Dissertação
PLASTIC WASTES TO ENERGY: PYROLYSIS SIMULATION BY THERMOGRAVIMETRY EVALUATED
The world is finally waking up to the plastic problem which is like a ticking time bomb set to explode with the increasing amount of plastic waste that is been generated daily. This research work studied the thermal degradation of plastic waste and kinetic modelling process which can be useful in the determination of key operating design and parameters. Kinetic modelling requires significant amount of information about kinetic parameters, especially the activation energy. Thermogravimetric analysis (TGA) was used to obtain kinetic data with degradation taking place in a single step process. The kinetic analysis was studied by conventional thermogravimetric technique (Direct Arrhenius Method, Coat & Redfern and Horowitz and Metzger) with single heating rate(30oC/min) in nitrogen atmosphere for the different plastic waste. The activation energy obtained using the different approach for the plastic ABS_White, ABS_Blue, ABS (30) PS, LDPE, NYLON and PET was (219, 240, 188, 222, 260, 175, 304), (226, 189, 224, 382,275,186, 347) kJ/mol respectively. The result obtained using these models were in accordance with published data however these models use unrealistic assumptions that may not be accurate in predicting the true degradation behavior of the polymer, hence it cannot give a proper understanding of how pyrolysis occur and how the process can be optimized thus the reason for the distributed activation energy analysis model (DAEM) The DAEM algorithm was developed using MATLAB with data obtained from TGA experiments which was used in calculation of kinetic parameters.
novembro 29, 2019, 11:0
Publicação
Obra sujeita a Direitos de Autor
Orientação
ORIENTADOR
Ana Paula Vieira Soares Pereira Dias
Departamento de Engenharia Química (DEQ)
Professor Auxiliar
