Characteristics of LDPE pyrolysis

Park, Kwinam; Park, Jin Won; Kim, Dong Chan

doi:10.1007/bf02699313

Cited by 48 publications

(40 citation statements)

References 9 publications

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“…Polyethylene is a major plastic component and was used as a feedstock for our experimental work. Oils produced from plastic pyrolysis have non-acidic, sulphur-free and non-corrosive characteristics, which is a major advantage of pyrolysis oils over fossil fuels and they can be used as feedstock in fluid catalytic cracking (FCC) refinery units [9,10]. Pyrolysis final products are affected by reaction parameters such as operating temperature, residence time, operating pressure, heating rate and catalysts [11].…”

Section: Introductionmentioning

confidence: 99%

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DC Thermal Plasma Design and Utilization for the Low Density Polyethylene to Diesel Oil Pyrolysis Reaction

Aboughaly

Stoute

2017

Energies

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Abstract:The exponential increase of plastic production produces 100 million tonnes of waste plastics annually which could be converted into hydrocarbon fuels in a thermal cracking process called pyrolysis. In this research work, a direct current (DC) thermal plasma circuit is designed and used for conversion of low density polyethylene (LDPE) into diesel oil in a laboratory scale pyrolysis reactor. The experimental setup uses a 270 W DC thermal plasma at operating temperatures in the range of 625 • C to 860 • C for a low density polyethylene (LDPE) pyrolysis reaction at pressure = −0.95, temperature = 550 • C with τ = 30 min at a constant heating rate of 7.8 • C/min. The experimental setup consists of a vacuum pump, closed system vessel, direct current (DC) plasma circuit, and a k-type thermocouple placed a few millimeters from the reactant sample. The hydrocarbon products are condensed to diesel oil and analyzed using flame ionization detector (FID) gas chromatography. The analysis shows 87.5% diesel oil, 1,4-dichlorobenzene (Surr), benzene, ethylbenzene and traces of toluene and xylene. The direct current (DC) thermal plasma achieves 56.9 wt. % of diesel range oil (DRO), 37.8 wt. % gaseous products and minimal tar production. The direct current (DC) thermal plasma shows reliability, better temperature control, and high thermal performance as well as the ability to work for long operation periods.

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Section: Introductionmentioning

confidence: 99%

“…As seen below, as the operating temperature increases, the residence time decreases due to the higher rate of thermal cracking [10]. The chosen residence time in the experimental work is 30 min since thermal plasma has the ability to achieve a temperature higher than 500 • C in that period.…”

Section: Introductionmentioning

confidence: 99%

DC Thermal Plasma Design and Utilization for the Low Density Polyethylene to Diesel Oil Pyrolysis Reaction

Aboughaly

Stoute

2017

Energies

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“…Studies on cellobiose hydrolysis into glucose can help understand the cleavage of the glycosidic bond. Cellobiose has been used as a model system in several hydrolysis studies [18][19][20]. The maximum yield of glucose was 36.8% at 320°C and 5076 psi in the subcritical water region [21].…”

Section: Introductionmentioning

confidence: 99%

Oxidative Hydrolysis of Cellobiose to Glucose

et al. 2011

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Cellobiose hydrolysis into glucose was chosen as a model system for cellulose breakdown to investigate glycosidic bond cleavage. The hydrolysis was enhanced by increased acidity in an inert gas medium, while air-assisted hydrolysis with a neutral solution achieved over 70% glucose yield. Hydrogen peroxide, as a stronger oxidant than air, converted cellobiose to carboxyl compounds, which lowered the glucose selectivity. At 150°C, the selectivity from cellobiose to glucose was very low on porous c-Al 2 O 3 supported catalysts, even lower than without a catalyst. When the active metals were prepared on non-porous supports such as spherical alumina (a phase), the overall yield of glucose was dramatically improved at 120°C. Similar improvements were obtained for another disaccharide model, sucrose, which achieved greater than 90% sucrose conversion with selectivity in excess of 90% at 80°C.

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“…A proper thermal treatment system not only resolves the disposal problems, but also recovers energy from these wastes. In the last few years, many efforts have been devoted to the development of a pyrolysis process for waste plastics [2][3][4][5][6][7]. But pyrolysis processes of waste plastics were never commercialized due to the lack of sufficient economic, environmental and political incentives as well as operation problems such as excessively long degradation time and the coking of reactants [8,9].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the thermal degradation of wax materials obtained from pyrolysis of mixed waste plastics

Lee

2010

Korean J. Chem. Eng.

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We did a kinetic analysis of the thermal degradation of wax materials obtained from pyrolysis of mixed waste plastics using the nonisothermal weight loss technique with heating rates of 10, 20, 30 and 40 o C/min. The weight loss data according to degradation temperature were analyzed by using the integral method based on Arrhenius form to obtain the kinetic parameters. To verify the effectiveness of the proposed kinetic analysis method, the experimental values were compared with those of the numerical integration results using kinetic parameters obtained in this work. It was found that the proposed kinetic analysis method gave reliable kinetic parameters of the thermal degradation of wax materials obtained from pyrolysis of mixed waste plastics.

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Characteristics of LDPE pyrolysis

Cited by 48 publications

References 9 publications

DC Thermal Plasma Design and Utilization for the Low Density Polyethylene to Diesel Oil Pyrolysis Reaction

DC Thermal Plasma Design and Utilization for the Low Density Polyethylene to Diesel Oil Pyrolysis Reaction

Oxidative Hydrolysis of Cellobiose to Glucose

Kinetics of the thermal degradation of wax materials obtained from pyrolysis of mixed waste plastics

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