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    A Method for the Quantification of Alkali and Alkaline Earth Metallic Species in Bioslurry Fuels

    Access Status
    Fulltext not available
    Authors
    Zhang, Mingming
    Gao, Xiangpeng
    Wu, Hongwei
    Date
    2013
    Type
    Journal Article
    
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    Citation
    Zhang, Mingming and Gao, Xiangpeng and Wu, Hongwei. 2013. A Method for the Quantification of Alkali and Alkaline Earth Metallic Species in Bioslurry Fuels. Energy & Fuels. 27: pp. 6823-6830.
    Source Title
    Energy & Fuels
    DOI
    10.1021/ef401632h
    ISSN
    0887-0624
    URI
    http://hdl.handle.net/20.500.11937/42342
    Collection
    • Curtin Research Publications
    Abstract

    This study reports a method for the quantification of alkali and alkaline earth metallic (AAEM) species in bioslurry fuels. The so-called evaporation-ashing-digestion-ion chromatography (IC) method consists of four steps, including evaporation that converts bioslurry into solid-like residue, ashing that converts the residue into ash, acid digestion that dissolves the ash into a solution, and IC analysis that quantifies the AAEM species in the solution. The novelty of the method is the combination of the evaporation step with the existing ashing-digestion-IC method that is developed for solid fuels but notsuitable for bioslurry fuels. The evaporation step consists of multi-steps of slow heating and holding at various segment temperatures corresponding to the boiling points of the major compounds in bio-oil, resulting in progressive evaporation of biooil vapors with little carry-over of biochar particles. The method has been successfully applied for quantifying AAEM species in bioslurry fuels with various biochar loading levels (5-20 wt %), with small relative standard errors (within ±3%) and low limitations of quantification (0.4-3.0 ppm). It also overcomes the biochar incomplete oxidation issue associated with the microwave-digestion-based methods, which considerably underestimate the concentrations of AAEM species in bioslurry fuels.

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