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

    Impacts of inherent o-containing functional groups on the surface properties of shengli lignite

    Access Status
    Fulltext not available
    Authors
    Wang, Y.
    Zhou, J.
    Bai, L.
    Chen, Y.
    Zhang, Shu
    Lin, X.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wang, Y. and Zhou, J. and Bai, L. and Chen, Y. and Zhang, S. and Lin, X. 2014. Impacts of inherent o-containing functional groups on the surface properties of shengli lignite. Energy and Fuels. 28 (2): pp. 862-867.
    Source Title
    Energy and Fuels
    DOI
    10.1021/ef402004j
    ISSN
    0887-0624
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/55656
    Collection
    • Curtin Research Publications
    Abstract

    Shengli (SL) lignite was thermally treated by heating at 200-350 C in an effort to reduce the number of O-containing functional groups and water present. The presence of carboxyl groups, phenolic hydroxyl groups, and methoxy groups was characterized using a chemical titration method. The moisture holding capacity (MHC), wettability, and ? potential of the SL lignite were measured before and after the low-temperature heat treatment. The results revealed that the main reactions that occurred below 350 C were decarboxylation and dehydration, corresponding to the decomposition of more than 60% of the carboxyl groups and phenolic hydroxyl groups. SL lignite treated at 350 C displayed an approximately 50% reduction in its MHC. The O-containing functional groups (the carboxyl groups, in particular) played an important role in water adsorption, indicating that the formation of the hydrogen bond between the O-containing functional groups and water contributed most significantly to the water adsorption process. The contact angle decreased as the number of hydrophilic sites decreased as a result of the decomposition of O-containing functional groups. The ? potential of the SL lignite decreased significantly as the concentration of O-containing functional groups decreased. MHC was successfully correlated with the presence of O-containing functional groups and the quantity of surface area without oxygen groups, as follows: MHC = 2.655[-COOH] + 2.912[-OH] + 0.209[-OCH 3 ] - 3.321S non-O + 1.341, where S non-O for the lignite is defined as S non-O = S i (1 - C i /C 0 ), where S i is the surface area of the lignite and C i and C 0 are the total contents of O-containing functional groups in the heat-treatment or as-received lignites. © 2014 American Chemical Society.

    Related items

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

    • Effects of steam on the reactivity and microstructure of char from in-situ gasification of brown coal
      Xu, X.; Wang, Y.; Chen, G.; Chen, Z.; Qin, Z.; Dai, J.; Zhang, Shu; Xu, D. (2015)
      ©, 2015, Science Press. All right reserved. To examine the effects of steam on the char reactivity and its microstructure, experiments of drying and pyrolysis of brown coal as well as the in-situ gasification of "hot" ...
    • The organic geochemistry of marine-influenced coals.
      Sandison, Carolyn M. (2001)
      The importance of organic sulphur fixation in the preservation of organic matter in humic coal-forming environments is demonstrated in this thesis. The transgression of coal depositional systems by marine waters during ...
    • The occurrence and origins of some alkylphenols in crude oils
      Ioppolo-Armanios, Marisa (1996)
      Analytical procedures have been developed for the quantitative analysis of phenols in crude oils and sedimentary rock pyrolysates and extracts. The procedures involve isolation of the phenolic components of the sedimentary ...
    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.