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Distribution-free estimation of f(E) in the distributed activation energy model based on matrix singular value decomposition method

Hongxia Wang and Hui Liu

Beijing University of Chemical Technology, Beijing, China



Abstract: The distribution activation energy model (DAEM) is commonly used for characterizing pyrolysis kinetics of different types of thermally active materials such as coal, biomass, charcoal, polymer, and solid waste. In this work, a new distribution-free method for estimating the activation energy distribution function f(E) in DAEM is developed by establishing a physical and mathematical analogy between DAEM and the integral equation in adsorption. A parameter sensibility analysis of the present method and algorithms for calculating f(E) at different Gaussian distribution parameter, heating rates and pre-exponential factors shows that the present method gives f(E) that leads to predictions of conversion in good agreement with the test data, and applicable to pyrolysis analysis of thermally active solid materials.

Keywords: DAEM ; Parameter estimation ; Biomass pyrolysis ; Matrix singular value decomposition (SVD) 

Full paper is available at

DOI: 10.1007/s11696-019-00742-9


Chemical Papers 73 (8) 1893–1902 (2019)

Wednesday, May 29, 2024

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