The impact of physicochemical properties of coal on direct carbon solid oxide fuel cells

Dudek, Magdalena; Skrzypkiewicz, Marek; Moskała, N; Grzywacz, Przemysław; Sitarz, Maciej; Lubarska-Radziejewska, Iwona

doi:10.1016/j.ijhydene.2016.05.232

Cited by 16 publications

(10 citation statements)

References 40 publications

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“…It seems that Al 2 O 3 and SiO 2 , together with CaO, K 2 O and Fe 2 O 3 , could form deposits on the catalyst surface and obstruct the pores [112] . Generally, a negative effect of high ash contents in the biomass on the DCFC performance and durability was observed [117–121] . Indeed, a high content of ash hinder the contact between the carbon particles and the anode, leading to the blockage of anode active sites.…”

Section: Direct Biomass (Lignocellulose Cellulose and Lignin) Fuel mentioning

confidence: 99%

Lignocellulose, Cellulose and Lignin as Renewable Alternative Fuels for Direct Biomass Fuel Cells

Antolini¹

2020

ChemSusChem

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Section: Direct Biomass (Lignocellulose Cellulose and Lignin) Fuel mentioning

confidence: 99%

Lignocellulose, Cellulose and Lignin as Renewable Alternative Fuels for Direct Biomass Fuel Cells

Antolini¹

2020

ChemSusChem

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“…33,34 The r 2 can be controlled by tuning the current densities; however, the r 1 normally decreases due to carbon consumption and other reasons. [33][34][35][36][37][38][39][40][41][42][43][44] The reverse Boudouard reaction is an endothermic reaction with the free energy change expressed as ΔG (kJ mol −1 ) = 170 − 0.1745T, where T is temperature in°K . The CO formation is strongly favored at temperatures above 974.2 K. 6 From the viewpoints of thermodynamics and kinetics, elevated temperatures are the key factor that determines the rate of Boudouard reaction to reach equilibrium and the partial press of CO in the system.…”

Section: Introductionmentioning

confidence: 99%

“…The diffusion rates of CO and CO 2 , ie, r d 1 and r d 2 , respectively, have been proved to be much faster than the rates of R1 and R2; hence, the diffusion processes have almost no impeding effect on the cell performance . The r 2 can be controlled by tuning the current densities; however, the r 1 normally decreases due to carbon consumption and other reasons …”

Section: Introductionmentioning

confidence: 99%

A steel slag–derived Boudouard reaction catalyst for improved performance of direct carbon solid oxide fuel cells

et al. 2019

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Summary Solid oxide fuel cells (SOFCs) can directly utilize solid carbon as fuel by integrating with the reverse Boudouard reaction in the anode chamber. Efficiency of the Boudouard gasification of solid carbon fuel is one of the crucial factors influencing the performance of direct carbon SOFCs (DC‐SOFCs). In this paper, a novel Boudouard reaction catalyst derived from steel slag was first introduced into DC‐SOFCs for improving the electrochemical performance. The catalytic activity of the steel slag was activated using the molten alkali method to decompose the inert mineral phases of the raw material. The steel slag–derived catalyst was loaded on the activated charcoal by a wet ball milling method. This kind of catalyst can match up to the readily available solid carbon fuels in cost. Promoted by this highly active Boudouard reaction catalyst, the initial Boudouard gasification temperature of the carbon fuel decreased by 99°C, and the producing rate of carbon monoxide doubled. Furthermore, the power outputs of the fuel cells increased from 91 to 159 mW cm−2, and the fuel utilization increased from 17.10% to 46.43% at 825°C. This study demonstrates that the steel slag–derived catalyst is a promising material for the performance improvement of DC‐SOFCs and may make a valuable contribution to their commercial application.

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“…Recently, the feasibility of coal as fuel for DC‐SOFCs has attracted more and more attentions . The peak power density (PPD) of 89 mW cm −2 at 800°C was observed for the char of brown coal in DC‐SOFCs .…”

Section: Introductionmentioning

confidence: 99%

“…22 Recently, the feasibility of coal as fuel for DC-SOFCs has attracted more and more attentions. [23][24][25][26][27][28][29][30] The peak power density (PPD) of 89 mW cm −2 at 800°C was observed for the char of brown coal in DC-SOFCs. 24 An electrolyte supported SOFC using the lignite and lignite char as fuel reached the respective PPDs of 93 and 143 mW cm −2 both operating at 850°C.…”

Section: Introductionmentioning

confidence: 99%

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

Jiao

Xue

et al. 2018

Int J Energy Res

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Summary The use of low‐rank coal in a clean and efficient manner is a major challenge facing the current coal technology. A high‐sulfur coal with 4.5 wt% sulfur is chosen to examine the compatibility of the pristine coal and the purified contrast with a solid oxide fuel cell (SOFC) with nickel cermet anodes. Desulfurization of the pristine coal is performed by molten caustic leaching method with a removal ratio of 80%. Analyses of the physicochemical properties of coal samples indicate that the purified coal has a more favorable structure and higher Boudouard reactivity, which is suitable as a fuel for fuel cells. The assessment of electrochemical performance reveals that the purification treatment not only makes the peak power density of SOFCs improve from 115 to 221 mW cm−2 at 900°C but also extends their durability from 1.7 to 11.2 hours under a current density of 50 mA cm−2 at 850°C with a fuel availability increasing from 6.25% to 40%. The postmortem analyses show that far less deposited carbon and nickel sulfide are observed on the anode surface. The fuel‐based investigation reveals that the purified coal is a promising fuel for direct carbon fuel cells.

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The impact of physicochemical properties of coal on direct carbon solid oxide fuel cells

Cited by 16 publications

References 40 publications

Lignocellulose, Cellulose and Lignin as Renewable Alternative Fuels for Direct Biomass Fuel Cells

Lignocellulose, Cellulose and Lignin as Renewable Alternative Fuels for Direct Biomass Fuel Cells

A steel slag–derived Boudouard reaction catalyst for improved performance of direct carbon solid oxide fuel cells

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

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