Study on the Kinetics of Plant Oil Asphalt Pyrolysis Using Thermogravimetry and the Distributed Activation Energy Model

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• 作者：Qiang Tang ; Yanyan Zheng ; Tiefeng Wang ; Jinfu Wang
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：March 20, 2014
• 年：2014
• 卷：28
• 期：3
• 页码：2035-2040
• 全文大小：389K
• 年卷期：v.28,no.3(March 20, 2014)
• ISSN：1520-5029

文摘

Plant oil asphalt (POA) is a new concerned lipid-based residue biomass generated from the oleochemical industry. In this work, the pyrolysis kinetics of POA was studied by thermogravimetric analysis at heating rates of 7, 10, 20, and 30 K min^鈥? under a nitrogen atmosphere using the distributed activation energy model (DAEM). The kinetic parameters, including the activation energy E, distribution function of activation energy f(E), and pre-exponential factor k₀, were obtained. The activation energy E ranged from 75 to 300 kJ mol^鈥?, and the f(E) curve showed a broad peak around 155鈥?00 kJ mol^鈥?. The linear relationship between ln k₀ and activation energy E indicated that there existed a kinetic compensation effect in pyrolysis of POA. A double-Gaussian DAEM was employed for simulation of POA pyrolysis by assuming POA as a mixture of two pseudo-components. In comparison to the single-Gaussian DAEM, the double-Gaussian DAEM was better to predict the pyrolysis behavior of POA. This work validated the applicability of the double-Gaussian DAEM to the lipid-based material POA.