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    Effect of the addition of different waste carbonaceous materials on coal gasification in CO2 atmosphere

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    Publication date
    2016-08
    Author
    Parvez, A.M.
    Mujtaba, Iqbal M.
    Pang, C.
    Lester, E.H.
    Wu, T.
    Keyword
    CO2 gasification; Carbonaceous materials; Interactions; Catalytic effect; Co-processing
    Rights
    © 2016 Elsevier B.V. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    In order to evaluate the feasibility of using CO2 as a gasifying agent in the conversion of carbonaceous materials to syngas, gasification characteristics of coal, a suite of waste carbonaceous materials, and their blends were studied by using a thermogravimetric analyser (TGA). The results showed that CO2 gasification of polystyrene completed at 470 °C, which was lower than those of other carbonaceous materials. This behaviour was attributed to the high volatile content coupled with its unique thermal degradation properties. It was found that the initial decomposition temperature of blends decreased with the increasing amount of waste carbonaceous materials in the blends. In this study, results demonstrated that CO2 co-gasification process was enhanced as a direct consequence of interactions between coal and carbonaceous materials in the blends. The intensity and temperature of occurrence of these interactions were influenced by the chemical properties and composition of the carbonaceous materials in the blends. The strongest interactions were observed in coal/polystyrene blend at the devolatilisation stage as indicated by the highest value of Root Mean Square Interaction Index (RMSII), which was due to the highly reactive nature of polystyrene. On the other hand, coal/oat straw blend showed the highest interactions at char gasification stage. The catalytic effect of alkali metals and other minerals in oat straw, such as CaO, K2O, and Fe2O3, contributed to these strong interactions. The overall CO2 gasification of coal was enhanced via the addition of polystyrene and oat straw.
    URI
    http://hdl.handle.net/10454/8280
    Version
    Accepted Manuscript
    Citation
    Parvez A M, Mujtaba I M, Pang C, Lester E and Wu T (2016) Effect of the addition of different waste carbonaceous materials on coal gasification in CO2 atmosphere. Fuel Processing Technology. 149: 231-238.
    Link to publisher’s version
    http://dx.doi.org/doi:10.1016/j.fuproc.2016.04.018
    Type
    Article
    Collections
    Engineering and Informatics Publications

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