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Research on Thermal Decomposition of Waste PE/PP

Monika Kuźnia Aneta Magdziarz
Chemical and Process Engineering | 2013 | No 1 March | 165-174 | DOI: 10.2478/cpe-2013-0014
Keywords plastic wastes supplemental fuel blast furnace process coking of coal
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Abstract

The most important and the most frequently used plastics are polyethylene (PE) and polypropylene (PP). They are characterised with high heating values (approximately 40 MJ/kg). Moreover, their chemical composition, based mainly on carbon and hydrogen, allows to use them in industrial processes. One of the methods of utilisation of plastic waste can be its use in the metallurgical industry. This paper presents results of thermal decomposition of waste PE/PP. Chemical and thermal analysis (TG) of studied wastes was carried out. Evolved gaseous products from the decomposition of wastes were indentified using mass spectrometry (TG-MS). This paper also presents an application of plastic wastes as supplemental fuel in blast furnace processes (as a substitute for coke) and as an addition in processes of coking coal.

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Authors and Affiliations

Monika Kuźnia
Aneta Magdziarz

Automated test bench for research on electrostatic separation in plastic recycling application

Roman Regulski Dorota Czarnecka-Komorowska Cezary Jędryczka Dariusz Sędziak Dominik Rybarczyk Krzysztof Netter Mariusz Barański Mateusz Barczewski
Bulletin of the Polish Academy of Sciences Technical Sciences | 2021 | 69 | 2 | e136719 | DOI: 10.24425/bpasts.2021.136719
Keywords recycling automotive plastics waste separation electrostatic separator
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Abstract

Many researchers in the developed countries have been intensively seeking effective methods of plastic recycling over the past years. Those techniques are necessary to protect our natural environment and save non-renewable resources. This paper presents the concept of an electrostatic separator designed as a test bench dedicated to the separation of mixed plastic waste from the automotive industry. According to the current policy of the European Union on the recycling process of the automotive industry, all these waste materials must be recycled further for re-entering into the life cycle (according to the circular economy). In this paper, the proposed concept and design of the test bench were offered the feasibility to conduct research and technological tests of the electrostatic separation process of mixed plastics. The designed test bench facilitated assessing the impact of positions of high-voltage electrodes, the value and polarity of the high voltage, the variable speed of feeders and drums, and also triboelectrification parameters (like time and intensity) on the process, among others. A specialized computer vision system has been proposed and developed to enable quick and reliable evaluation of the impact of process parameters on the efficiency of electrostatic separation. The preliminary results of the conducted tests indicated that the proposed innovative design of the research stand ensures high research potential, thanks to the high accuracy of mixed plastics in a short time. The results showed the significant impact of the corona electrode position and the value of the applied voltage on the separation process effectiveness. It can be concluded that the results confirmed the ability to determine optimally the values of the studied parameters, in terms of plastic separation effectiveness. This study showed that this concept of an electrostatic separator designed as a test bench dedicated for separation of mixed plastic waste can be widely applied in the recycling plastic industry.
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Authors and Affiliations

Roman Regulski
1
ORCID: ORCID
Dorota Czarnecka-Komorowska
2
ORCID: ORCID
Cezary Jędryczka
3
ORCID: ORCID
Dariusz Sędziak
1
ORCID: ORCID
Dominik Rybarczyk
1
ORCID: ORCID
Krzysztof Netter
1
ORCID: ORCID
Mariusz Barański
3
ORCID: ORCID
Mateusz Barczewski
2
ORCID: ORCID
  1. Institute of Mechanical Technology, Poznan University of Technology, 60-965 Poznań, Poland
  2. Institute of Materials Technology, Poznan University of Technology, 60-965 Poznań, Poland
  3. Institute of Electrical Engineering and Electronics, Poznan University of Technology, 60-965 Poznań, Poland

Characterization of geometrical parameters of plastic bottle shredder blade utilizing a two-step optimization method

Trieu Khoa Nguyen Minh Quang Chau The-Can Do Anh-Duc Pham
Archive of Mechanical Engineering | 2021 | vol. 68 | No 3 | 253-269 | DOI: 10.24425/ame.2021.138392
Keywords plastic waste shredder blade two-step optimization Taguchi method response surface method
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Abstract

In this paper, a numerical and experimental investigation of geometrical parameters of the blade for plastic bottle shredder was performed based on the Taguchi method in combination with a response surface method (RSM). Nowadays, plastic waste has become a major threat to the environment. Shredding, in which plastic waste is shredded into small bits, ready for transportation and further processing, is a crucial step in plastic recycling. Although many studies on plastic shredders were performed, there was still a need for more researches on the optimization of shredder blades. Hence, a numerical analysis was carried out to study the influences of the relevant geometrical parameters. Next, a two-step optimization process combining the Taguchi method and the RSM was utilized to define optimal parameters. The simulation results clearly confirmed that the current technique can triumph over the limitation of the Taguchi method, originated from a discrete optimization nature. The optimal blade was then fabricated and experimented, showing lower wear via measurement by an ICamScope® microscope. Hence, it can be clearly inferred from this investigation that the current optimization method is a simple, sufficient tool to be applied in such a traditional process without using any complicated algorithms or expensive software.
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Authors and Affiliations

Trieu Khoa Nguyen
1
ORCID: ORCID
Minh Quang Chau
1
ORCID: ORCID
The-Can Do
2
Anh-Duc Pham
2
ORCID: ORCID
  1. Faculty of Mechanical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam.
  2. Faculty of Mechanical Engineering, The University of Danang – University of Science and Technology, Da Nang City, Vietnam.

The Effect of Recycled High-Density Polyethylene (HDPE) as an Additional Binder in Porous Asphalt Pavement

L.A. Sofri D. Ganesan M.M. Al B. Abdullah Chee-Ming Chan M.H. Osman J. Garus S. Garus
Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 289-295 | DOI: 10.24425/amm.2024.147821
Keywords porous asphalt asphalt binde HDPE plastic waste Stability strength Marshall properties
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Abstract

Porous asphalt has excellent permeability and larger air voids. Due to the low stability strength of asphalt binder with aggregates, Malaysia uses porous asphalt roads for lightweight vehicle road transportation. Numerous studies indicate utilizing Recycled High-Density Polyethylene in porous asphalt road surface. As a result, it was utilised as an additional binder material to enhance the asphalt binder. The main purpose of this study is to investigate the stability of modified porous asphalt samples and evaluate the optimum percentage of HDPE plastic waste from 3%, 6% and 9%. The aggregates, asphalt properties, Marshall Parameters and waster absorption test are in comply with JKR Standard and PWD 2008. At 3% of plastic addition has improved the stability of porous asphalt specimens. Adding plastic waste as a binder helps strengthen asphalt binding.
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Authors and Affiliations

L.A. Sofri
1
ORCID: ORCID
D. Ganesan
2
ORCID: ORCID
M.M. Al B. Abdullah
3
ORCID: ORCID
Chee-Ming Chan
4
ORCID: ORCID
M.H. Osman
4
ORCID: ORCID
J. Garus
5
ORCID: ORCID
S. Garus
5
ORCID: ORCID
  1. Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia; Universiti Malaysia Perlis (UniMAP), Centre of Excellence Geopolymer and Green Technology, (CEGeoGTech), 01000 Perlis, Malaysia
  2. Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia
  3. Universiti Malaysia Perlis (UniMAP), Centre of Excellence Geopolymer and Green Technology, (CEGeoGTech), 01000 Perlis, Malaysia; Universiti Malaysia Perlis (UniMAP), Fac ult y of Chemical Engineering and Technology, 01000 Perlis, Malaysia
  4. Universiti Tun Hussein Onn, Fac ult y of Engineering Technology, Pagoh, Johor, Malaysia
  5. Częstochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, Department of Mechanics and Fu ndamentals of Machinery Design, 73 Dąbrowskiego Av., 42-201 Częstochowa, Poland

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