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    Application of Concrete and Demolition Waste as CO2 Sorbent in Chemical Looping Gasification of Biomass

    Access Status
    Fulltext not available
    Authors
    Moghtaderi, B.
    Zanganeh, J.
    Shah, K.
    Wu, Hongwei
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Moghtaderi, B. and Zanganeh, J. and Shah, K. and Wu, H. 2012. Application of Concrete and Demolition Waste as CO2 Sorbent in Chemical Looping Gasification of Biomass. Energy & Fuels. 26 (4): pp. 2046-2057.
    Source Title
    Energy & Fuels
    DOI
    10.1021/ef300145t
    ISSN
    08870624
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/8644
    Collection
    • Curtin Research Publications
    Abstract

    This paper summarizes the results of an experimental investigation into sorbent chemical looping gasification (SCLG) of biomass for the production of high-purity hydrogen and in situ capture of the resulting CO2. The key innovation was the use of concrete and demolition waste (CDW) as the source of CO2 sorbent. A comprehensive series of thermogravimetric analysis (TGA) experiments was carried out over a range of temperatures between 650 and 900 °C and pressures up to 20 atm to benchmark the CO2 capture efficiency of CDW against conventional lime-based sorbents [e.g., calcined limestone (CL) and hydrated Portland cement (HPC)]. Effects of controlling parameters, such as the Ca/C ratio, steam/carbon (S/C) ratio, steam partial pressure, and total pressure, on the gas yield, gas composition, and CO2 capture efficiency were thoroughly examined. Experimental results confirmed that CO2 capture efficiencies as high as 56.4% and high-grade hydrogen production can be achieved when CDW is used as a sorbent. These results combined with the high mechanical strength, durability, and low cost make CDW an attractive sorbent for chemical looping gasification of carbonaceous solid fuels, particularly biomass.

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