scholarly journals Extraction of Astaxanthin and Lutein from Microalga Haematococcus pluvialis in the Red Phase Using CO2 Supercritical Fluid Extraction Technology with Ethanol as Co-Solvent

Marine Drugs ◽  
2018 ◽  
Vol 16 (11) ◽  
pp. 432 ◽  
Author(s):  
Antonio Molino ◽  
Sanjeet Mehariya ◽  
Angela Iovine ◽  
Vincenzo Larocca ◽  
Giuseppe Di Sanzo ◽  
...  
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Haematococcus Pluvialis ◽  
Dry Weight ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Experimental Activity ◽  
Extracting Solvent ◽  
Scale Reactor ◽  
Microalgal Species

Astaxanthin and lutein, antioxidants used in nutraceutics and cosmetics, can be extracted from several microalgal species. In this work, investigations on astaxanthin and lutein extraction from Haematococcus pluvialis (H. pluvialis) in the red phase were carried out by means of the supercritical fluid extraction (SFE) technique, in which CO2 supercritical fluid was used as the extracting solvent with ethanol as the co-solvent. The experimental activity was performed using a bench-scale reactor in semi-batch configuration with varying extraction times (20, 40, 60, and 80 min), temperatures (50, 65, and 80 °C) and pressures (100, 400, and 550 bar). Moreover, the performance of CO2 SFE with ethanol was compared to that without ethanol. The results show that the highest astaxanthin and lutein recoveries were found at 65 °C and 550 bar, with ~18.5 mg/g dry weight (~92%) astaxanthin and ~7.15 mg/g dry weight (~93%) lutein. The highest astaxanthin purity and the highest lutein purity were found at 80 °C and 400 bar, and at 65 °C and 550 bar, respectively.

Extraction of Actinides and Lanthanides by Supercritical Fluid

2010 ◽  
Vol 133 (5) ◽  
Author(s):  
Liyang Zhu ◽  
Wuhua Duan ◽  
Jingming Xu ◽  
Yongjun Zhu
Keyword(s):  
Waste Management ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Nuclear Waste ◽  
Industrial Application ◽  
Chemical Engineering ◽  
Liquid Waste ◽  
Nuclear Waste Management ◽  
Fluid Extraction ◽  
Extraction Technology

Reprocessing of used nuclear fuel and nuclear waste management are important issues for the sustainable development of nuclear energy. It is necessary to develop novel nuclear waste treatment technologies to meet the goal of minimizing the secondary liquid waste. Supercritical fluids are considered green solvents in chemical engineering process. Moreover, extraction of metal ions by supercritical fluid is achieved. It gains growing interest to treat nuclear waste using supercritical fluid extraction recently because it can greatly decrease the secondary liquid waste with high radioactivity. During the past 2 decades, extraction of actinides and lanthanides by supercritical fluid has been intensively studied in many countries, and many important progresses have been made. However, the prospect of industrial application of supercritical fluid extraction technology in nuclear waste management is still unclear. In this paper, extraction of actinides and lanthanides from various matrices or from their oxides by supercritical fluid including the experimental results, extraction mechanism, and kinetic process was reviewed. The engineering demonstration projects were introduced. The trend of industrial application of supercritical fluid extraction technology in nuclear waste management was also discussed.

A Review of Supercritical Fluid Extraction Technology and Application

2014 ◽  
Vol 69 (6) ◽  
Author(s):  
Fabio Marchetto ◽  
Azhar Abdul Aziz
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Industrial Application ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Great Opportunity ◽  
Natural Tendency ◽  
Major Application ◽  
Residual Processing

The supercritical fluid extraction (SFE) technology was firstly documented on 1822. In this review paper, the authors contemplated the inhibiting factors that resulted in limited industrial application and analysis using SFE. The driving trend nowadays is to apply what have been discovered almost 200 years ago is in an escalating fashion. The major application of the supercritical state of a common gas (carbon dioxide) is an extremely important technology, since at the critical pressure and temperature carbon dioxide is not a solid, not a liquid neither a gas and it has a no surface tension, which qualifies to be an extremely good ‘non polar solvent’ and therefore applicable for extraction of essential oils, caffeine and several other applications. The major advantages on the SFE are over the lower operating energy cost and the extracted compound remains intact as there is not thermal decomposition and the final concentrate is free of any residual processing solvent due to carbon dioxide’s natural tendency being a gas which however, is volatile in ambient temperature and pressure. The process of purification does not require any distillation to purify the extracted compound, just the pressure is released and the carbon dioxide as a solvent will leave the concentrate liquid at the bottom of the vessel, as a gas, and will not have any binding or forming azeotrope mixture that are difficult to separate to high purity. The supercritical condition of a gas or liquid is not fully being exploited and there is a great opportunity for more industrial application as to be elaborated in this paper.

Extraction of Actinides and Lanthanides by Supercritical Fluid

2010 ◽  
Author(s):  
Liyang Zhu ◽  
Wuhua Duan ◽  
Jingming Xu ◽  
Yongjun Zhu
Keyword(s):  
Supercritical Fluid Extraction ◽  
Nuclear Fuel ◽  
Supercritical Fluid ◽  
Nuclear Waste ◽  
Industrial Application ◽  
Chemical Engineering ◽  
Liquid Waste ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Used Nuclear Fuel

Reprocessing of used nuclear fuel and treatment of nuclear waste are important issues for the sustainable development of nuclear energy. It is necessary to develop novel nuclear waste treatment technologies to meet the goal of minimizing the secondary liquid waste. Supercritical fluids are considered green solvents in chemical engineering process. It gains growing interest to treat nuclear waste using supercritical fluid extraction recently, because it can greatly decrease the secondary liquid waste with high radioactivity. During the past two decades, extraction of actinides and lanthanides by supercritical fluid has been intensively studied in some countries, and many important progresses have been made. However, the prospect of industrial application of supercritical fluid extraction technology in reprocessing of used nuclear fuel and treatment of nuclear waste is still unclear. In this paper, extraction of actinides and lanthanides from various matrixes or from their oxides by supercritical fluid including the experimental results, extraction mechanism and kinetic process was reviewed. The engineering demonstration projects were introduced. The trend of industrial application of supercritical fluid extraction technology in nuclear waste management was also discussed.

scholarly journals Valorization of Tropical Biomass Waste by Supercritical Fluid Extraction Technology

2020 ◽  
Vol 13 (1) ◽  
pp. 233
Author(s):  
Yee Ho Chai ◽  
Suzana Yusup ◽  
Wan Nadiah Amalina Kadir ◽  
Chung Yiin Wong ◽  
Siti Suhailah Rosli ◽  
...  
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Value Added ◽  
Full Potential ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Biomass Waste ◽  
Tropical Regions ◽  
Supercritical Fluid Technology ◽  
Biomass Resources

The inception of sustainable and cleaner extraction technology has paved the way for the innovative development of nonconventional extractions, such as supercritical fluid extraction, apart from conventional extraction counterparts. The concept of biomass waste-to-wealth for the conversion of biomass waste or by-products into value-added products for diversified applications had piqued the prominent interest of researchers and industry players, especially with the abundance of biomass resources readily available in tropical regions that have yet to be tapped into to reach their full potential. In this paper, a critical review of the developments of supercritical fluid technology from its initial inception up to commercialized scalability, including its limitations, extraction of potential tropical biomass wastes for various types of applications, such as biopesticides, bio-repellents, phenolics, and lipids for biofuel, and its role in circular bioeconomy and sustainable development approaches, are discussed in detail.

Production of polyhydroxyalkanoates from spent coffee grounds oil obtained by supercritical fluid extraction technology

2014 ◽  
Vol 157 ◽  
pp. 360-363 ◽  
Author(s):  
Madalena V. Cruz ◽  
Alexandre Paiva ◽  
Pedro Lisboa ◽  
Filomena Freitas ◽  
Vítor D. Alves ◽  
...  
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Spent Coffee Grounds ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Coffee Grounds
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