Characteristics and kinetic studies of Hydrilla verticillata pyrolysis via thermogravimetric analysis.

Zhiquan Hu, Zhihua Chen, Genbao Li, Xiaojuan Chen, Mian Hu, Mahmood Laghari, Xun Wang, Dabin Guo

Journal: Bioresource technology 2016;194():364-72

PMID: 26210527

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Abstract

The pyrolysis characteristics and kinetic of Hydrilla verticillata (HV) have been investigated using non-isothermal thermogravimetric analysis. The results showed that the pyrolysis behavior of HV can be divided into two independent stages. The kinetics of Stage I was investigated using a distributed activation energy model (DAEM) with discrete 99 first-order reactions. Stage II was an independent stage which corresponds to the decomposition of calcium oxalate, whose kinetics was studied using iso-conversional method together with compensation effect and master-plots method. The activation energies ranged from 92.39 to 506.17 and 190.42 to 222.48 kJ/mol for the first and second stages respectively. Calculated data gave very good fit to the experimental data.

Address: School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China. Electronic address: [email protected].

DOI: 10.1016/j.biortech.2015.07.007

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MeSH Terms: Calcium Carbonate, Calcium Oxalate, Chemistry, Physical, Hot Temperature, Hydrocharitaceae, Kinetics, Models, Statistical, Models, Theoretical, Thermogravimetry