Microwave assisted pyrolysis of expanded polystyrene waste using carbon black catalyst

Marco, Paula de; Poletto, Matheus

doi:10.33448/rsd-v11i11.34058

Cited by 3 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results shows that GO is an efficient catalyst to promote EPS depolymerization in low microwave exposition time. In a previous study, Marco and Poletto (2022) using the same apparatus, but with carbon black catalyst, obtained a gaseous fraction of approximately 54% using a exposure time three times higher.…”

Section: Microwave Assisted Pyrolysis Resultsmentioning

confidence: 94%

“…To avoid heat loss the quartz flask was insulated with mineral wool and all joins were sealed using Teflon tape. The experimental setup used in this work is based on a previously published work (Marco and Poletto, 2022).…”

Section: Microwave Assisted Pyrolysismentioning

confidence: 99%

“…However, this option requires peculiar conditions for obtained valuable products from EPS waste. The time and temperature are critical parameters, as well as the addition of additives or catalysts (Marco & Poletto, 2022). The usage of materials with high thermal conductivity in the microwave range promotes the EPS waste depolymerization.…”

Section: Introductionmentioning

confidence: 99%

“…The authors observed that the microwave conversion efficiency (68.1%) is high at high microwave power (600 W) and low susceptor quantity (50 g). Marco and Poletto (2022) evaluated the effect of using carbon black as a catalyst in EPS waste depolymerization using microwave-assisted pyrolysis at 400W for 12 min. Five different catalyst/polymer ratios (0.0125:1, 0.125:1, 0.25:1, 0.5:1, 1:1) were tested.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of using activated carbon and graphene oxide on the microwave assisted pyrolysis of expanded polystyrene waste

Zancanaro

Poletto²

2022

RSD

View full text Add to dashboard Cite

Polymers are increasingly present in everyday life to replace other materials. Because they are cheap and have attractive mechanical properties, they were and still are produced on a large scale and, consequently, their large volumes in landfills present a challenge for their recycling. Thus, the objective of this study was to evaluate the depolymerization of expanded polystyrene (EPS) waste through the use of microwaves using two agents that have carbon in their constitution to assist in depolymerization: graphene oxide (GO) and activated carbon (AC). Different amounts of GO and AC (0.125, 0.25, 0.5 g) were used, always keeping the mass of the EPS sample constant at 1 g. The tests in the microwave oven were performed in 3 cycles of 4 minutes each, with a total time of 12 minutes per batch. Inside the oven, the sample was placed inside a round-bottomed flask wrapped with rock wool. To characterize the material obtained from depolymerization, a mass balance was performed to evaluate the depolymerization yields associated with Fourier Transform Infrared Spectroscopy (FTIR) and thermogravimetric analysis (TGA). For the sample containing 0.125 g of GO, it was observed the formation of a larger solid fraction, little gaseous fraction and no liquid fraction. The sample with 0.25 g of GO showed the best yield of volatiles, with 22.58% of volatiles, and it was possible to observe both the liquid and the gaseous fractions. When AC catalyst was used the depolymerization extension was lower than GO. Samples containing with 0.125, 0.250 and 0.5 g of AC yielded gaseous fractions of 5.13; 9.16; and 3.06, respectively. In FTIR analysis it was not possible identify the formation of new bands for samples treated with GO or AC, when compared with EPS. Some new degradation peaks, when compared with EPS, were observed in TGA for samples that used GO as catalyst; which can be associated with the formation of more volatile compounds after depolymerization. The samples treated with AC showed a less pronounced reduction in its thermal stability. This study suggests that the heat transfer from the dark particle to the EPS sample is more effective when GO is used which may contribute to the depolymerization of EPS wastes.

show abstract

Section: Microwave Assisted Pyrolysis Resultsmentioning

confidence: 94%

Section: Microwave Assisted Pyrolysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of using activated carbon and graphene oxide on the microwave assisted pyrolysis of expanded polystyrene waste

Zancanaro

Poletto²

2022

RSD

View full text Add to dashboard Cite

show abstract

“…Going further, many researchers have made several attempts to use the pyrolysis processes in recycling the expanded polystyrene waste. de Marco, Poletto [53] attempted to depolymerize expanded polystyrene through microwaveassisted pyrolysis using a carbon black catalyst. Their studies revealed pyrolysis of expanded polystyrene at 400W in a fixed time of 12 minutes.…”

Section: Thermal Recyclingmentioning

confidence: 99%

A mini-review on expanded polystyrene waste recycling and its applications

Ugwu¹,

OBELE²

2023

World J. Adv. Eng. Technol. Sci.

View full text Add to dashboard Cite

Over the years, waste recycling has been a growing concern among many nations of the world, especially in developing countries. Expanded polystyrene (EPS) is used in electrical/electronic appliances as a shock absorber and constitutes a reasonable percentage of the entire plastic waste. There are three methods of recycling expanded polystyrene: mechanical, chemical, and thermal recycling; each of the above methods gives rise to different products that are used in different applications. Expanded polystyrene is used as a binder in emulsion paint as a replacement for conventional binders; as a component of asphalt used in road construction; as a component of wood plastic composites; as a blend with silica and in concrete to produce lightweight construction material. This article studied the various applications of recycled polystyrene waste from mechanical, chemical, and thermal methods of waste recycling.

show abstract

Co-pyrolytic investigation of waste bakelite with different thermoplastics using microwave and conventional batch pyrolysis reactor

Mahapatra,

Kisan,

Dash

et al. 2024

Sustainable Chemistry for the Environment

View full text Add to dashboard Cite

Microwave assisted pyrolysis of expanded polystyrene waste using carbon black catalyst

Cited by 3 publications

References 17 publications

Effect of using activated carbon and graphene oxide on the microwave assisted pyrolysis of expanded polystyrene waste

Effect of using activated carbon and graphene oxide on the microwave assisted pyrolysis of expanded polystyrene waste

A mini-review on expanded polystyrene waste recycling and its applications

Co-pyrolytic investigation of waste bakelite with different thermoplastics using microwave and conventional batch pyrolysis reactor

Contact Info

Product

Resources

About