Integrated coal-pyrolysis tar reforming using steelmaking slag for carbon composite and hydrogen production

Cahyono, Rochim Bakti; Rozhan, Alya Naili; Yasuda, Naoto; Nomura, Takahiro; Hosokai, Sou; Kashiwaya, Yoshiaki; Akiyama, Tomohiro

doi:10.1016/j.fuel.2013.03.070

Cited by 41 publications

(30 citation statements)

References 16 publications

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“…The tar carbon was deposited in the iron ore in pores of size less than 4 nm [11]. These results clearly show that differences among the carbon contents were caused by the number of micropores after the dehydration process.…”

Section: Effect Of Amount Of Cw In Iron Orementioning

confidence: 69%

“…The integrated coal pyrolysis-tar decomposition experiments were carried out using apparatus similar to that described elsewhere by Cahyono et al [11] and Rozhan et al [10]. The experimental procedure was modified slightly to adapt the temperature control.…”

Section: Tar Decomposition and Carbon Depositionmentioning

confidence: 99%

“…Nanoscale contact of iron ore and carbon enhances the contact area and promotes high reactivity. This system can also be used to upgrade steelmaking slag as a supplementary fuel in sintering and blast furnace operations [10,11]. Based on the facts above, integrated coal pyrolysis-tar decomposition over low-grade iron ore is a promising candidate for resolving not only problems related to reducing agents, but also tar-related problems.…”

Section: Introductionmentioning

confidence: 99%

“…The large amount of raw material from the pyrolysis enhances tar conversion in the decomposition process to produce deposited carbon and gases [13]. In contrast, a high-activity tar component at elevated temperatures promotes gas production rather than carbon deposition within a porous ore [14].…”

Section: Introductionmentioning

confidence: 99%

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Optimum temperatures for carbon deposition during integrated coal pyrolysis–tar decomposition over low-grade iron ore for ironmaking applications

Cahyono

Yasuda

Nomura

et al. 2014

Fuel Processing Technology

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Carbon deposited within low-grade iron ore, which was produced using an integrated process of coal pyrolysis and tar decomposition, showed high reactivity as a reducing agent. Coal pyrolysis and tar decomposition were both highly sensitive to temperature and exhibited contrasting behaviours during carbon deposition. In these experiments, the optimum temperatures for pyrolysis and tar decomposition were determined to obtain maximum carbon deposition within porous iron ore. High-temperature pyrolysis generated large amounts of volatile matter (tar and gases), which caused high tar decomposition and produced large amounts of deposited carbon and gases. The deposited carbon was the major product of tar decomposition at lower temperatures (400-600 °C), whereas mainly gases were produced at higher temperatures (700-800 °C), because of gasification of carbon. However, sintering started at 800 °C, and it significantly diminished the BET surface area and pore size distribution. The highest amount of deposited carbon was obtained at a pyrolysis temperature of 800 °C and a tar decomposition temperature of 600 °C. Hamersley ore gave higher amounts of deposited carbon than Robe-river ore because of its large pore size less than 4 nm, which was suitable for carbon deposition. The pore size distribution was a more important factor than the surface area in the carbon deposition process. Based on these results, the proposed system could achieve maximum carbon deposition in porous iron ore and solve problems related to reducing agents, tar materials, and the use of expensive raw materials in the ironmaking industry.

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Section: Effect Of Amount Of Cw In Iron Orementioning

confidence: 69%

Section: Tar Decomposition and Carbon Depositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimum temperatures for carbon deposition during integrated coal pyrolysis–tar decomposition over low-grade iron ore for ironmaking applications

Cahyono

Yasuda

Nomura

et al. 2014

Fuel Processing Technology

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“…Iron-based catalyst is one of the candidates which are cheaper than nickel-based catalysts and non-toxic. It has also been reported that iron-oxidebased catalysts such as Fe2O3-Al2O3 could be used effectively for tar decomposition to produce hydrogen [12,13]. The inactive iron ore catalyst could be excellent raw material in the ironmaking industry which contributes to address the problems about raw material, energy and environment.…”

Section: Introductionmentioning

confidence: 99%

Tar decomposition over porous low-grade iron ore

Cahyono

Hidayat

Akiyama

2018

AIP Conference Proceedings

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Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Shen

et al. 2017

Int J Energy Res

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Summary The study aims to analyze catalytic tar destruction, evaluate the activity of the Ni‐based catalyst supported by waste iron slag, and obtain clean pyrolysis syngas. The effects of different nickel loadings, catalytic temperatures, and catalyst calcination temperatures on volatile were investigated in order to determine the optimal process condition. The analysis results showed that the iron slag Ni‐based catalyst had a relatively low specific surface area. However, it showed an excellent resistance performance to the coke deposition and displayed the high tar removal ability. Moreover, the tar conversion and the yield of syngas were significantly affected by nickel loadings. When the nickel loading reached 3%, the tar dew point was decreased by nearly 100 °C and the tar conversion reached 94.84%. The favorable reaction temperature was about 800 °C based on the consideration of energy consumption and the catalytic performance. Calcination temperature affected tar yield and syngas yield. The application of iron slag in nickel catalyst realized the reutilization of waste materials, indicating significant practical values. Copyright © 2017 John Wiley & Sons, Ltd.

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Integrated coal-pyrolysis tar reforming using steelmaking slag for carbon composite and hydrogen production

Cited by 41 publications

References 16 publications

Optimum temperatures for carbon deposition during integrated coal pyrolysis–tar decomposition over low-grade iron ore for ironmaking applications

Optimum temperatures for carbon deposition during integrated coal pyrolysis–tar decomposition over low-grade iron ore for ironmaking applications

Tar decomposition over porous low-grade iron ore

Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

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