IDEAS home Printed from https://ideas.repec.org/a/eee/appene/v206y2017icp1241-1249.html
   My bibliography  Save this article

The key for sodium-rich coal utilization in entrained flow gasifier: The role of sodium on slag viscosity-temperature behavior at high temperatures

Author

Listed:
  • Chen, Xiaodong
  • Kong, Lingxue
  • Bai, Jin
  • Dai, Xin
  • Li, Huaizhu
  • Bai, Zongqing
  • Li, Wen

Abstract

Tremendous sodium-rich coal in China has unique ash compositions, and the entrained flow gasification is one of the best choices to use sodium-rich coal for coal chemical industry. The entrained flow gasifiers require smooth slag tapping for long term and safe running, but the viscosity-temperature behavior of high-sodium slags is unknown, which limits the utilization of sodium-rich coal. In this study, viscosity-temperature behavior of high-sodium coal ash slags was revealed for the first time, and the parameter of slag network structure and index of slag crystallization tendency is raised for slag viscosity evaluation. The results show that Na2O provides O2− ions which break SiOSi bonds and slag network structure. However, Al3+ ions are absorbed into silicate network, acting as a network former with the ionic charge-compensation effect of Na+. The classic structural parameter (fraction of non-bridging oxygen, NBO) is modified to evaluate the high-sodium slag viscosity accurately by taking Al3+ into account. NBO fraction decreases as Na2O content increases, leading to the decrease of slag viscosity. Below Tliq, slags are prone to be crystalline slag with increasing Na2O content or glassy slag with increase in SiO2/Al2O3 ratio (S/A). A novel index, namely glassy slag formation ability (G), is established to quantitatively evaluate the crystallization tendency of coal ash slags. G is the ratio of activation energy for viscous flow (Eη) to Tliq. The slag will exhibit the glassy behavior when G is higher than 0.16kJ/(mol·K). The results enhance the knowledge of viscosity-temperature behavior of high-sodium coal ash slags and will be helpful for coal selection and blending to avoid slag blockage in entrained flow gasification.

Suggested Citation

  • Chen, Xiaodong & Kong, Lingxue & Bai, Jin & Dai, Xin & Li, Huaizhu & Bai, Zongqing & Li, Wen, 2017. "The key for sodium-rich coal utilization in entrained flow gasifier: The role of sodium on slag viscosity-temperature behavior at high temperatures," Applied Energy, Elsevier, vol. 206(C), pages 1241-1249.
    • Handle: RePEc:eee:appene:v:206:y:2017:i:c:p:1241-1249
    DOI: 10.1016/j.apenergy.2017.10.020
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0306261917314368
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.apenergy.2017.10.020?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. Tremel, Alexander & Haselsteiner, Thomas & Kunze, Christian & Spliethoff, Hartmut, 2012. "Experimental investigation of high temperature and high pressure coal gasification," Applied Energy, Elsevier, vol. 92(C), pages 279-285.
    2. Xiao, Ruirui & Chen, Xueli & Wang, Fuchen & Yu, Guangsuo, 2010. "Pyrolysis pretreatment of biomass for entrained-flow gasification," Applied Energy, Elsevier, vol. 87(1), pages 149-155, January.
    3. Xu, Shisen & Ren, Yongqiang & Wang, Baomin & Xu, Yue & Chen, Liang & Wang, Xiaolong & Xiao, Tiancun, 2014. "Development of a novel 2-stage entrained flow coal dry powder gasifier," Applied Energy, Elsevier, vol. 113(C), pages 318-323.
    4. Li, Fenghai & Li, Zhenzhu & Huang, Jiejie & Fang, Yitian, 2014. "Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics," Applied Energy, Elsevier, vol. 131(C), pages 279-287.
    5. Ding, Lu & Gong, Yan & Wang, Yifei & Wang, Fuchen & Yu, Guangsuo, 2017. "Characterisation of the morphological changes and interactions in char, slag and ash during CO2 gasification of rice straw and lignite," Applied Energy, Elsevier, vol. 195(C), pages 713-724.
    6. Chen, Chih-Jung & Hung, Chen-I. & Chen, Wei-Hsin, 2012. "Numerical investigation on performance of coal gasification under various injection patterns in an entrained flow gasifier," Applied Energy, Elsevier, vol. 100(C), pages 218-228.
    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. Xiongchao Lin & Wenshuai Xi & Jinze Dai & Caihong Wang & Yonggang Wang, 2020. "Prediction of Slag Characteristics Based on Artificial Neural Network for Molten Gasification of Hazardous Wastes," Energies, MDPI, vol. 13(19), pages 1-18, October.
    2. Liu, Yingzu & He, Yong & Wang, Zhihua & Xia, Jun & Wan, Kaidi & Whiddon, Ronald & Cen, Kefa, 2018. "Characteristics of alkali species release from a burning coal/biomass blend," Applied Energy, Elsevier, vol. 215(C), pages 523-531.
    3. Yang, Wei & Zhu, Youjian & Cheng, Wei & Sang, Huiying & Xu, Hanshen & Yang, Haiping & Chen, Hanping, 2018. "Effect of minerals and binders on particulate matter emission from biomass pellets combustion," Applied Energy, Elsevier, vol. 215(C), pages 106-115.
    4. Wang, Kangcheng & Zhang, Jie & Shang, Chao & Huang, Dexian, 2021. "Operation optimization of Shell coal gasification process based on convolutional neural network models," Applied Energy, Elsevier, vol. 292(C).
    5. Wu, Guixuan & Seebold, Sören & Yazhenskikh, Elena & Tanner, Joanne & Hack, Klaus & Müller, Michael, 2019. "Slag mobility in entrained flow gasifiers optimized using a new reliable viscosity model of iron oxide-containing multicomponent melts," Applied Energy, Elsevier, vol. 236(C), pages 837-849.

    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. Li, Tian & Niu, Yanqing & Wang, Liang & Shaddix, Christopher & Løvås, Terese, 2018. "High temperature gasification of high heating-rate chars using a flat-flame reactor," Applied Energy, Elsevier, vol. 227(C), pages 100-107.
    2. Li, Fenghai & Li, Zhenzhu & Huang, Jiejie & Fang, Yitian, 2014. "Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics," Applied Energy, Elsevier, vol. 131(C), pages 279-287.
    3. Li, Fenghai & Li, Yang & Fan, Hongli & Wang, Tao & Guo, Mingxi & Fang, Yitian, 2019. "Investigation on fusion characteristics of deposition from biomass vibrating grate furnace combustion and its modification," Energy, Elsevier, vol. 174(C), pages 724-734.
    4. Jeong, Hyo Jae & Seo, Dong Kyun & Hwang, Jungho, 2014. "CFD modeling for coal size effect on coal gasification in a two-stage commercial entrained-bed gasifier with an improved char gasification model," Applied Energy, Elsevier, vol. 123(C), pages 29-36.
    5. Cui, Tongmin & Fan, Wenke & Dai, Zhenghua & Guo, Qinghua & Yu, Guangsuo & Wang, Fuchen, 2016. "Variation of the coal chemical structure and determination of the char molecular size at the early stage of rapid pyrolysis," Applied Energy, Elsevier, vol. 179(C), pages 650-659.
    6. Lu, Yue & Li, Zhengqi & Jiang, Guangfei & Huang, Chunchao & Chen, Zhichao, 2024. "Study on mixing performance of atmospheric entrained flow gasification burner using fine ash as feedstock," Energy, Elsevier, vol. 292(C).
    7. Li, Guangyu & Xu, Shisen & Zhao, Xuebin & Sun, Ruijin & Wang, Chang’an & Liu, Kang & Mao, Qisen & Che, Defu, 2020. "Investigation of chemical composition and morphology of ash deposition in syngas cooler of an industrialized two-stage entrained-flow coal gasifier," Energy, Elsevier, vol. 194(C).
    8. Fang, Neng & Li, Zhengqi & Liu, Shuxuan & Xie, Cheng & Zeng, Lingyan & Chen, Zhichao, 2021. "Experimental air/particle flow characteristics of an 80,000 Nm3/h fly ash entrained-flow gasifier with different multi-burner arrangements," Energy, Elsevier, vol. 215(PB).
    9. Sunel Kumar & Zhihua Wang & Yong He & Yanqun Zhu & Kefa Cen, 2022. "Numerical Analysis for Coal Gasification Performance in a Lab-Scale Gasifier: Effects of the Wall Temperature and Oxygen/Coal Ratio," Energies, MDPI, vol. 15(22), pages 1-15, November.
    10. Xu, Shisen & Ren, Yongqiang & Wang, Baomin & Xu, Yue & Chen, Liang & Wang, Xiaolong & Xiao, Tiancun, 2014. "Development of a novel 2-stage entrained flow coal dry powder gasifier," Applied Energy, Elsevier, vol. 113(C), pages 318-323.
    11. Li, Fenghai & Zhao, Chaoyue & Guo, Qianqian & Li, Yang & Fan, Hongli & Guo, Mingxi & Wu, Lishun & Huang, Jiejie & Fang, Yitian, 2020. "Exploration in ash-deposition (AD) behavior modification of low-rank coal by manure addition," Energy, Elsevier, vol. 208(C).
    12. Li, Fenghai & Liu, Quanrun & Li, Meng & Fang, Yitian, 2018. "Understanding fly-ash formation during fluidized-bed gasification of high-silicon-aluminum coal based on its characteristics," Energy, Elsevier, vol. 150(C), pages 142-152.
    13. Wang, Qian & Han, Kuihua & Wang, Peifu & Li, Shijie & Zhang, Mingyang, 2020. "Influence of additive on ash and combustion characteristics during biomass combustion under O2/CO2 atmosphere," Energy, Elsevier, vol. 195(C).
    14. Chen, Wei-Hsin & Chen, Chih-Jung & Hung, Chen-I & Shen, Cheng-Hsien & Hsu, Heng-Wen, 2013. "A comparison of gasification phenomena among raw biomass, torrefied biomass and coal in an entrained-flow reactor," Applied Energy, Elsevier, vol. 112(C), pages 421-430.
    15. Theppitak, Sarut & Hungwe, Douglas & Ding, Lu & Xin, Dai & Yu, Guangsuo & Yoshikawa, Kunio, 2020. "Comparison on solid biofuel production from wet and dry carbonization processes of food wastes," Applied Energy, Elsevier, vol. 272(C).
    16. Sakiewicz, Piotr & Piotrowski, Krzysztof & Kalisz, Sylwester, 2020. "Neural network prediction of parameters of biomass ashes, reused within the circular economy frame," Renewable Energy, Elsevier, vol. 162(C), pages 743-753.
    17. Ruiz, J.A. & Juárez, M.C. & Morales, M.P. & Muñoz, P. & Mendívil, M.A., 2013. "Biomass gasification for electricity generation: Review of current technology barriers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 18(C), pages 174-183.
    18. Hua-Min Liu & Ming-Fei Li & Sheng Yang & Run-Cang Sun, 2013. "Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues," Energies, MDPI, vol. 6(3), pages 1-14, March.
    19. Panwar, N.L. & Kothari, Richa & Tyagi, V.V., 2012. "Thermo chemical conversion of biomass – Eco friendly energy routes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(4), pages 1801-1816.
    20. Zeng, Guang & Zhou, Anqi & Fu, Jinming & Ji, Yang, 2022. "Experimental and numerical investigations on NOx formation and reduction mechanisms of pulverized-coal stereo-staged combustion," Energy, Elsevier, vol. 261(PB).

    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:appene:v:206:y:2017:i:c:p:1241-1249. 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.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description .

    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.