Perspectives on bio-oil recovery from plastic waste

Rajmohan, K. S.; Yadav, Harshit; Vaishnavi, S.; Gopinath, M.; Varjani, Sunita

doi:10.1016/b978-0-444-64321-6.00023-9

Cited by 10 publications

(7 citation statements)

References 45 publications

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“…The aliphatic hydrocarbons can be said to be direct products of LDPE degradation, whereas the majority of the aromatics would have come from PS and PET (Hamidi et al., 2013). However, some aromatic compounds formed could also be as a result of secondary reactions at elevated temperatures (Rajmohan et al., 2020).…”

Section: Resultsmentioning

confidence: 99%

“…The input minimum and maximum values for temperature were 300°C and 500°C, respectively, to include the degradation temperature range for all the feedstocks used in the co‐pyrolysis to produce pyrolysis oil. The values for the minimum and maximum residence time were 90 and 120 minutes, respectively, to allow for maximum conversion of feedstocks to oil (Cepeliogullar & Putun, 2013a; Hartulistiyoso et al., 2015; Onwudili et al., 2009; Park et al., 2002; Rajmohan et al., 2020). The model selected for the description of the process was Scheffe quadratic × linear.…”

Section: Methodsmentioning

confidence: 99%

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Optimization of combined mixture and process variables for the pyrolysis oil yield from co‐pyrolysis of polymeric wastes

Oladunni

Odejobi

Sanda

et al. 2021

Environmental Quality Mgmt

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The combined mixture process variable approach for optimization and prediction of oil yield in co‐pyrolysis of polymeric wastes was investigated in this study using I‐optimal design. The components mixture investigated were low‐density polyethylene (LDPE), polystyrene (PS), and polyethylene terephthalate (PET), whereas the process variables were temperature and residence time. Thirty experimental runs were developed using the I‐optimality criterion to investigate the effect of interaction between the mixture and process parameters on oil recovery from co‐pyrolysis of the polymeric wastes. The data obtained were used to generate a model equation, and analysis of variance was used to estimate the significance of the model. The model was significant with a P value < 0.0001, the R2 value of 0.9980, adjusted R2 of 0.9949, and predicted R2 of 0.9201. Optimized oil yield showed close match between actual and predicted responses with a desirability factor of 0.999. The predicted mixture compositions and operating parameters for the optimum oil yield were 52.86% for LDPE, 47.15% for PS, and 0% for PET at 471.07°C and 115.25 minutes. The chemical compositions of the pyrolysis oil at the optimum conditions were hydrocarbons in the carbon range between C6 and C25, with physical properties comparable to conventional diesel.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Optimization of combined mixture and process variables for the pyrolysis oil yield from co‐pyrolysis of polymeric wastes

Oladunni

Odejobi

Sanda

et al. 2021

Environmental Quality Mgmt

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“…In this type of reactor, a fluid medium gas or liquid is passed through a solid material at a high enough speed to suspend the solid and make it act as a fluid. The advantages of using a fluidized bed reactor include high heating rates and the ability to control reaction parameters [165,166]. Piao et al developed a fluidized bed reactor using laccase enzyme stabilized in mesoporous silica for the efficient biotransformation of bisphenol A (BPA).…”

Section: Fluidized-bed Reactorsmentioning

confidence: 99%

Challenges and Recent Advances in Enzyme-Mediated Wastewater Remediation—A Review

et al. 2021

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Different classes of artificial pollutants, collectively called emerging pollutants, are detected in various water bodies, including lakes, rivers, and seas. Multiple studies have shown the devastating effects these emerging pollutants can have on human and aquatic life. The main reason for these emerging pollutants in the aquatic environment is their incomplete removal in the existing wastewater treatment plants (WWTPs). Several additional treatments that could potentially supplement existing WWTPs to eliminate these pollutants include a range of physicochemical and biological methods. The use of enzymes, specifically, oxidoreductases, are increasingly being studied for their ability to degrade different classes of organic compounds. These enzymes have been immobilized on different supports to promote their adoption as a cost-effective and recyclable remediation approach. Unfortunately, some of these techniques have shown a negative effect on the enzyme, including denaturation and loss of catalytic activity. This review focuses on the major challenges facing researchers working on the immobilization of peroxidases and the recent progress that has been made in this area. It focuses on four major areas: (1) stability of enzymes upon immobilization, enzyme engineering, and evolution; (2) recyclability and reusability, including immobilization on membranes and solid supports; (3) cost associated with enzyme-based remediation; and (4) scaling-up and bioreactors.

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“…Since the majority of plastic garbage is nonbiodegradable and can take up to 500 years to degrade, around 22% to 43% of it ends up in landfills and prevents soil fertility. Every day, 15,000 tonnes of plastic waste are created in India, but only 6000 tonnes are collected [10]. The creation of fuel or the recycling of valuable compounds from pyrolysis have both received a lot of attention as potential solutions to these issues.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Aging Characterization of Pyro-Oil Modified Binders Using Fourier Transform Infrared Spectroscopy

Bhagat¹,

Hadole²,

Ranadive³

2023

Adv. Sci. Technol. Res. J.

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In order to obtain asphalt binder with enhanced quality to resist distresses like rutting, fatigue, and low-temperature cracking, there is a need to focus on asphalt binder modifi cation. The accumulation of plastic waste is a direct result of the daily rise in plastic demand. One of the eff ective and trending ways of reducing the impact of plastic waste on the environment is to pyrolyze it and use the oil obtained from it as fuel for power generation, heating, extraction of chemicals, or as an asphalt binder modifi er. This paper deals with the modifi cation of VG30 binder with pyro-oil obtained from High Density Polyethylene (HDPE) plastic waste, and analysing the eff ect of modifi cation on the short term aging of the binders. Pyro-oil is yielded from the pyrolysis process of HDPE at about 750 °C. The modifi ed binders were prepared by adding 1%, 2%, and 3% pyro-oil by total weight of VG30. The binders were short-term aged and the changes in their chemical functionalities before and after aging were evaluated using fourier transform infrared (FTIR) spectroscopy. Results of the FTIR test were used to calculate functional group indices for evaluating the aging characteristics of the modifi ed binders. It was observed that the pyro-oil interacts chemically with VG30 and binder chemistry is infl uenced by aging. It was also observed that, modifi cation with pyro-oil increases the resistance to aging of the binders.

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Perspectives on bio-oil recovery from plastic waste

Cited by 10 publications

References 45 publications

Optimization of combined mixture and process variables for the pyrolysis oil yield from co‐pyrolysis of polymeric wastes

Optimization of combined mixture and process variables for the pyrolysis oil yield from co‐pyrolysis of polymeric wastes

Challenges and Recent Advances in Enzyme-Mediated Wastewater Remediation—A Review

Oxidative Aging Characterization of Pyro-Oil Modified Binders Using Fourier Transform Infrared Spectroscopy

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