LAPSE:2023.4576
Published Article
LAPSE:2023.4576
Thermal Treatment under Vacuum for Obtaining a Quenchant from Rapeseed Oil
February 23, 2023
Abstract
The aim of this study was to improve the quality of a vegetable oil, having in view its use as a quenchant for metallic parts in aircrafts. A process of pyrolysis under vacuum was applied to obtain a bio-oil with reduced viscosity and good quenching properties. Preliminarily, the rapeseed oil was fast pyrolyzed at temperature in the range of 300−375 °C and absolute pressure of 1 μbar. Some results such as viscosity and yields of bio-oil were obtained with a narrowing of the temperature range between 300−320 °C, for further processing. Quenching tests with bio-oils on stainless steel 25CD4 showed cooling curves closer to those of the standard mineral oil (Castrol IloquenchTM 1), by comparing them with unprocessed vegetable oil. The hardness of the steel after treatment rose from 29−30 HRC to 43−45 HRC, in accordance with requirements (35−45 HRC). Therefore, the conclusion is that bio-oils obtained by pyrolysis under vacuum are good quenchant proceeds from this study.
The aim of this study was to improve the quality of a vegetable oil, having in view its use as a quenchant for metallic parts in aircrafts. A process of pyrolysis under vacuum was applied to obtain a bio-oil with reduced viscosity and good quenching properties. Preliminarily, the rapeseed oil was fast pyrolyzed at temperature in the range of 300−375 °C and absolute pressure of 1 μbar. Some results such as viscosity and yields of bio-oil were obtained with a narrowing of the temperature range between 300−320 °C, for further processing. Quenching tests with bio-oils on stainless steel 25CD4 showed cooling curves closer to those of the standard mineral oil (Castrol IloquenchTM 1), by comparing them with unprocessed vegetable oil. The hardness of the steel after treatment rose from 29−30 HRC to 43−45 HRC, in accordance with requirements (35−45 HRC). Therefore, the conclusion is that bio-oils obtained by pyrolysis under vacuum are good quenchant proceeds from this study.
Record ID
Keywords
bio-oil, cooling curves, hardness, pyrolysis under vacuum, quenchant
Suggested Citation
Sivriu AM, Sapunaru OV, Sterpu AE, Cioroiu Tirpan DR, Chis TV, Dobre T. Thermal Treatment under Vacuum for Obtaining a Quenchant from Rapeseed Oil. (2023). LAPSE:2023.4576
Author Affiliations
Sivriu AM: Chemical and Biochemical Engineering Department, University “Politehnica” of Bucharest, 1-7 Gheorghe Polizu Str., 011061 Bucharest, Romania
Sapunaru OV: Chemical and Biochemical Engineering Department, University “Politehnica” of Bucharest, 1-7 Gheorghe Polizu Str., 011061 Bucharest, Romania; Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University [ORCID]
Sterpu AE: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania [ORCID]
Cioroiu Tirpan DR: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania
Chis TV: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania
Dobre T: Chemical and Biochemical Engineering Department, University “Politehnica” of Bucharest, 1-7 Gheorghe Polizu Str., 011061 Bucharest, Romania
Sapunaru OV: Chemical and Biochemical Engineering Department, University “Politehnica” of Bucharest, 1-7 Gheorghe Polizu Str., 011061 Bucharest, Romania; Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University [ORCID]
Sterpu AE: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania [ORCID]
Cioroiu Tirpan DR: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania
Chis TV: Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 124 Mamaia Blvd., 900527 Constanta, Romania
Dobre T: Chemical and Biochemical Engineering Department, University “Politehnica” of Bucharest, 1-7 Gheorghe Polizu Str., 011061 Bucharest, Romania
Journal Name
Processes
Volume
9
Issue
12
First Page
2189
Year
2021
Publication Date
2021-12-04
ISSN
2227-9717
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Original Submission
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PII: pr9122189, Publication Type: Journal Article
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LAPSE:2023.4576
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https://doi.org/10.3390/pr9122189
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Feb 23, 2023
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