An investigation of mineral distribution in coking and thermal coal chars as fuels for the direct carbon fuel cell

Allen, J. A.; Glenn, Michael; Hapugoda, Priyanthi; Stanger, Rohan; Donne, Scott W.

doi:10.1016/j.fuel.2017.12.084

Cited by 13 publications

(13 citation statements)

References 28 publications

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“…Figure shows the FTIR spectra which were collected from the solid materials after they were cooled down to ambient temperatures. Previous investigations from this lab have shown that the mineral content in this raw coal sample is 29.0 wt%, with quartz showing up as the most abundant mineral by far at 85.4 wt%, thus constituting 24.8 wt% of the coal char sample …”

Section: Resultsmentioning

confidence: 75%

“…Pyrolysis is therefore likely to still continue for this coal, pointing to a kinetically slow process in this instance because initial coal pyrolysis was performed at a slow heating rate of 5 °C min −1 and a residence time of 60 min at this temperature. Poor diffusion has been demonstrated to prevent complete devolatilization of coal samples during pyrolysis, which may have been a factor in the initial pyrolysis experiment carried out; however, mass loss overall is relatively small under N 2 ; i.e., ≈10 wt% of the initial mass measured even after holding at 800 °C for 2 h.…”

Section: Resultsmentioning

confidence: 99%

“…The coal char used in this study was sourced from a mine located in Victoria, Australia, and was ranked as bituminous, and it was pyrolyzed beforehand at 800 °C under N 2 . The coal sample was initially milled and sieved repeatedly to obtain a particle size of less than 45 μm.…”

Section: Methodsmentioning

confidence: 99%

“…The FTIR instrument was a Perkin Elmer Frontier Spectrum Two, which used an attenuated total reflectance (ATR) crystal as a sampling accessory, and the wavenumber range examined was 400–4000 cm −1 . Detailed results from mineral liberation analysis and coal grain analysis on this coal char were also provided in previous work where coal was designated as CT‐800 …”

Section: Methodsmentioning

confidence: 99%

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Carbon Gasification from a Molten Carbonate Eutectic

2019

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This investigation explores the impact of using a ternary alkali metal carbonate eutectic, i.e., Li2CO3, Na2CO3, and K2CO3 (43.5: 31.5: 25 mol%, respectively), as a catalyst for carbon gasification under CO2 and non‐CO2 atmospheres. Gasification under CO2, i.e., the reverse Boudouard reaction, is a well‐understood process with considerable commercial interest. However, in the context of direct carbon fuel cell (DCFC) operations, it is a parasitic reaction because it consumes fuel without producing power. In this study, the effect on carbon gasification of a common DCFC electrolyte is examined. Thermogravimetric analysis shows gasification occurring in the absence of a CO2 atmosphere, which has significant implications for DCFCs using alkali metal carbonates as the secondary electrolyte. A combined reaction mechanism is proposed which entails gasification from carbonate and carbonate decomposition.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Carbon Gasification from a Molten Carbonate Eutectic

2019

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“…The main reason is that, because of the high oxygen content of this type of coal, it is less chemically stable and therefore easier to break apart during the gasification reaction. Also, there is a small boost from the hydrogen that is already present in the coal (Allen, 2018 ).…”

Section: Gasification Of Coal and Other Hydrocarbonsmentioning

confidence: 99%

Prevalence of COVID -19 Pandemic: A Paradigm Shift to Hydrogen Economy

Muhibbudin¹

2020

Preprint

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Covid-19 pandemic lockdown has slow down the world economic system. The pandemic has cleared the roads, close factories and grounded planes causing severe economic challenges. The damaging impact of the pandemic amid lockdown has been a blessing in guise for the environment because of significant drop in pollution level as transport and industrial sectors shutdown. Transport and industrial sectors are major contributors to environmental degradation through various emissions as a result of fossil fuel consumption. Energy consumed by transport and industrial sectors will have to shift to viable, readily available, economically and environmentally friendly with no carbon build up post Covid-19 pandemic. Hydrogen energy remains the best alternative option technologies containing green house gas emission and pollutions of several forms. Hydrogen holds the potential to provide a clean, reliable, renewable and economical source of energy for meeting the growing and unending global energy needs post pandemic. The present paper explores the economic feasibility and potential of hydrogen to serve as a competitive fuel option post pandemic. In this paper, the role of hydrogen as an energy carrier hydrogen economy structure, potential of hydrogen economy, hydrogen production methods, hydrogen application and the economic and environmental importance of hydrogen as a viable fuel option post covid-19 pandemic were discussed. There will be a surge in demand and investment for hydrogen economy post Covid-19.

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