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Energies 2018, 11(7), 1799; https://doi.org/10.3390/en11071799

A Novel Method of Kinetic Analysis and Its Application to Pulverized Coal Combustion under Different Oxygen Concentrations

1
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
2
Comprehensive Management Department, CNOOC Energy Conservation & Environmental Protection Service Co., Ltd., Tianjin 300452, China
3
International Department, RDFZ Xishan School, Beijing 100193, China
*
Authors to whom correspondence should be addressed.
Received: 30 May 2018 / Revised: 29 June 2018 / Accepted: 4 July 2018 / Published: 9 July 2018
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Abstract

Currently, many efforts have been made to improve the approach to build kinetic models. Based on mathematical algorithms, a novel method (named DIM method) of kinetic analysis was introduced in detail. A formula combining differential and integral was deduced and applied to the determination of the mechanism function f(α). Subsequently, multivariable linear regression was conducted to simultaneously obtain the apparent activation energy E, pre-exponential factor A, and oxygen concentration exponent n. In the application of pulverized coal combustion under different oxygen concentrations (3%, 5%, 10%, 15%, and 21%), E, A, and n were calculated as 258,164 J/mol, 6.660 × 1017 s−1, and 3.326, respectively, and the mechanism function f(α) was determined as the Avrami-Erofeev equation. A validation was performed under a 7% oxygen concentration, which shows that the DIM method has a higher accuracy. This work can provide a reference for the study of kinetic analysis. View Full-Text
Keywords: kinetic analysis; pulverized coal combustion; thermogravimetry-differential thermogravimetry (TG-DTG); multivariable linear regression kinetic analysis; pulverized coal combustion; thermogravimetry-differential thermogravimetry (TG-DTG); multivariable linear regression
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Gou, X.; Zhang, Q.; Liu, Y.; Wang, Z.; Zou, M.; Zhao, X. A Novel Method of Kinetic Analysis and Its Application to Pulverized Coal Combustion under Different Oxygen Concentrations. Energies 2018, 11, 1799.

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