IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v74y2014icp464-470.html
   My bibliography  Save this article

Structural features and gasification reactivity of coal chars formed in Ar and CO2 atmospheres at elevated pressures

Author

Listed:
  • Bai, Yonghui
  • Wang, Yulong
  • Zhu, Shenghua
  • Li, Fan
  • Xie, Kechang

Abstract

The structural features and gasification reactivity of chars derived from pyrolysis of a bituminous coal under Ar (Ar char) and CO2 atmosphere (CO2 char) have been investigated, respectively. The pyrolysis was performed in a fixed bed reactor at a final temperature of 700 °C and pressures ranging from 0.1 to 1.5 MPa. It was found that CO2 affect the char yield, pore structure and surface area. The N2 surface area of the CO2 char at ambient pressure increased by nearly 42 times compared to the Ar char. The chemical structure features were characterized by using Raman spectroscopy. The recorded spectra between 800 and 1800 cm−1 were curve-fitted with 10 Gaussian bands representing typical structural features of chars to quantitatively compare the char structure difference. The ratio I(Gr+Vl+Vr)/ID between the band intensities of amorphous char structures with small aromatic ring (3–5 rings) systems and condensed aromatic ring systems (>6 rings) is seen to decrease with increasing pyrolysis pressure. The I(Gr+Vl+Vr)/ID of CO2 char is always lower than that of Ar char in the whole pressure range. The non-isothermal CO2 gasification from 700 to 1000 °C in a TGA (thermogravimetric analyzer) indicates that the char prepared under Ar atmosphere was more reactive.

Suggested Citation

  • Bai, Yonghui & Wang, Yulong & Zhu, Shenghua & Li, Fan & Xie, Kechang, 2014. "Structural features and gasification reactivity of coal chars formed in Ar and CO2 atmospheres at elevated pressures," Energy, Elsevier, vol. 74(C), pages 464-470.
    • Handle: RePEc:eee:energy:v:74:y:2014:i:c:p:464-470
    DOI: 10.1016/j.energy.2014.07.012
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544214008342
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2014.07.012?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Chen, Xiaohui & Zheng, Danxing & Guo, Jing & Liu, Jingxiao & Ji, Peijun, 2013. "Energy analysis for low-rank coal based process system to co-produce semicoke, syngas and light oil," Energy, Elsevier, vol. 52(C), pages 279-288.
    2. He, Chang & Feng, Xiao & Chu, Khim Hoong, 2013. "Process modeling and thermodynamic analysis of Lurgi fixed-bed coal gasifier in an SNG plant," Applied Energy, Elsevier, vol. 111(C), pages 742-757.
    3. Yi, Qun & Feng, Jie & Wu, Yanli & Li, Wenying, 2014. "3E (energy, environmental, and economy) evaluation and assessment to an innovative dual-gas polygeneration system," Energy, Elsevier, vol. 66(C), pages 285-294.
    4. Nzihou, Ange & Stanmore, Brian & Sharrock, Patrick, 2013. "A review of catalysts for the gasification of biomass char, with some reference to coal," Energy, Elsevier, vol. 58(C), pages 305-317.
    5. Gil, M.V. & Riaza, J. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Kinetic models for the oxy-fuel combustion of coal and coal/biomass blend chars obtained in N2 and CO2 atmospheres," Energy, Elsevier, vol. 48(1), pages 510-518.
    6. Gil, M.V. & Riaza, J. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Oxy-fuel combustion kinetics and morphology of coal chars obtained in N2 and CO2 atmospheres in an entrained flow reactor," Applied Energy, Elsevier, vol. 91(1), pages 67-74.
    7. Lai, ZhiYi & Ma, XiaoQian & Tang, YuTing & Lin, Hai, 2011. "A study on municipal solid waste (MSW) combustion in N2/O2 and CO2/O2 atmosphere from the perspective of TGA," Energy, Elsevier, vol. 36(2), pages 819-824.
    8. Yang, S.I. & Wu, M.S. & Wu, C.Y., 2014. "Application of biomass fast pyrolysis part I: Pyrolysis characteristics and products," Energy, Elsevier, vol. 66(C), pages 162-171.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Huang, Xiaohong & Hu, Fan & Liu, Xuhui & Liu, Zhaohui, 2022. "Structure and reactivity of chars prepared from low-volatile coal under O2/N2 and O2/CO2 conditions in a flat-flame assisted entrained flow reactor," Energy, Elsevier, vol. 261(PB).
    2. Xu, Jun & Liu, Jiawei & Ling, Peng & Zhang, Xin & Xu, Kai & He, Limo & Wang, Yi & Su, Sheng & Hu, Song & Xiang, Jun, 2020. "Raman spectroscopy of biochar from the pyrolysis of three typical Chinese biomasses: A novel method for rapidly evaluating the biochar property," Energy, Elsevier, vol. 202(C).
    3. Zhang, Zihang & Yi, Baojun & Sun, Zhengshuai & Zhang, Qi & Feng, He & Hu, Hongyun & Huang, Xiangguo & Zhao, Chunqing, 2021. "Reaction process and characteristics for coal char gasification under changed CO2/H2O atmosphere in various reaction stages," Energy, Elsevier, vol. 229(C).
    4. Zhang, Wenda & Sun, Shaozeng & Zhao, Yijun & Zhao, Zujie & Wang, Pengxiang & Feng, Dongdong & Li, Pengfei, 2020. "Effects of total pressure and CO2 partial pressure on the physicochemical properties and reactivity of pressurized coal char produced at rapid heating rate," Energy, Elsevier, vol. 208(C).
    5. Odeh, Andrew O., 2015. "Exploring the potential of petrographics in understanding coal pyrolysis," Energy, Elsevier, vol. 87(C), pages 555-565.
    6. Saiman Ding & Efthymios Kantarelis & Klas Engvall, 2020. "Effects of Porous Structure Development and Ash on the Steam Gasification Reactivity of Biochar Residues from a Commercial Gasifier at Different Temperatures," Energies, MDPI, vol. 13(19), pages 1-19, September.
    7. Guizani, Chamseddine & Jeguirim, Mejdi & Gadiou, Roger & Escudero Sanz, Fransisco Javier & Salvador, Sylvain, 2016. "Biomass char gasification by H2O, CO2 and their mixture: Evolution of chemical, textural and structural properties of the chars," Energy, Elsevier, vol. 112(C), pages 133-145.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Zhang, Yongliang & Jin, Bo & Zou, Xixian & Zhao, Haibo, 2016. "A clean coal utilization technology based on coal pyrolysis and chemical looping with oxygen uncoupling: Principle and experimental validation," Energy, Elsevier, vol. 98(C), pages 181-189.
    2. Xie, Candie & Liu, Jingyong & Zhang, Xiaochun & Xie, Wuming & Sun, Jian & Chang, Kenlin & Kuo, Jiahong & Xie, Wenhao & Liu, Chao & Sun, Shuiyu & Buyukada, Musa & Evrendilek, Fatih, 2018. "Co-combustion thermal conversion characteristics of textile dyeing sludge and pomelo peel using TGA and artificial neural networks," Applied Energy, Elsevier, vol. 212(C), pages 786-795.
    3. Yang, Qingchun & Zhang, Dawei & Zhou, Huairong & Zhang, Chenwei, 2018. "Process simulation, analysis and optimization of a coal to ethylene glycol process," Energy, Elsevier, vol. 155(C), pages 521-534.
    4. Yin, Chungen & Yan, Jinyue, 2016. "Oxy-fuel combustion of pulverized fuels: Combustion fundamentals and modeling," Applied Energy, Elsevier, vol. 162(C), pages 742-762.
    5. Gil, M.V. & Riaza, J. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Kinetic models for the oxy-fuel combustion of coal and coal/biomass blend chars obtained in N2 and CO2 atmospheres," Energy, Elsevier, vol. 48(1), pages 510-518.
    6. Mostafa, Mohamed E. & He, Limo & Xu, Jun & Hu, Song & Wang, Yi & Su, Sheng & Hu, Xun & Elsayed, Saad A. & Xiang, Jun, 2019. "Investigating the effect of integrated CO2 and H2O on the reactivity and kinetics of biomass pellets oxy-steam combustion using new double parallel volumetric model (DVM)," Energy, Elsevier, vol. 179(C), pages 343-357.
    7. Gil, María V. & Riaza, Juan & Álvarez, Lucía & Pevida, Covadonga & Rubiera, Fernando, 2015. "Biomass devolatilization at high temperature under N2 and CO2: Char morphology and reactivity," Energy, Elsevier, vol. 91(C), pages 655-662.
    8. López, R. & Fernández, C. & Fierro, J. & Cara, J. & Martínez, O. & Sánchez, M.E., 2014. "Oxy-combustion of corn, sunflower, rape and microalgae bioresidues and their blends from the perspective of thermogravimetric analysis," Energy, Elsevier, vol. 74(C), pages 845-854.
    9. Granados, David A. & Chejne, Farid & Mejía, Juan M. & Gómez, Carlos A. & Berrío, Ariel & Jurado, William J., 2014. "Effect of flue gas recirculation during oxy-fuel combustion in a rotary cement kiln," Energy, Elsevier, vol. 64(C), pages 615-625.
    10. Yang, S.I. & Hsu, T.C. & Wu, C.Y. & Chen, K.H. & Hsu, Y.L. & Li, Y.H., 2014. "Application of biomass fast pyrolysis part II: The effects that bio-pyrolysis oil has on the performance of diesel engines," Energy, Elsevier, vol. 66(C), pages 172-180.
    11. Dupont, Capucine & Jacob, Sylvain & Marrakchy, Khalil Ould & Hognon, Céline & Grateau, Maguelone & Labalette, Françoise & Da Silva Perez, Denilson, 2016. "How inorganic elements of biomass influence char steam gasification kinetics," Energy, Elsevier, vol. 109(C), pages 430-435.
    12. Po-Chih Kuo & Wei Wu, 2014. "Design, Optimization and Energetic Efficiency of Producing Hydrogen-Rich Gas from Biomass Steam Gasification," Energies, MDPI, vol. 8(1), pages 1-17, December.
    13. Álvarez, L. & Gharebaghi, M. & Jones, J.M. & Pourkashanian, M. & Williams, A. & Riaza, J. & Pevida, C. & Pis, J.J. & Rubiera, F., 2013. "CFD modeling of oxy-coal combustion: Prediction of burnout, volatile and NO precursors release," Applied Energy, Elsevier, vol. 104(C), pages 653-665.
    14. Jovanović, Marina & Vučićević, Biljana & Turanjanin, Valentina & Živković, Marija & Spasojević, Vuk, 2014. "Investigation of indoor and outdoor air quality of the classrooms at a school in Serbia," Energy, Elsevier, vol. 77(C), pages 42-48.
    15. Chen, Yuan & Lin, Weigang & Wu, Hao & Jensen, Peter Arendt & Song, Wenli & Du, Lin & Li, Songgeng, 2021. "Steam gasification of char derived from penicillin mycelial dreg and lignocellulosic biomass: Influence of P, K and Ca on char reactivity," Energy, Elsevier, vol. 228(C).
    16. Anna Trubetskaya, 2022. "Reactivity Effects of Inorganic Content in Biomass Gasification: A Review," Energies, MDPI, vol. 15(9), pages 1-36, April.
    17. Yi, Qun & Gong, Min-Hui & Huang, Yi & Feng, Jie & Hao, Yan-Hong & Zhang, Ji-Long & Li, Wen-Ying, 2016. "Process development of coke oven gas to methanol integrated with CO2 recycle for satisfactory techno-economic performance," Energy, Elsevier, vol. 112(C), pages 618-628.
    18. Yao, Xiwen & Liu, Qinghua & Kang, Zijian & An, Zhixing & Zhou, Haodong & Xu, Kaili, 2023. "Quantitative study on thermal conversion behaviours and gas emission properties of biomass in nitrogen and in CO2/N2 mixtures by TGA/DTG and a fixed-bed tube furnace," Energy, Elsevier, vol. 270(C).
    19. Li, Sheng & Jin, Hongguang & Gao, Lin & Zhang, Xiaosong, 2014. "Exergy analysis and the energy saving mechanism for coal to synthetic/substitute natural gas and power cogeneration system without and with CO2 capture," Applied Energy, Elsevier, vol. 130(C), pages 552-561.
    20. Mortari, Daniela A. & Pereira, Fernando M. & Crnkovic, Paula M., 2020. "Experimental investigation of the carbon dioxide effect on the devolatilization and combustion of a coal and sugarcane bagasse," Energy, Elsevier, vol. 204(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:74:y:2014:i:c:p:464-470. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.