Integration of coal pyrolysis process with iron ore reduction： Reduction behaviors of iron ore with benzene-containing coal pyrolysis gas as a reducing agent
An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed reactor using simulated coal pyrolysis gas with benzene as a model tar com- pound. Variables such as reduction temperature, reduction time and b...
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| Published in | Chinese journal of chemical engineering Vol. 24; no. 6; pp. 811 - 817 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
01.06.2016
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| Abstract | An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed reactor using simulated coal pyrolysis gas with benzene as a model tar com- pound. Variables such as reduction temperature, reduction time and benzene concentration are studied. The car- bon deposition of benzene results in the retarded iron reduction at low temperatures. At high temperatures over 800 ~C, the presence of benzene in the gas can promote iron reduction. The metallization can reach up to 99% in 20 min at 900 ~C in the presence of benzene. Significant increases of hydrogen and CO/CO2 ratio are observed in the gas. It is indicated that iron reduction is accompanied by the reforming and decomposition of benzene. The degree of metallization and reduction increases with the increasing benzene concentration. Iron oxide can nearly completely be converted into cementite with benzene present in the gas under the experimental conditions. No sintering is found in the reduced sample with benzene in the gas. |
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| AbstractList | An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed reactor using simulated coal pyrolysis gas with benzene as a model tar compound. Variables such as reduction temperature, reduction time and benzene concentration are studied. The carbon deposition of benzene results in the retarded iron reduction at low temperatures. At high temperatures over 800°C, the presence of benzene in the gas can promote iron reduction. The metallization can reach up to 99% in 20min at 900°C in the presence of benzene. Significant increases of hydrogen and CO/CO2 ratio are observed in the gas. It is indicated that iron reduction is accompanied by the reforming and decomposition of benzene. The degree of metallization and reduction increases with the increasing benzene concentration. Iron oxide can nearly completely be converted into cementite with benzene present in the gas under the experimental conditions. No sintering is found in the reduced sample with benzene in the gas.
An integrated coal pyrolysis process with iron reduction was proposed. Opposite effects on iron reduction were observed at low and high temperatures due to the presence of a large amount of coal tar in coal pyrolysis gas. Iron oxide can nearly completely be reduced to cementite with coal tar present in the gas. The content of coal tar in the pyrolysis gas has a significant effect on iron reduction. [Display omitted] An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed reactor using simulated coal pyrolysis gas with benzene as a model tar com- pound. Variables such as reduction temperature, reduction time and benzene concentration are studied. The car- bon deposition of benzene results in the retarded iron reduction at low temperatures. At high temperatures over 800 ~C, the presence of benzene in the gas can promote iron reduction. The metallization can reach up to 99% in 20 min at 900 ~C in the presence of benzene. Significant increases of hydrogen and CO/CO2 ratio are observed in the gas. It is indicated that iron reduction is accompanied by the reforming and decomposition of benzene. The degree of metallization and reduction increases with the increasing benzene concentration. Iron oxide can nearly completely be converted into cementite with benzene present in the gas under the experimental conditions. No sintering is found in the reduced sample with benzene in the gas. |
| Author | Xin Li Helong Hui Songgeng Li Lu He Lijie Cui |
| AuthorAffiliation | State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering Chinese Academy of Sciences, Beijing 100190, China University of Chinese ,Academy of Sciences, Beijing 100049, China |
| Author_xml | – sequence: 1 givenname: Xin surname: Li fullname: Li, Xin organization: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China – sequence: 2 givenname: Helong surname: Hui fullname: Hui, Helong organization: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China – sequence: 3 givenname: Songgeng surname: Li fullname: Li, Songgeng email: sgli@ipe.ac.cn organization: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China – sequence: 4 givenname: Lu surname: He fullname: He, Lu organization: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China – sequence: 5 givenname: Lijie surname: Cui fullname: Cui, Lijie email: ljcui@ucas.ac.cn organization: University of Chinese Academy of Sciences, Beijing 100049, China |
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| CitedBy_id | crossref_primary_10_1016_S1872_5813_21_60065_8 crossref_primary_10_1016_j_jaap_2020_104808 crossref_primary_10_1016_j_fuel_2021_121834 crossref_primary_10_1016_j_joei_2019_05_011 crossref_primary_10_1016_j_sciaf_2021_e00909 crossref_primary_10_1016_j_cej_2022_139416 crossref_primary_10_1016_j_fuel_2017_12_005 crossref_primary_10_1016_j_powtec_2019_04_069 crossref_primary_10_1016_j_ijhydene_2022_03_119 crossref_primary_10_1021_acs_energyfuels_6b01182 crossref_primary_10_1016_j_fuel_2019_115711 crossref_primary_10_1016_j_fuproc_2018_01_006 |
| Cites_doi | 10.1016/j.fuel.2012.02.039 10.1021/ef300652f 10.1002/ceat.201300748 10.1002/ceat.201000202 10.1016/j.fuel.2006.10.024 10.1111/j.1151-2916.1989.tb05962.x 10.1021/ef500201m 10.1016/j.powtec.2014.01.004 10.1021/ef3013272 10.1016/j.fuproc.2013.03.012 10.1021/ef900720m 10.1016/j.fuel.2012.01.024 10.1021/ef9005109 10.1179/174328108X301732 10.2355/isijinternational.38.1053 10.1021/ef3014635 10.1016/S1005-9040(06)60056-1 10.1107/S0021889874010375 10.1016/0008-6223(86)90176-4 10.1016/j.apcatb.2010.02.026 10.1016/S0165-2370(99)00025-X 10.1016/j.fuel.2012.09.019 |
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| Notes | 11-3270/TQ Coal pyrolysisIron reductionIntegrationTar effect An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed reactor using simulated coal pyrolysis gas with benzene as a model tar com- pound. Variables such as reduction temperature, reduction time and benzene concentration are studied. The car- bon deposition of benzene results in the retarded iron reduction at low temperatures. At high temperatures over 800 ~C, the presence of benzene in the gas can promote iron reduction. The metallization can reach up to 99% in 20 min at 900 ~C in the presence of benzene. Significant increases of hydrogen and CO/CO2 ratio are observed in the gas. It is indicated that iron reduction is accompanied by the reforming and decomposition of benzene. The degree of metallization and reduction increases with the increasing benzene concentration. Iron oxide can nearly completely be converted into cementite with benzene present in the gas under the experimental conditions. No sintering is found in the reduced sample with benzene in the gas. |
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| Snippet | An integrated coal pyrolysis process with iron ore reduction is proposed in this article. As the first step, iron oxide reduction is studied in a fixed bed... |
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| SubjectTerms | Coal pyrolysis Integration Iron reduction Tar effect 一体化 固定床反应器 热解气体 煤热解过程 苯 还原剂 还原行为 铁矿石还原 |
| Title | Integration of coal pyrolysis process with iron ore reduction： Reduction behaviors of iron ore with benzene-containing coal pyrolysis gas as a reducing agent |
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