A comparative investigation on direct carbon solid oxide fuel cells operated with fuels of biochar derived from wheat straw, corncob, and bagasse

Qiu, Qianyuan; Zhou, Mingyang; Cai, Weizi; Zhou, Qian; Zhang, Yapeng; Wang, Wei; Liu, Meilin; Liu, Jiang

doi:10.1016/j.biombioe.2018.12.016

Cited by 72 publications

(27 citation statements)

References 39 publications

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“…Apparently, the single cell gives a high initial voltage of 0.65 V and a relatively stable discharging platform from beginning to end. The discharging time lasts for 21 h, corresponding to a released electric quantity of 7560 C. Considering the overall reaction as a four‐electron reaction (C + 2O 2− = CO 2 + 4e), the pepper straw char consumed in the system is 0.24 g. Accordingly, the fuel utilization of the microtubular DC‐SOFC is 44.4% calculated from Faraday's law with 0.54 g char as feedstock, which is obviously higher than that with other biomass fuels . The result has once again proven that the pepper straw containing natural catalysts is an ideal fuel for the DC‐SOFCs.…”

Section: Resultsmentioning

confidence: 92%

“…Carbon fuels were prepared according to the following procedures that are similar to the previous work . One‐year‐old pepper straws were collected as agriculture byproduct from local farmland in Linyi city, Shandong province of China (35°5′ N, 118°35′ E).…”

Section: Methodsmentioning

confidence: 99%

“…However, there are still several barriers remaining to be overcome for the performance improvement and widespread application of DC‐SOFCs. Currently, many types of biomass derived from crop residues, such as corn cob char, leaf char, wheat straw, bagasse, pomelo peel char, and walnut shells, have been adopted as carbon fuels to improve the cell performance due to the naturally existing catalysts of the reverse Boudouard reaction. Cai et al developed an electrolyte‐supported solid oxide fuel cell (SOFC), which yielded a maximum power density of 197 mW cm −2 at 800 °C using wheat straw as fuel.…”

Section: Introductionmentioning

confidence: 99%

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A Microtubular Direct Carbon Solid Oxide Fuel Cell Operated on the Biochar Derived from Pepper Straw

Wang

Xie

et al. 2019

Energy Tech

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Direct carbon solid oxide fuel cell (DC‐SOFC) is a promising energy conversion system, which can directly convert the chemical energy of biomass into electrical energy with high efficiency and low pollution. Herein, a microtubular DC‐SOFC fueled with the biochar derived from pepper straw for electrical power generation is reported. The DC‐SOFC operated on pepper straw char gives a maximum power density of 217 mW cm−2, comparable with 252 mW cm−2 for that with hydrogen fuel at 850 °C. Moreover, the lifetime of the DC‐SOFC reaches 21 h at a discharge current of 100 mA with the fuel utilization of 44.4%. The pepper straw char is characterized physically by scanning electron microscopy, energy‐dispersive spectrometer, X‐ray diffraction, Raman spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The results demonstrate that the pepper straw char contains natural catalysts in itself and their contribution on the electrochemical performance of the microtubular DC‐SOFC is analyzed in detail.

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Section: Resultsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Microtubular Direct Carbon Solid Oxide Fuel Cell Operated on the Biochar Derived from Pepper Straw

Wang

Xie

et al. 2019

Energy Tech

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“…On the other hand, the contents of SiO 2 and Al 2 O 3 may have negative effects on the catalytic activity of K3 . This may be one of the major reasons leading to K3 possessing lower catalytic activity than R. As seen in Figure B, the higher CO‐producing rate of the C/R mixture than that of the C/K3 mixture indicates that R had higher catalytic activity than K3.…”

Section: Resultsmentioning

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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“…Xu et al [256] definitively established the direct relation between the thermal degradation of biomasses and their performances in carbon fuels cell by comparing thermogravimetric analysis with empirical data. Qiu et al [257] reported the development of a direct carbon solid oxide fuel cell that was able to convert the chemical energy of biochar into electricity with high efficiency. The authors used biochar that had been derived from several biomasses (wheat straw, corncob, and bagasse), reaching a peak power densities of 260 mW/cm 2 at 800 • C. A detailed study of direct carbon fuel cells was reported by Kacprzak et al [258][259][260].…”

Section: Biochar Used For Fuel Cell Productionmentioning

confidence: 99%

A Review of Non-Soil Biochar Applications

et al. 2020

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Biochar is the solid residue that is recovered after the thermal cracking of biomasses in an oxygen-free atmosphere. Biochar has been used for many years as a soil amendment and in general soil applications. Nonetheless, biochar is far more than a mere soil amendment. In this review, we report all the non-soil applications of biochar including environmental remediation, energy storage, composites, and catalyst production. We provide a general overview of the recent uses of biochar in material science, thus presenting this cheap and waste-derived material as a high value-added and carbonaceous source.

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A comparative investigation on direct carbon solid oxide fuel cells operated with fuels of biochar derived from wheat straw, corncob, and bagasse

Cited by 72 publications

References 39 publications

A Microtubular Direct Carbon Solid Oxide Fuel Cell Operated on the Biochar Derived from Pepper Straw

A Microtubular Direct Carbon Solid Oxide Fuel Cell Operated on the Biochar Derived from Pepper Straw

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

A Review of Non-Soil Biochar Applications

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