Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Effects of Alkali and Alkaline Earth Metallic Species and Chemical Structure on Nascent Char-O2Reactivity

    Access Status
    Fulltext not available
    Authors
    Zhang, Lei
    Li, T.
    Wang, Shuai
    Dong, Li
    Li, C.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zhang, L. and Li, T. and Wang, S. and Dong, L. and Li, C. 2017. Effects of Alkali and Alkaline Earth Metallic Species and Chemical Structure on Nascent Char-O2Reactivity. Energy and Fuels. 31 (12): pp. 13578-13584.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.7b03022
    ISSN
    0887-0624
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/62152
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 American Chemical Society. Factors influencing the nascent char-O 2 reactivity was investigated in this study from the aspects of alkali and alkaline earth metallic species and char chemical structure. Char samples were prepared from the fast pyrolysis of two low-rank coals (Loy Yang brown coal and Collie sub-bituminous coal) in a wire-mesh reactor at temperature ranging from 600 to 1200 °C with holding time up to 5 s. The concentrations of alkali and alkaline earth metallic species in char were determined by inductively coupled plasma-optical emission spectroscopy. The char chemical structure was characterized by Fourier transform-Raman spectroscopy. Our results show that the char-O 2 reactivity is greatly related to the Raman sensitive O-containing functional groups at the initial stage of char formation (short residence time at 600 °C during pyrolysis). As char pyrolysis proceeded to higher temperature, the loss of O-containing functional groups and the condensation of aromatic ring systems play a key role in the decreasing magnitude of char-O 2 reactivity. The chemical structure of 1200 °C pyrolysis char is relatively stable, thereby posing limited effect on the changes in char-O 2 reactivity. For Loy Yang brown coal, the volatilization of alkali and alkaline earth metallic species during pyrolysis at 1200 °C became the dominant reason for the observed decreases in char-O 2 reactivity.

    Related items

    Showing items related by title, author, creator and subject.

    • Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal
      Li, T.; Zhang, L.; Dong, Li; Wang, Shuai; Song, Y.; Wu, L.; Li, Chun-Zhu (2017)
      © 2017 Elsevier LtdThis study is focused on the effects of char structure and alkali and alkaline earth metallic (AAEM) species on the changes in char-O2 reactivity for a Western Australian Collie sub-bituminous coal. The ...
    • Changes in char structure during the thermal treatment of nascent chars in N2 and subsequent gasification in O2
      Zhang, L.; Li, T.; Wang, Shuai; Song, Y.; Dong, Li; Zhang, Shu; Li, Chun-Zhu (2017)
      © 2017 Elsevier LtdThis study aims to investigate the structural features of nascent char. Two nascent chars were prepared from the pyrolysis of Loy Yang brown coal and Collie sub-bituminous coal in a wire-mesh reactor ...
    • Emission of inorganic particulate matter during the combustion of biomass, biochar and Collie coal
      Gao, Xiangpeng (2011)
      Coal is an important part of Australia's energy mix and is expected to continue to play an essential role in supplying cheap and secure energy for powering the Australian economy in the foreseeable future. However, ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.