbon powder was immerged into Fe(NO 3 ) 3 solution under stirring and let stand overnight so that carbon powder could adsorb Fe 3+ , followed by heating at 90°C until the water of the mixture was evaporated. Then the residue was heat-treated at 700°C for 60 min under Ar atmosphere to decompose the nitrate.…”

Section: Preparation Of Carbon Fuelmentioning

confidence: 99%

“…The conventional way to load catalyst on activated carbon fuel for DC-SOFCs is impregnation [26,28,31], in which iron nitrate solution is mixed with activated carbon powder followed by drying at 80°C and heat treating with flowing Ar at 700°C. This method is complicated (3 steps), costly, and with NO x pollution.…”

Section: Introductionmentioning

confidence: 99%

A facile method of preparing Fe-loaded activated carbon fuel for direct carbon solid oxide fuel cells

Cai

Zhou

Xie

et al. 2015

Fuel

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“…Similarly, investigations including the introduction of CO over a carbon bed, such as illustrated in Fig. 7, are relatively limited [5,25,51]. Siengchum et al (2012) reported on an SOFC-type DCFC consisting of coconut biochar in contact with a Ag-impregnated Ni-YSZ anode (750 C) under 7.4% CO, 8.6% CO 2 or pure He [51].…”

Section: Sweep Gas: N 2 Eco 2 and Coecomentioning

confidence: 99%

“…7, are relatively limited [5,25,51]. Siengchum et al (2012) reported on an SOFC-type DCFC consisting of coconut biochar in contact with a Ag-impregnated Ni-YSZ anode (750 C) under 7.4% CO, 8.6% CO 2 or pure He [51]. More recently, Werhahn et al (2013) have shown the effects of anode sweep gas (CO, CO 2 , 50e50 vol% COeCO 2 , Ar or He) and anode layer catalyst (porous GDC anode vs. dense scandia-doped zirconia (SSZ) electrolyte layer) for carbon black (Printex 90) at 950 C [25].…”

Section: Sweep Gas: N 2 Eco 2 and Coecomentioning

confidence: 99%

Hybrid direct carbon fuel cell anode processes investigated using a 3-electrode half-cell setup

Deleebeeck

Arenillas

Menéndez

2015

International Journal of Hydrogen Energy

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Cyclic voltammetry (CV) Bituminous coal Carbon monoxide Carbon dioxide a b s t r a c t A 3-electrode half-cell setup consisting of a yttria-stabilized zirconia (YSZ) electrolyte support was employed to investigate the chemical and electrochemical processes occurring in the vicinity of a model hybrid direct carbon fuel cell (HDCFC) anode (Ni-YSZ) in contact with a molten carbon-alkali carbonate slurry. Electrochemical testing, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), with and without the Ni-YSZ layer highlighted the promotional effect of the Ni-YSZ anode layer, and revealed the contributions of Ni/NiO, and potentially K/K 2 O, redox couple(s). Treated anthracite and bituminous coals, as well as carbon black, were tested, revealing similar open circuit potential and activation energies in mixed 96e4 vol% N 2 eCO 2 and 50e50 vol% COeCO 2 environments between 700 and 800 C. Bituminous coal showed the highest activity, likely associated to a high O/C ratio and hydrogen content. Based on acquired data, a reaction scheme was proposed for processes at the working electrode, including the role of bubble formation in the vicinity of the electrochemically active solid/molten medium interface.

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Analysis of gas products from direct utilization of carbon in a solid oxide fuel cell

Cited by 46 publications

References 28 publications

Effect of Coal Gases on Electrochemical Reactions in the Direct Carbon Fuel Cell System

Effect of Coal Gases on Electrochemical Reactions in the Direct Carbon Fuel Cell System

A facile method of preparing Fe-loaded activated carbon fuel for direct carbon solid oxide fuel cells

Hybrid direct carbon fuel cell anode processes investigated using a 3-electrode half-cell setup

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