Central composite design methodology has been employed to model the sludge yield data obtained during liquid-liquid extractive rerefining of spent lubricants using an alcohol (1-butanol) and a ketone (methyl ethyl ketone) as prospective solvents. The study has resulted in two reasonably accurate multivariate process models that relate the sludge yield (R (2) = 0.9065 and 0.9072 for alcohol and ketone, resp.) to process variables (settling time t, operating temperature T, and oil to solvent ratio r). Construction of such models has allowed the maximization of the sludge yield (more than 8% and 3% in case of alcohol and ketone, resp.) so that the extraction of useable oil components from spent lubricants can economically be performed under extremely mild conditions (t = 16.7 h, T = 10°C, and r = 2) and fairly moderate conditions (t = 26.6 h, T = 10°C, and r = 5) established for the alcohol and ketone correspondingly. Based on these performance parameters alcohol appears to be superior over ketone for this extraction process. Additionally extractive treatment results in oil stocks with lesser quantity of environmentally hazardous polyaromatic hydrocarbons that are largely left in the separated sludge.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3944650 | PMC |
| http://dx.doi.org/10.1155/2014/458789 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Advancing sustainable lubricating oil management: Re-refining techniques, market insights, innovative enhancements, and conversion to fuel.
Heliyon
October 2024
Department of Mechanical Engineering, Chittagong University of Engineering and Technology, Chattogram, 4349, Bangladesh.
Lubricating oil disposal is considered hazardous waste and has adverse effects on the environment and human health. It is crucial to implement tight measures to regulate and minimize these impacts, or explore opportunities for oil regeneration. The paper offers an extensive review of worldwide demand for lubricating oil and its market share, with a specific emphasis on the viewpoint of Bangladesh.
View Article and Find Full Text PDFClean-up of wastewater discharged from zinc industry through application of zeolite 4A produced from a waste contaminated by lubricant oil components.
J Hazard Mater
December 2024
Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran.
The zeolite 4 A powders were sustainably derived from clay-based waste contaminated with the spent lubricant oil. Then, the products were used to treat the wastewater discharged from a local zinc industry. The main challenge is removal of toxic organic components from the waste and conversion of obtained precursor to the zeolite structure, simultaneously.
View Article and Find Full Text PDFImpact of Interactions with a Puppy and Handler Versus a Handler Alone on Stress and Vitality in a University Setting: A Crossover Study.
Animals (Basel)
August 2024
School of Psychology and Public Health, La Trobe University, Bundoora VIC 3086 and Bendigo VIC 3552, Australia.
Article Synopsis
- Interacting with puppies significantly boosts vitality and reduces stress among university staff and students compared to interactions with just a handler.
- A study involved 32 participants engaging with a puppy in a crossover design, revealing that the puppy's presence had a stronger positive impact on their wellbeing.
- These findings suggest that incorporating puppies into campus wellbeing programs could enhance their effectiveness, especially since some puppies may already be present for training purposes.
Toxicological evaluation of copper oxide nanoparticles following their intraperitoneal injection to Wistar rats.
Toxicol Res (Camb)
August 2024
Institute of Zoology, Bahauddin Zakariya University, Multan 60800, Pakistan.
Background: Copper oxide (CuO) nanoparticles (CO NPs) are in extensive use during our everyday life as antimicrobial agent, lubricant, in manufacturing electrodes of lithium ion batteries as well as for photo catalytic degradation of organic pollutants. Due to extensive and diverse use CuO NPs, they are likely to accumulate in the environment and to affect the live forms. Present investigation was aimed to report the biocompatibility of CO NPs in Wistar rats in sex specific manner.
View Article and Find Full Text PDFOne-stone, two birds: One step regeneration of discarded copper foil in zinc battery for dendrite-free lithium deposition current collector.
J Colloid Interface Sci
August 2024
Automotive Engineering Research Institute, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, People's Republic of China. Electronic address:
The ever-growing requirement for electrochemical energy storage has exacerbated the production of spent batteries, and the recycling of valuable battery components has recently received a remarkable attention. Among all battery components, copper foil is widely utilized as a current collector for stable zinc platting and stripping in zinc metal batteries (ZMBs) due to the perfect lattice matching of between metal copper and zinc, which is accompanied by the formation of multiple copper-zinc alloy components during the cycling process. Herein, a novel "two birds with one-stone" strategy through a one simple heat treatment step to revive the discarded copper foil in zinc metal battery is reported to further obtain a lithiophilic current collector (CuZn-Cu) with multiple copper-zinc alloy components on the surface of the discarded copper foil.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!