A critical review of the correlative effect of process parameters on pyrolysis of plastic wastes

Vaishnavi, Mahadevan; Vasanth, Prasad Mohan; Rajkumar, S.; Gopinath, Kannappan Panchamoorthy; Devarajan, Yuvarajan

doi:10.1016/j.jaap.2023.105907

Cited by 16 publications

(8 citation statements)

References 130 publications

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“…In any case, it does seem that in the experiments at the highest temperature (460 °C), there was a greater generation of gases than in the rest (42–44 wt.%), except for the previously mentioned anomalous run #1. The increase in the production of gases at the expense of liquids with increasing temperatures is a known fact in the pyrolysis of plastic waste, which supports this appreciation [ 3 ]. Therefore, by discarding this temperature and 420 °C due to insufficient decomposition of the sample, it can be concluded that the optimum temperature range for the production of oil from this sample is 430–450 °C, with residence times between 45 and 60 min.…”

Section: Resultsmentioning

confidence: 83%

“…•100 (3) design (Run #7-#9, 445/53). The graphical representation of the experimental conditions used is shown in Figure 1.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

“…Pyrolysis is one of the techniques considered to be a chemical recycling alternative. It is a thermal process (350–900 °C) in the absence of fed air and it can produce solid, gaseous and liquid products of different characteristics and industrial value depending on the type of waste and the operating variables [ 3 ]. When post-consumer plastic waste is pyrolysed, the desired product is usually liquid, which is commonly known as pyrolysis oil because it is a mixture of organic substances in the same way as mineral oils or refinery streams.…”

Section: Introductionmentioning

confidence: 99%

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A Preliminary Study on the Use of Highly Aromatic Pyrolysis Oils Coming from Plastic Waste as Alternative Liquid Fuels

Asueta,

Fulgencio-Medrano,

Miguel-Fernández

et al. 2023

Materials

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In this work, the low-temperature pyrolysis of a real plastic mixture sample collected at a WEEE-authorised recycling facility has been investigated. The sample was pyrolysed in a batch reactor in different temperature and residence time conditions and auto-generated pressure by following a factorial design, with the objective of maximising the liquid (oil) fraction. Furthermore, the main polymers constituting the real sample were also pyrolysed in order to understand their role in the generation of oil. The pyrolysis oils were characterised and compared with commercial fuel oil number 6. The results showed that in comparison to commercial fuel oil, pyrolysis oils coming from WEEE plastic waste had similar heating values, were lighter and less viscous and presented similar toxicity profiles in fumes of combustion.

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Section: Resultsmentioning

confidence: 83%

“…•100 (3) design (Run #7-#9, 445/53). The graphical representation of the experimental conditions used is shown in Figure 1.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Preliminary Study on the Use of Highly Aromatic Pyrolysis Oils Coming from Plastic Waste as Alternative Liquid Fuels

Asueta,

Fulgencio-Medrano,

Miguel-Fernández

et al. 2023

Materials

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“…The authors developed a model for predicting pyrolysis products based on the Coats-Redfern method and the Kissinger method (Figure 9). The actual reaction patterns of waste pyrolysis, including biomass and plastics, are extremely complex due to the formation of over one hundred intermediate products [117,143,144]. RDF is a special type of waste that is more complex than biomass due to its heterogeneous nature [72].…”

Section: Wood Grass and Cropsmentioning

confidence: 99%

Methods and Validation Techniques of Chemical Kinetics Models in Waste Thermal Conversion Processes

Skrzyniarz,

Sajdak,

Biniek-Poskart

et al. 2024

Energies

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This article discusses the potential of using computer-simulation methods in processes such as thermal waste conversion, i.e., pyrolysis, gasification, combustion and torrefaction. These methods are gaining in importance, among others, due to the difficulties in execution and high costs associated with conducting experimental research in real conditions or the need to obtain detailed data on the phenomenon under study in a relatively short time. Computer simulation also allows for numerous errors to be avoided, such as those that may occur during optimization activities, the effects of which may have serious consequences, both economic and environmental. In addition to their many advantages, the limitations and disadvantages of using computer-simulation methods were also indicated, mainly related to the interpretation and validation of the results obtained using modelling. Owing to the complexity of the phenomena occurring during thermal conversion, special attention was focused on models based on chemical kinetics, thanks to which it is possible to predict the quantitative and qualitative composition of products in these processes. The aim of this research is to identify the research gap in the field of issues related to models of chemical kinetics of thermal waste conversion processes.

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“…Estimated Pearson's Correlation Coefficient between input and output variables. According to the data set for the five initial input variables and the three initial output variables, the Pearson Correlation Coefficient (PCC) test result for pairwise correlation between the initial input variable and the initial output variables in 2021 are displayed as Fig.3[41]. From PCC test result in Fig.3, it can be found that the five initial input variables and the three initial output variables are positive.…”

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confidence: 99%

Analysis of comprehensive operation efficiency of urban environmental sanitation in China

Wei

Zhao

2023

Preprint

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ABASTRACT With the development of China’s economy, the level of Urban Environmental Sanitation management has far-reaching impact on the ecological environment. The well comprehensive operation efficiency of urban environmental sanitation in China can help China achieve the goal of carbon peak and carbon neutralization. The study applied data envelopment analysis (DEA) and Malmquist productivity index (MPI) to explore the comprehensive operation efficiency of urban environmental sanitation in China. The statistical data of the 31 provinces over the period of 2017 to 2021 are gathered as inputs and outputs of the DEA model and MPI model. It finds out that the mean of comprehensive operation efficiency of urban environmental sanitation in each year during the research period was no DEA efficiency in general. The change trend of MPI from 2017 to 2021 was negative growth. According to MPI and its decomposition of China by nation, Technology Change (Techch) was the main driving factor of MPI growth. Comprehensive operation efficiency of urban environmental sanitation should be expanded and the technology innovation of Urban facilities in China needs to be promoted vigorously.

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A critical review of the correlative effect of process parameters on pyrolysis of plastic wastes

Cited by 16 publications

References 130 publications

A Preliminary Study on the Use of Highly Aromatic Pyrolysis Oils Coming from Plastic Waste as Alternative Liquid Fuels

A Preliminary Study on the Use of Highly Aromatic Pyrolysis Oils Coming from Plastic Waste as Alternative Liquid Fuels

Methods and Validation Techniques of Chemical Kinetics Models in Waste Thermal Conversion Processes

Analysis of comprehensive operation efficiency of urban environmental sanitation in China

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