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Thermochemical Degradation of Polypropylene: Energy and Exergy Analysis in a Tubular Reactor

Cruz Jose Nolasco, Hernández Irma Pérez, Villalobo María de Lourdes Castellanos, Henández Angélica Pérez, Ávila Juan José López

Journal of Ecological Engineering

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2023

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Vol. 24, nr 5

14--21

EN

One method to evaluate the energy behavior is energy and exergy analysis. These analyses applied to waste-to-energy conversion technologies provide the information on operating conditions, facilitating energy optimization processes. In this study, an energetic and exergy analysis was used on the thermochemical degradation process of polypropylene in a tubular reactor at 600 °C with a speed of 15 °C min-1. The experimental data used in this work were taken from the study by Parku et al. (2020). According to the results, energy efficiencies of up to 43% and exergy efficiencies of 38% were achieved, and it was also observed, according to what was reported, that the products obtained from pyrolysis contain a high calorific value and can be used as alternative fuels.

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Review of the Thermochemical Degradation of PET: An Alternative Method of Recycling

Cruz José Nolasco, Martínez Karla Donjuan, Zavariz Álvaro Daniel, Hernández Irma Pérez

Journal of Ecological Engineering

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2022

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Vol. 23, nr 9

319--330

EN

Plastics play an important role in our lives due to their versatility, lightness and low production cost. They can be found in almost every industry such as automotive, construction, packaging, medical, and engineering applications among others. Polyethylene terephthalate (PET) is one of the most consumed plastics worldwide in the packaging sector, which is why its useful life is usually very short, causing serious problems due to high disposal in the environment and urban landfills. The thermochemical degradation of PET has been studied by some researchers and it has been found that its degradation products are of high added value, which is why this work focuses on presenting the results obtained in the literature.

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Pyrolytic Liquid Fuel – An Alternative for Producing Electrical Energy in Mexico

Cruz José Nolasco, Ávila Juan José López, Martínez Karla Donjuan, Hernández Irma Pérez, Zavariz Álvaro Daniel

Journal of Ecological Engineering

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2022

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Vol. 23, nr 12

227--232

EN

Millions of tons of urban solid waste are discarded yearly in Mexico. The rapid population growth, urbanization, and social development, together with a more significant number of inhabitants, resulted in a massive amount of municipal solid waste (MSW) that is increasing yearly. Most of these end up in landfills without being used for energy, causing severe social and environmental problems. Municipal solid waste (MSW) is the most significant main waste stream (representing 9.21% of the waste that can be used), including plastic bottles, food dishes, cans, bags, and containers. The recycling and sustainable disposal of plastic waste is a significant activity with a high rate of complexity due to various effects that occur during its processes, such as obstructions in mechanisms and pipes, prolonged degradation and biodegradation rates, and the presence of additives, and highly toxic dyes. Pyrolysis is one of the promising technologies for converting waste into sound energy capable of being used in various applications such as power generation, transportation fuel, and multiple thermal purposes. According to the Ministry of Energy (SENER), Mexico has an installed generation capacity of 86,034 MW, of which almost 65% is based on fossil-based technologies.