Oil Quality and By-product Yield Characteristics Based on Pre-treatment of Waste Plastics in Pyrolysis Process

2019 ◽  
Vol 36 (04) ◽  
pp. 354-360
Author(s):  
Han-Sol Yang ◽  
Jae-Hyuk Hyun ◽  
Chae-Wook Lim ◽  
Ki-Kwang Kim
Keyword(s):  
Oil Quality ◽  
Product Yield ◽  
Waste Plastics ◽  
Pyrolysis Process ◽  
Pre Treatment

Interaction between feedstocks, absorbers and catalysts in the microwave pyrolysis process of waste plastics

2021 ◽  
Vol 291 ◽  
pp. 125857
Author(s):  
Xiaodong Jing ◽  
Junqian Dong ◽  
Hanlin Huang ◽  
Yanxi Deng ◽  
Hao Wen ◽  
...  
Keyword(s):  
Waste Plastics ◽  
Pyrolysis Process ◽  
Microwave Pyrolysis

scholarly journals Migration of Sulfur and Nitrogen in the Pyrolysis Products of Waste and Contaminated Plastics

2021 ◽  
Vol 11 (10) ◽  
pp. 4374
Author(s):  
Waldemar Ścierski
Keyword(s):  
Circular Economy ◽  
Physicochemical Parameters ◽  
Literature Analysis ◽  
Waste Plastics ◽  
Pyrolysis Process ◽  
Pyrolysis Products ◽  
Plastics Recycling ◽  
A Value ◽  
Mixed Waste ◽  
Pyrolytic Oil

The most advantageous way of managing plastics, according to circular economy assumptions, is recycling, i.e., reusing them. There are three types of plastics recycling: mechanical, chemical and energy recycling. The products of the pyrolysis process can be used for both chemical and energy recycling. Possibilities of further use of pyrolysis products depend on their physicochemical parameters. Getting to know these parameters was the aim of the research, some of which are presented in this article. The paper presents the research position for conducting the pyrolysis process and discusses the results of research on pyrolysis products of waste plastics. The process was conducted to obtain the temperature of 425 °C in the pyrolytic chamber. Such a value was chosen on the basis of my own previous research and literature analysis. The focus was on the migration of sulfur and nitrogen, as in some processes these substances may pose a certain problem. Studies have shown high possibilities of migration of these elements in products of pyrolysis process. It has been shown that the migration of sulfur is similar in the case of homogeneous and mixed waste plastics—it immobilizes mainly in pyrolytic oil. Different results were obtained for nitrogen. For homogeneous plastics, nitrogen immobilizes mainly in char and oil, whereas for mixed plastics, nitrogen immobilizes in pyrolytic gas.

Physical, chemical, thermal and biological pre-treatment technologies in fast pyrolysis to maximize bio-oil quality: A critical review

2019 ◽  
Vol 128 ◽  
pp. 105333 ◽  
Author(s):  
Brenda J. Alvarez-Chavez ◽  
Stéphane Godbout ◽  
Joahnn H. Palacios-Rios ◽  
Étienne Le Roux ◽  
Vijaya Raghavan
Keyword(s):  
Critical Review ◽  
Oil Quality ◽  
Fast Pyrolysis ◽  
Physical Chemical ◽  
Bio Oil ◽  
Treatment Technologies ◽  
Pre Treatment

scholarly journals Regeneration of used engine lubricating oil by solvent extraction

2012 ◽  
Vol 23 (2) ◽  
pp. 149-154
Author(s):  
Ancaelena-Eliza Sterpu ◽  
Anca Iuliana Dumitru ◽  
Mihai-Florinel Popa
Keyword(s):  
Solvent Extraction ◽  
Oil Recovery ◽  
Vacuum Distillation ◽  
Product Yield ◽  
Lubricating Oil ◽  
Lubricating Oils ◽  
Extraction Solvent ◽  
Used Oil ◽  
Incomplete Removal ◽  
Pre Treatment

AbstractHuge amounts of used lubricating oils from automotive sources are disposed of as a harmful waste into the environment. For this reason, means to recover and reuse these wastes need to be found. Problems arising from acid treatment include environmental problems associated with the disposal of acid sludge and spent earth, low product yield (45-65%) and incomplete removal of metals. The processes of re-refining of used lubricating oils depend greatly on the nature of the oil base stock and on the nature and amount of contaminants in the lubricant resulting from operations. The study was carried out on a sample of 15W40 type used oil collected from one automobile. The re-refining process of used oil consists of dehydration, solvent extraction, solvent stripping and vacuum distillation. This study aims to investigate a process of solvent extraction of an alcohol-ketone mixture as a pre-treatment step followed by vacuum distillation at 5 mmHg. The primary step was conducted before the solvent extraction that involves dehydration to remove the water and fuel contaminants from the used oil by vacuum distillation. The solvent extraction and vacuum distillation steps were used to remove higher molecular weight contaminants. The investigated solvent to oil ratios were 2, 3, 4, 5 and 6. The solvent composition is 25% 2-propanol, 50% 1- butanol and 25% butanone or methyl ethyl ketone (MEK). The percentage of oil recovery for the solvent to oil ratio of 6:1 is further improved, but for the ratio values higher than 6:1, operation was considered economically not feasible. Finally, the re-refined oil properties were compared with the commercial virgin lubricating oil properties.

scholarly journals Effects of processing techniques on oxidative stability of Prunus pedunculatus seed oil

2017 ◽  
Vol 68 (3) ◽  
pp. 204
Author(s):  
J. Yan ◽  
M. M. Guo ◽  
Y. H. Shen ◽  
Y. Y. Wang ◽  
X. Luan ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Oxidative Stability ◽  
Seed Oil ◽  
Color Change ◽  
Fatty Acid Content ◽  
Oil Quality ◽  
Thiobarbituric Acid ◽  
Conjugated Diene ◽  
Pre Treatment ◽  
Processing Techniques

This paper investigated the effects of Prunus pedunculatus (P. pedunculatus) seed pre-treatment, including microwaving (M), roasting (R), steaming (S) and roasting plus steaming (RS) on crude oil quality in terms of yield, color change, fatty acid composition, and oxidative stability. The results showed an increase in monounsaturated fatty acid content and oxidative stability of the oils obtained from different processing treatments compared to the oil obtained from raw seeds (RW) without processing. The oils, obtained from pretreated seeds, had higher conjugated diene (CD) and 2-thiobarbituric acid (2-TBA) values, compared to that obtained from RW when stored in a Schaal oven at 65 °C for 168 h. However, polyphenol and tocopherol contents decreased in all oil samples, processed or unprocessed. The effect of pre-treating the seeds was more prominent in the oil sample obtained through the RS technique, and showed higher oxidative stability than the other processed oils and the oil from RW.

scholarly journals Accelerate the Aging of Polymer as Energy-Saving Method Prior to the Pyrolysis Process

2021 ◽  
Author(s):  
Jin Hu
Keyword(s):  
Energy Consumption ◽  
Accelerated Aging ◽  
High Energy ◽  
High Irradiance ◽  
Waste Plastics ◽  
Pyrolysis Process ◽  
Long Time ◽  
Speed Up ◽  
Further Development ◽  
High Energy Consumption

Pyrolysis technology has appeared a long time ago, but it has not been widely recognized and used in the area of waste plastic/rubber management. The key reason is that the high energy consumption of pyrolysis is the most important problem that plagues the further development of pyrolysis. Prior to the pyrolysis of waste plastics/rubbers, in addition to dehydration and drying can save part of the energy consumption of pyrolysis, in this study, we have first reviewed and discussed high irradiance exposure to artificially accelerate the aging process of waste plastics/rubbers as pretreatment. The results from our preliminary experiments show that the pyrolysis process of the plastic that has undergone UV accelerated aging was speed up, accordingly to achieve saving energy in thermal cracking.

scholarly journals Pyrolysis and Kinetic Analysis of CO2 Fixation Marine (Isochrysis sp.) and Freshwater (Monoraphidium c.) Microalgae

2021 ◽  
Author(s):  
Noridah B. Osman ◽  
Umi Syahirah Binti Mohd Amina ◽  
David Onoja Patrick ◽  
Nurul Asyikin Binti Bad ir Noon Zamana ◽  
Syazmi Zul Arif n Hakimi Saado ◽  
...  
Keyword(s):  
Co2 Fixation ◽  
Fixed Bed ◽  
Product Yield ◽  
Marine Species ◽  
Pyrolysis Process ◽  
Heating Rates ◽  
Nitrogen Flow Rate ◽  
Freshwater Microalgae ◽  
Thermogravimetric Analyzer ◽  
Bio Oil

Abstract Marine and freshwater microalgae grow in two different ecosystems, which influence their properties thus requires attention prior to determining its application. This paper has successfully disclosed the thermal, chemical, and physical properties of two types of microalgae on carbon dioxide (CO2) fixation and underwent pyrolysis process. Slow pyrolysis process for marine and freshwater microalgae (Isochrysis sp. and Monoraphidium c.) was performed in the fixed bed pyrolysis reactor and TGA (thermogravimetric analyzer) to determine the product yield and study their thermal decomposition profile. The pyrolysis was completed at various temperatures (400, 450, 500, and 550°C) at a heating rate of 15 °Cmin-1 and nitrogen flow rate of 200 ml min-1. Pyrolysis in TGA analyzer ran from 27 to 800°C at three heating rates (10, 20, and 40 °Cmin-1). For chemical composition, Fourier-transform Infrared (FTIR) analysis was performed on both microalgae samples. The highest yield (up to 33.9%) of bio-oil was obtained from Isochrysis sp. for all temperatures while the highest average yield (65.78%) of bio-char was collected from Monoraphidium c. species. From TGA pyrolysis, the major decomposition occurred between 200-400°C for Monoraphidium c. species. On the other hand, the decomposition profile of Isochrysis sp. was slightly slower, which may be due to the differences in lipid composition (FTIR peak 2929 cm-1). The activation energy of all tests is lower (33.6-40.3 kJ mol-1) compared to several other biomasses. Marine species fixed with CO2 showed promising results even without addition of catalyst and no additional cost needed.

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