Effective utilization and evaluation of waste plastic pyrolysis oil in a low heat rejection single cylinder diesel engine

Padmanabhan, S.; Venu, Harish; Narayanaperumal, Balan Kuttinadar

doi:10.1080/15567036.2020.1803453

Cited by 17 publications

(5 citation statements)

References 45 publications

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“…The selectivity of diesel-like fraction increased dramatically with the increased reaction temperature from 400 to 450 °C and decreased when temperature increased more than 450 °C because the thermal degradation of both LDPE and SLO at higher temperatures played an extreme role in accelerating the thermal degradation of LDPE, ,,,− which resulted in the production of hydrogen radical and hydrocarbon radicals. Then, the rearrangement of both H-radical and hydrocarbon occurred to generate small amounts of hydrogen gas and hydrocarbon gas products, , resulting in an enhanced hydrogen atmosphere in the catalytic reaction, which promoted the hydrogenation reaction coupled with H-transfer and β-scission of long-chain hydrocarbon compound into light alkane during the catalyst pyrolysis reaction.…”

Section: Resultsmentioning

confidence: 99%

“…The physicochemical analyses showed that the properties of pyrolysis oil were also quite similar and met the standard requirements of diesel grade. 19 , 20 , 29 Therefore, it is a beneficial alternative way to convert waste lubricant oil from the garage via catalytic pyrolysis into diesel-like oil, while the catalytic pyrolysis of SLO with blended waste LDPE could be a successive process of both quantitative and qualitative production of alternative fuels 4 , 14 , 29 , 30 and enhance attraction to the circular economy in several countries.…”

Section: Resultsmentioning

confidence: 99%

“…However, one major limitation of microporous catalysts is often limiting the catalytic activity and further catalytic efficiency for a large hydrocarbon compound according to intracrystalline diffusion, resulting in obstacles to the cracking reaction, isomerization, and arrangement of large hydrocarbon molecules into smaller hydrocarbon compounds at similar fractions to naphtha kerosene or diesel. − , Consequently, the modification of zeolite with metal doping has attracted much attention to improving both the acid strength and catalytic activity of the cracking reaction, − which might favor a higher yield of shortened hydrocarbon compounds that also effectively improve the catalytic oil to meet the stringent standard properties for diesel-like products in commercialized transport fuels. ,,,− Therefore, plastic waste entails dumping it at landfills, which can lead to numerous environmental pollution. The disposal of spent lubricant oil is collected and burned to produce heat energy, whose potential can be converted into energy by thermochemical reaction.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Charusiri,

Phowan,

Permpoonwiwat

et al. 2023

ACS Omega

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This work provided catalytic copyrolysis of spent lubricating oil (SLO) with waste low-density polyethylene (LDPE) using copper modification of a spent fluid catalytic cracking (sFCC) catalyst to produce diesel-like fuels in a microbatch reactor, which will lead to effective waste management, ensure sustainability, and serve as an alternative energy source. The effects of LDPE blended with SLO, temperature, reaction time, and catalyst loading using an inert nitrogen atmosphere were investigated on the yields and distributions of copyrolyzed oil, while metal modification of the sFCC was prepared and used to investigate the catalytic activity. The temperature and time of reaction played an important role in the gaseous contribution to the pyrolysis of SLO. The addition of the LDPE ratio in the catalytic copyrolysis, including Cu loading on a spent FCC template, also enhanced the acidity and was responsible for the catalytic activity, which could improve the product distribution and chemical compounds in a range of diesel-like fuels. It was shown that the pyrolyzed oil was in the range of C7–C26 with a maximum diesel-like fraction of 23.11 ± 2.88 wt % compared with the catalytic pyrolysis of SLO alone, which contained a diesel-like fraction of only 12.45 ± 1.92 wt %. It was noticed that the acid active site of the catalyst resulted in a carbon–carbon bond cleavage and further secondary reaction, leading to the conversion of the long residue fraction into a light oil product. In addition, the LDPE ratio in the catalytic copyrolysis could improve the product distribution and chemical compounds in a range of diesel-like compounds, as confirmed by the GC/MS analysis. Catalytic copyrolysis oil of the optimal process condition (0.7:0.3 mass molar of SLO/LDPE, 450 °C, 60 min, 3 wt % Cu-sFCC, and 10 wt % catalyst loading) mainly contains light hydrocarbons in the C7–C19 range. Accordingly, both the product selectivity and the conversion of the long residue to the diesel-like fraction were nearly stable (59.01 ± 1.36%) during the catalyst reusability test from one to three cycles without regeneration and significantly decreased after the fifth cycle. This is an indication that the copyrolysis enhanced the conversion of SLO by LPDE blended into smaller hydrocarbon compounds, and the catalytic activity therefore showed a major tendency toward the formation of diesel-like fractions (C8–C18).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Charusiri,

Phowan,

Permpoonwiwat

et al. 2023

ACS Omega

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“…Much effort was put forth to pyrolysis to convert waste plastic to fuels as an alternative method from fossil fuels. − Specifically, aromatic compounds represent a critical category of bulk chemicals extensively utilized in the synthesis of polymers, including but not limited to polystyrene, phenolic resins, nylon, polyethylene glycol terephthalate, polycarbonates, various resins, and films. The global demand for these aromatics compounds has been exhibiting a consistent upward trend on an annual basis .…”

Section: Introductionmentioning

confidence: 99%

Microwave Catalytic Co-Upcycling of Polyethylene and Polystyrene

Luong,

Luo,

Robinson

et al. 2024

ACS Sustainable Resour. Manage.

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Microwave-assisted catalytic upcycling plastic wastes into valuable chemicals is a promising technology to treat plastic wastes. In this study, the catalytic upcycling of low-density polyethylene (LDPE), polystyrene (PS), and their mixture under microwave (MW) irradiation was explored. In comparison to conventional thermal conditions, MW heating produced significantly more BTX and achieved better conversion due to the "hotspots" formation over a catalyst. MW irradiation also lowered the activation energy for the catalytic pyrolysis of pure and mixed plastics. For mixed plastics, the E a was reduced to 20.3 kJ/mol at MW conditions compared to 38.3 kJ/mol in conventional thermal heating. The synergistic mechanism between LDPE and PS for BTX production was proposed, in which aromatization occurred within the HZSM-5 channel and the presence of LDPE inhibited coking while PS provided the backbone for BTX formation.

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“…With the advent of advanced ceramics technology, one of the methods to improve engine efficiency is via structural alterations. These coatings were first used on gas turbines and aeronautical engines [3]. Improved ceramic coatings may improve engine performance and reduce emissions by reducing heat rejection from the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

Multiparametric Optimization on Influence of Ethanol and Biodiesel Blends on Nanocoated Engine by Full Factorial Design

Venkatesh

Latchoumi

Babu³

et al. 2022

Journal of Nanomaterials

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Energy conservation and management have become critical industrial activities, since energy expenses account for a significant portion of production costs. This proactive strategy has had an effect on worldwide energy consumption trends. Integration of thermal barrier coatings into engine design is necessary to solve efficiency concerns, and this coating technology has the potential to increase engine power while lowering specific fuel consumption. In a similar line, biodiesel has been presented as a possible substitute to diesel since it is nontoxic and sourced from renewable energy sources. The present study aims to enhance the performance of a diesel engine via the use of a thermal barrier-coated piston that works on biodiesel mixes. Due to its outstanding thermal insulation qualities, yttria-stabilized zirconia is the preferred material for thermal barrier coatings. Brake thermal efficiency for B20E15 is about 4% better than diesel and for B20E05 and B20E15 is about 4.6% and 13.5% less fuel consumption. CO and HC emissions were reduced by 6% to 8% on average with the B20 blends. Biodiesel blends were compared to pure diesel in terms of performance and emissions, and the blend ratio was improved using a design of experiment tool.

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Effective utilization and evaluation of waste plastic pyrolysis oil in a low heat rejection single cylinder diesel engine

Cited by 17 publications

References 45 publications

Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Microwave Catalytic Co-Upcycling of Polyethylene and Polystyrene

Multiparametric Optimization on Influence of Ethanol and Biodiesel Blends on Nanocoated Engine by Full Factorial Design

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