Journal
BIORESOURCE TECHNOLOGY
Volume 166, Issue -, Pages 243-251Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.05.076
Keywords
Coal gangue; Agricultural biomass; Co-combustion; Reactivity; Trace element
Funding
- National Basic Research Program of China (973 Program) [2014CB238903]
- National Science and Technology Support Program [2012BAC10B02]
- Key Program for Science and Technology Development of Anhui Province [12010 402111]
- National Natural Science Foundation of China [4117 3032, 41373110]
- Creative project of the Huainan Mining Industry (Group) Co. Ltd.
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The thermal decomposition behavior of coal gangue, peanut shell, wheat straw and their blends during combustion were determined via thermogravimetric analysis. The coal gangue/agricultural biomass blends were prepared in four weight ratios and oxidized under dynamic conditions from room temperature to 1000 degrees C by various heating rates. Kinetic models were carried out to evaluate the thermal reactivity. The overall mass balance was performed to assess the partition behavior of coal gangue, peanut shell and their blends during combustion in a fixed bed reactor. The decomposition processes of agricultural biomass included evaporation, release of volatile matter and combustion as well as char oxidation. The thermal reactivity of coal gangue could be improved through the addition of agricultural biomass in suitable proportion and subsequent appropriate heating rate during combustion. In combination with the heating value and base/acid ratio limitations, a blending ratio of 30% agricultural biomass is conservatively selected as optimum blending. (C) 2014 Elsevier Ltd. All rights reserved.
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