Journal
ENERGY
Volume 153, Issue -, Pages 776-787Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2018.04.091
Keywords
Co-combustion; Anthracite; Dried sawdust sludge; Conversion ratio of combustible substances; Micromorphology; Constituent evolution
Categories
Funding
- Natural Science Foundation of China [51708213]
- National Key Research and Development Plan [2016YFC0203705, 2016YFC0203701-02, 2017YFC0210603]
- Fujian Provincial Bureau of Quality and Technical Supervision [FJQI2016014]
- Natural Science Fund Project of Fujian Provincial Department of Science Technology [2018J0102]
- China Scholarship Council
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This paper studied the synergistic behaviors of anthracite and dried sawmill sludge (DSS) in the conversion ratio (CR) of combustible substances, micromorphology variation and constituents' evolutions. The results showed that the blend CRs were the highest, and CRs increased with O-2 and temperature. In ash formation, DSS mainly contributed to the fly ash yield, while anthracite determined the morphology of bottom ash. The carbon proportion of combusted blend decreased to 0, revealing its thorough combustion, thereby proving the synergistic effects between anthracite and DSS. The disappearances of C=C, -CH2- and O-H determined by FT-IR indicated the burning losses of kinds of hydrocarbons, meanwhile the identified enlarged bands of Si-O, Al-O and Fe-O suggested the formations of inorganic compounds. The XRD results further demonstrated the formations of SiO2, Al2O3, CaSO4 and Fe2O3, the rising temperature promoted their melting/conglomeration process, thereby lowering the XRD peaks since the mischcrystals generations. The oxygen-enrich atmosphere inhibited the formations of SiO2 and Al2O3 but promoted the generation of Fe2O3, and accelerated the formation of porous-smooth ash. The addition of CaCO3 assisted the pore formation and integrated the metal-oxides crystals. Urea made the particles welly dispersed, and weakened the XRD peaks since it improved the melting process. (C) 2018 Elsevier Ltd. All rights reserved.
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