Non-isothermal kinetics of styrene-butadiene-styrene asphalt combustion

doi:10.1088/1674-1056/22/6/068801

Abstract The combustion characteristics of styrene-butadiene-styrene (SBS) asphalt are studied by thermogravimetric analysis (TG/DTG) at four different heating rates. According to the saturates/aromatics/resins/asphaltenes (SARA) fractionation method, the combustion process of SBS asphalt can be divided by Gaussian peak fitting into three main stages: oil content release, resin pyrolysis, and asphaltene and char combustion. When the heating rate increases, the mass losses of the oil content and resin pyrolysis increase, and less asphaltenes are formed at a higher temperature. The activation energy values are calculated by the Coats-Redfern method to be in the range 61.6 kJ/mol-142.9 kJ/mol. The Popescu method is used for the kinetic analysis, and the result shows that the three stages of asphalt combustion can be explained by the sphere phase boundary reaction model, the second order chemical reaction model, nucleation, and its subsequent growth model, respectively.

Keywords: SBS asphalt combustion non-isothermal kinetic TG/DTG

Received: 14 August 2012
Revised: 31 October 2012
Accepted manuscript online:

PACS:	88.20.jj	(Combustion)
	88.05.Np	(Environmental aspects)
	88.05.De	(Thermodynamic constraints on energy production)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61154002 and 51078331), the China Postdoctoral Science Foundation (Grant No. 20090451471), and the Zhejiang Provincial Natural Science Foundation, China (Grant No. Z1110222).

Corresponding Authors: Huang Zhi-Yi
E-mail: hzy@zju.edu.cn

Cite this article:

Wu Ke (吴珂), Zhu Kai (朱凯), Han Jun (韩君), Wang Jin-Chang (王金昌), Huang Zhi-Yi (黄志义), Liang Pei (梁培) Non-isothermal kinetics of styrene-butadiene-styrene asphalt combustion 2013 Chin. Phys. B 22 068801

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Non-isothermal kinetics of styrene-butadiene-styrene asphalt combustion

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