Study on the reusability of kaolin as catalysts for catalytic pyrolysis of low-density polyethylene

Fuel ◽  
2021 ◽  
Vol 302 ◽  
pp. 121164
Author(s):  
Wei Luo ◽  
Zhongyi Fan ◽  
Jun Wan ◽  
Qing Hu ◽  
Hang Dong ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Low Density Polyethylene ◽  
Low Density

Application of highly stable biochar catalysts for efficient pyrolysis of plastics: a readily accessible potential solution to a global waste crisis

2020 ◽  
Vol 4 (9) ◽  
pp. 4614-4624
Author(s):  
Chenxi Wang ◽  
Hanwu Lei ◽  
Moriko Qian ◽  
Erguang Huo ◽  
Yunfeng Zhao ◽  
...  
Keyword(s):  
Corn Stover ◽  
Catalytic Pyrolysis ◽  
Douglas Fir ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Waste Plastics ◽  
Potential Solution

Biochar catalysts derived from corn stover and Douglas fir were employed for the catalytic pyrolysis of model low-density polyethylene (LDPE) and real waste plastics.

Catalytic Pyrolysis of Low-Density Polyethylene over Alumina-Supported Noble Metal Catalysts

2010 ◽  
Vol 24 (8) ◽  
pp. 4231-4240 ◽  
Author(s):  
Nagi Insura ◽  
Jude A. Onwudili ◽  
Paul T. Williams
Keyword(s):  
Noble Metal ◽  
Catalytic Pyrolysis ◽  
Metal Catalysts ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Noble Metal Catalysts

scholarly journals Catalytic Pyrolysis of Low Density Polyethylene Using Cetyltrimethyl Ammonium Encapsulated Monovacant Keggin UnitsC19H42N4H3(PW11O39)and ZSM-5

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Madeeha Batool ◽  
Asma Tufail Shah ◽  
Muhammad Imran Din ◽  
Baoshan Li
Keyword(s):  
High Temperature ◽  
Thermal Degradation ◽  
Catalytic Cracking ◽  
Catalytic Pyrolysis ◽  
Batch Reactor ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Hydrophobic Nature ◽  
Cetyltrimethyl Ammonium

The effect of the catalysts on the pyrolysis of commercial low density polyethylene (LDPE) has been studied in a batch reactor. The thermal catalytic cracking of the LDPE has been done using cetyltrimethyl ammonium encapsulated monovacant keggin units (C19H42N)4H3(PW11O39), labeled as CTA-POM and compared with the ZSM-5 catalyst. GC-MS results showed that catalytic cracking of LDPE beads generated oilier fraction over CTA-POM as compared to ZSM-5. Thus, the use of CTA-POM is more significant because it yields more useful fraction. It was also found that the temperature required for the thermal degradation of LDPE was lower when CTA-POM was used as a catalyst while high temperature was required for degradation over ZSM-5 catalyst. Better activity of CTA-POM was due to hydrophobic nature of CTA moiety which helps in catalyst mobility and increases its interaction with hydrocarbons.

scholarly journals Experimental Study of Thermal and Catalytic Pyrolysis of Plastic Waste Components

2018 ◽  
Author(s):  
Azubuike Francis Anene ◽  
Siw Bodil Fredriksen ◽  
Kai Arne Sætre ◽  
Lars -Andre Tokheim
Keyword(s):  
High Density Polyethylene ◽  
Catalytic Pyrolysis ◽  
Batch Reactor ◽  
Decomposition Temperature ◽  
Nitrogen Atmosphere ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Waste Plastics ◽  
Pp Blends ◽  
Hydrocarbon Distribution

Thermal and catalytic pyrolysis of virgin low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP) and mixtures of LDPE/PP were carried out in a 200 ml laboratory scale batch reactor at 460 °C in a nitrogen atmosphere. Thermogravimetric analysis (TGA) was carried out to study the thermal and catalytic degradation of the polymers at a heating rate of 10 °C/min. The amount of PP was varied in the LDPE/PP mixture to explore its effect on the reaction. In thermal degradation (TGA) of LDPE/PP blends, a lower decomposition temperature was observed for LDPE/PP mixtures compared to pure LDPE, indicating interaction between the two polymer types. In the presence of a catalyst (CAT-2), the degradation temperatures for the pure polymers were reduced. The TGA results were validated in a batch reactor using PP and LDPE respectively. Thermal cracking results showed that the oil product contains a significant amount of gasoline (C7 − C12) and diesel (C13 − C20) hydrocarbon fractions. The catalyst enhanced cracking at lower temperatures and narrowed the hydrocarbon distribution in the oil towards the gasoline range fraction (C7 – C12). The result suggests that the oil produced from catalytic pyrolysis of waste plastics has a potential as an alternative fuel.

scholarly journals Waste-to-Fuels: Pyrolysis of Low-Density Polyethylene Waste in the Presence of H-ZSM-11

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1198
Author(s):  
Nahyeon Lee ◽  
Junghee Joo ◽  
Kun-Yi Andrew Lin ◽  
Jechan Lee
Keyword(s):  
Catalytic Pyrolysis ◽  
Pyrolysis Temperature ◽  
Jet Fuel ◽  
Aliphatic Hydrocarbons ◽  
Low Density Polyethylene ◽  
Low Molecular Weight ◽  
Low Density ◽  
Motor Oil ◽  
Waste Valorization ◽  
Gaseous Hydrocarbon

Herein, the pyrolysis of low-density polyethylene (LDPE) scrap in the presence of a H-ZSM-11 zeolite was conducted as an effort to valorize plastic waste to fuel-range chemicals. The LDPE-derived pyrolytic gas was composed of low-molecular-weight aliphatic hydrocarbons (e.g., methane, ethane, propane, ethylene, and propylene) and hydrogen. An increase in pyrolysis temperature led to increasing the gaseous hydrocarbon yields for the pyrolysis of LDPE. Using the H-ZSM-11 catalyst in the pyrolysis of LDPE greatly enhanced the content of propylene in the pyrolytic gas because of promoted dehydrogenation of propane formed during the pyrolysis. Apart from the light aliphatic hydrocarbons, jet fuel-, diesel-, and motor oil-range hydrocarbons were found in the pyrolytic liquid for the non-catalytic and catalytic pyrolysis. The change in pyrolysis temperature for the catalytic pyrolysis affected the hydrocarbon compositions of the pyrolytic liquid more materially than for the non-catalytic pyrolysis. This study experimentally showed that H-ZSM-11 can be effective at producing fuel-range hydrocarbons from LDPE waste through pyrolysis. The results would contribute to the development of waste valorization process via plastic upcycling.

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