Co-pyrolysis of biomass and plastic wastes: investigation of apparent kinetic parameters and stability of pyrolysis oils

2018 7th International Conference on Clean and Green Energy

能源学;生态环境科学

Fekhar, B.^1 ; Miskolczi, N.^1 ; Bhaskar, T.^2 ; Kumar, J.^2 ; Dhyani, V.^2

University of Pannonia, Faculty of Engineering, Institute of Chemical Engineering and Process Engineering, MOL Department of Hydrocarbon and Coal Processing, Egyetem u. 10, Veszprém

H-8200, Hungary^1

CSIR-Indian Institute of Petroleum, Thermo-catalytic Processes Area, Dehradun

248005, India^2

关键词: Apparent kinetic parameters;    Arrhenius equation;    Corrosion property;    First order kinetics;    Fourier transformed infrared spectroscopy;    High density polyethylene(HDPE);    Oxygenated compounds;    Standardized methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/154/1/012022/pdf
DOI  :  10.1088/1755-1315/154/1/012022

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This work is dedicated to the co-pyrolysis of real waste high density polyethylene (HDPE) and biomass (rice straw) obtained from agriculture. Mixtures of raw materials were pyrolyzed in their 0%/100%, 30%/70%, 50%/50%, 70%/30%, 100%/0% ratios using a thermograph. The atmosphere was nitrogen, and a constant heating rate was used. Based on weight loss and DTG curves, the apparent reaction kinetic parameters (e.g., activation energy) were calculated using first-order kinetic approach and Arrhenius equation. It was found that decomposition of pure plastic has approximately 280 kJ/mol activation energy, while that of was considerably less in case of biomass. Furthermore, HDPE decomposition takes by one stage, while that of biomass was three stages. The larger amount of raw materials (100 g) were also pyrolyzed in the batch rig at 550°C to obtain products for analysis focussing to their long-term application. Pyrolysis oils were investigated by Fourier transformed infrared spectroscopy and standardized methods, such as density, viscosity, boiling range determination. It was concluded, that higher plastic ratio in raw material had the advantageous effect to the pyrolysis oil long-term application. E.g., the concentration of oxygenated compounds, such as aldehydes, ketones, carboxylic acids or even phenol and its derivate could be significantly decreased, which had an advantageous effect to their corrosion property. Lower average molecular weight, viscosity, and density were measured as a function of plastic content.