Process parameter optimization study on thermolytic polystyrene liquid fuel using response surface methodology (RSM)

Selvaganapathy, T.; Muthuvelayudham, R.; Jayakumar, M.

doi:10.1016/j.matpr.2020.02.572

Cited by 10 publications

(9 citation statements)

References 17 publications

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“…However, the p value for feedstock particle size (single term) is 0.111, more significant than 0.05, which means that its effect on liquid oil yield is insignificant. Selvaganapathy et al [11] also observed a less significant effect of feedstock particle size on liquid oil yield from pyrolysis of waste PS. The combined effect of residence time and feedstock particle size can be demonstrated from the 3D surface and 2D contour plots in Figure 8a,b.…”

Section: Interactions Of the Process Parameters On Ppo Yieldmentioning

confidence: 96%

“…There has been limited exploration using response surface methodology (RSM) to fine-tune the waste plastic pyrolysis process. In a study by Selvaganapathy et al [11], the process parameters were optimised to increase the yield of liquid fuel in the pyrolysis of waste polystyrene. A pyrolytic reaction with a 1 kg capacity was used, and the experiments were designed using a central composite design (CCD) matrix in RSM with Design Expert 12 statistical programming software.…”

Section: Introductionmentioning

confidence: 99%

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Optimisation of Process Parameters to Maximise the Oil Yield from Pyrolysis of Mixed Waste Plastics

Faisal,

Rasul,

Chowdhury

et al. 2024

Sustainability

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The study sought to optimise process parameters of thermal pyrolysis of mixed waste plastic (MWP) to maximise pyrolytic oil yield. High-density polyethylene (HDPE), polypropylene (PP), and polystyrene (PS) were used as feedstocks for pyrolysis. Response surface methodology (RSM) and Box–Behnken design (BBD) were used to optimise the pyrolysis process. The optimisation was carried out by varying three independent variables, namely, reaction temperature (460–540 °C), residence time (30–150 min), and size of MWP feedstock (5–45 mm), to increase the liquid oil yield. A BBD matrix was used to generate the design of the experiments, and 15 experiments were conducted. The highest liquid oil yield of 75.14 wt% was obtained by optimising the operating parameters, which were a reaction temperature of 535.96 °C, a reaction time of 150 min, and a feedstock particle size of 23.99 mm. A model was developed to determine the relationships among the independent variables, and analysis of variance (ANOVA) was used to investigate their impact on maximising oil yield. ANOVA results showed that the temperature and residence time had the maximum impact on oil yield, followed by feedstock size. Physicochemical analysis of the properties of the plastic pyrolytic oil (PPO) revealed that the crude PPO obtained from the MWP had higher water (0.125 wt%) and sulfur content (5.12 mg/kg) and lower flash point (<20 °C) and cetane index (32), which makes it unsuitable for use as an automobile fuel. However, these issues can be resolved by upgrading the PPO using different posttreatment techniques, such as distillation and hydrotreatment.

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Section: Interactions Of the Process Parameters On Ppo Yieldmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Optimisation of Process Parameters to Maximise the Oil Yield from Pyrolysis of Mixed Waste Plastics

Faisal,

Rasul,

Chowdhury

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…In order to examine the aforementioned assumptions to mathematically describe and quantify each of them, the Box-Behnken design was used as a specific type of response surface methodology (RSM). RSM is commonly applied in the description of various processes [30][31][32][33], especially in the description of the pyrolysis of plastics [34][35][36][37][38][39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Effect of Feed Mass, Reactor Temperature, and Time on the Yield of Waste Polypropylene Pyrolysis Oil Produced via a Fixed-Bed Reactor

Papuga,

Savković,

Djurdjevic

et al. 2024

Polymers

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This paper presents the results of investigations into the pyrolysis of waste polypropylene in a laboratory fixed-bed batch reactor. The experiments were designed and verified in such a way as to allow the application of the response surface methodology (RSM) in the development of an empirical mathematical model that quantifies the impacts mentioned above. The influence of the mass of the raw material (50, 100, and 150 g) together with the reactor temperature (450, 475, and 500 °C) and the reaction time (45, 50 and 75 min) was examined. It has been shown that the mass of the raw material, i.e., the filling volume of the reactor, has a significant influence on the pyrolysis oil yield. This influence exceeds the influence of reactor temperature and reaction time. This was explained by observing the temperature change inside the reactor at three different spots at the bottom, middle, and top of the reactor. The recorded temperature diagrams show that, with greater masses of feedstock, local overheating occurs in the middle part of the reactor, which leads to the overcracking of volatile products and, from there, to an increased formation of non-condensable gases, i.e., a reduced yield of pyrolytic oil.

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“…RSM is commonly applied in the description of various processes [23][24][25][26], especially in the description of pyrolysis of plastics [27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Effect of Feed Mass, Reactor Temperature and Time on Yield of Waste Plastic Pyrolysis Oil Produced via a Fixed Bed Reactor

Papuga,

Savković,

Djurdjevic

et al. 2024

Preprint

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This paper presents the results of investigations into the pyrolysis of waste polypropylene in a laboratory fixed-bed batch reactor. The experiments were designed and verified in such a way as to allow the application of the Response Surface Methodology (RSM) in the development of an empirical mathematical model that quantifies the impacts mentioned above. The influence of the mass of the raw material (50, 100 and 150 g), together with the reactor temperature (450, 475 and 500 °C) and the reaction time (45, 50 and 75 min) was examined. It has been shown that the mass of the raw material, i.e. the filling volume of the reactor, has a significant influence on the pyrolysis oil yield. This influence exceeds the influence of reactor temperature and reaction time. This was explained by observing the temperature change inside the reactor at three different spots at the bottom, middle and top of the reactor. Recorded temperature diagrams show that with greater masses of feedstock, local overheating occurs in the middle part of the reactor, which leads to overcracking of vapor products, and from there to an increased formation of non-condensable gases, i.e. reduced yield of pyrolytic oil.

show abstract

Process parameter optimization study on thermolytic polystyrene liquid fuel using response surface methodology (RSM)

Cited by 10 publications

References 17 publications

Optimisation of Process Parameters to Maximise the Oil Yield from Pyrolysis of Mixed Waste Plastics

Optimisation of Process Parameters to Maximise the Oil Yield from Pyrolysis of Mixed Waste Plastics

Effect of Feed Mass, Reactor Temperature, and Time on the Yield of Waste Polypropylene Pyrolysis Oil Produced via a Fixed-Bed Reactor

Effect of Feed Mass, Reactor Temperature and Time on Yield of Waste Plastic Pyrolysis Oil Produced via a Fixed Bed Reactor

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