Hydrogen production from steam reforming of coke oven gas and its utility for indirect reduction of iron oxides in blast furnace

Chen, Wei‐Hsin; Lin, Mu; Yu, Aibing; Du, Shan Wen; Leu, Tzong Shyng

doi:10.1016/j.ijhydene.2012.05.021

Cited by 71 publications

(18 citation statements)

References 41 publications

(31 reference statements)

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“…Accordingly, the CH 4 -to-hematite molar ratio (M/H ratio), ranging from 0.5 to 4, was employed as one important factor in evaluating the IR of iron oxides. The IR of iron oxides is mainly triggered at temperatures of 400e900 C [11], and the IR of iron oxides and carbon formation are highly related to the supplied oxygen. Therefore, the reaction temperature and oxygen-to-fuel molar ratio (O/F ratio) in the ranges of 400e900 C and 1e4, respectively, were taken into account.…”

Section: Coke Oven Gas and Iron Oxidesmentioning

confidence: 99%

“…While coals are processed in coke ovens in the absence of oxygen to produce metallurgical cokes [9], COG, also called coke gas, is produced in the coke-making process when volatile coal matter is converted into COG, leaving carbon intensive coke behind [10]. The typical contents of H 2 , CH 4 , and CO in COG are in the ranges of 54e63, 23e32, and 3.6e7.6 vol%, respectively [11], revealing that COG is a naturally H 2 -rich gas mixture. Due to the amount of CH 4 contained in COG, the H 2 in the gas mixture can be further enriched if CH 4 is reformed.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the amount of CH 4 contained in COG, the H 2 in the gas mixture can be further enriched if CH 4 is reformed. The product gas can then be thought of as a promising source of H 2 , and can be used in fuel cells or for indirect reduction of iron oxides in BFs [2,11].…”

Section: Introductionmentioning

confidence: 99%

“…A variety of approaches have been used to figure out the detailed mechanisms of iron oxide reduction in BFs, such as experimental studies [21e24], mathematical models [25], kinetics development [26e28], and thermodynamic analysis [11,29], and the key works regarding this are listed in Table 2. The table indicates that IR is closely related to CO and H 2 .…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Chen

Hsu

2015

Energy

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Section: Coke Oven Gas and Iron Oxidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Chen

Hsu

2015

Energy

Self Cite

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“…Shanxi, a large coal and coke producing province in China, has a large amount of surplus coke oven gases (COGs) [1][2][3][4][5][6], which contain substantial amounts of H 2 , CH 4 , and CO. In 2014, the coke output of Shanxi was 87.22 million tons, which accounted for 18.29% of the national output.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Reduction of Hematite Ore Fines to Magnetite Ore Fines at Low Temperatures

Yang

Pan

et al. 2017

Journal of Chemistry

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Surplus coke oven gases (COGs) and low grade hematite ores are abundant in Shanxi, China. Our group proposes a new process that could simultaneously enrich CH4from COG and produce separated magnetite from low grade hematite. In this work, low-temperature hydrogen reduction of hematite ore fines was performed in a fixed-bed reactor with a stirring apparatus, and a laboratory Davis magnetic tube was used for the magnetic separation of the resulting magnetite ore fines. The properties of the raw hematite ore, reduced products, and magnetic concentrate were analyzed and characterized by a chemical analysis method, X-ray diffraction, optical microscopy, and scanning electron microscopy. The experimental results indicated that, at temperatures lower than 400°C, the rate of reduction of the hematite ore fines was controlled by the interfacial reaction on the core surface. However, at temperatures higher than 450°C, the reaction was controlled by product layer diffusion. With increasing reduction temperature, the average utilization of hydrogen initially increased and tended to a constant value thereafter. The conversion of Fe2O3in the hematite ore played an important role in the total iron recovery and grade of the concentrate. The grade of the concentrate decreased, whereas the total iron recovery increased with the increasing Fe2O3conversion.

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Analysis of Two‐Step Solar Thermochemical Looping Reforming of Fe₃O₄ Redox Cycles for Synthesis Gas Production

et al. 2019

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A two‐step solar thermochemical looping reforming (STCLR) of CH4—Fe3O4 redox cycles via H2O and CO2 splitting is investigated for H2 and CO production. The P1 approximation is adopted for the radiation heat transfer and high‐temperature thermal characteristics of active materials in the reaction medium. A benchmark experimental setup for the conversion of solar energy to syngas based on the solar thermochemical technology is presented. The effects of operating conditions on the yield of H2 and CO as well as syngas production are investigated at both thermal reduction and oxidation steps. It is found that the key performance of two‐step CH4—Fe3O4 redox cycles for a higher H2 and CO production depends on the efficiency of methane and oxidizer (H2O and CO2) conversion. Furthermore, a substantial amount of H2 and CO production with carbon deposition is obtained when the thermal reduction is extended to the mixed oxide solid solution (FeO—Fe). Among the oxygen carriers, FeO exhibits a higher oxygen exchange for H2 production. However, the synergetic effect of FeO—Fe reactivity strongly contributes to syngas yield. The present solar reactor model can significantly contribute to the reduction of greenhouse gas emission by utilizing 40% of CO2 emissions into solar fuels such as H2 and syngas. The results indicate that highly selective syngas with an H2/CO ratio close to 2 can be obtained with a strong control of γ = H2O/CO2.

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Hydrogen production from steam reforming of coke oven gas and its utility for indirect reduction of iron oxides in blast furnace

Cited by 71 publications

References 41 publications

Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Hydrogen Reduction of Hematite Ore Fines to Magnetite Ore Fines at Low Temperatures

Analysis of Two‐Step Solar Thermochemical Looping Reforming of Fe₃O₄ Redox Cycles for Synthesis Gas Production

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Hydrogen production from steam reforming of coke oven gas and its utility for indirect reduction of iron oxides in blast furnace

Cited by 71 publications

References 41 publications

Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace

Hydrogen Reduction of Hematite Ore Fines to Magnetite Ore Fines at Low Temperatures

Analysis of Two‐Step Solar Thermochemical Looping Reforming of Fe3O4 Redox Cycles for Synthesis Gas Production

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Analysis of Two‐Step Solar Thermochemical Looping Reforming of Fe₃O₄ Redox Cycles for Synthesis Gas Production