scholarly journals CO2 Supercritical Extraction of Essential Oil of Jordanian Rosemary

2019 ◽  
Vol 102 (2) ◽  
pp. 662-665 ◽  
Author(s):  
Mamdouh Allawzi ◽  
Hussein Allaboun ◽  
Atheer Almasri
Keyword(s):  
Carbon Dioxide ◽  
Essential Oil ◽  
Extraction Process ◽  
Effect Of Temperature ◽  
Cosmetic Products ◽  
Active Ingredients ◽  
Essential Components ◽  
Temperature And Pressure ◽  
Carbon Dioxide Co2 ◽  
Trapping Agent

Abstract Background: Experimental investigation of supercritical fluid extraction (SFE) of active ingredients from rosemary herb has been performed. Carbon dioxide (CO2) was used as a solvent with ethanol as a trapping agent. This work showed that the SFE can be an exceptional alternative to the use of chemical solvents. Objective: The effect of temperature and pressure on the extraction process was investigated to increase the yield of the extracted essential components. Methods: The types of extracted compounds from rosemary were specified and analyzed using GC-MS. Results: The results indicated that several essential active ingredient compounds were extracted. Furthermore, the pressure affects the extraction, as the composition ofsome compounds increases with a pressure increase. Conclusions: SFE can be used to extract valuable active ingredients from rosemary. Two process parameters were investigated, namely, pressure and temperature, which indicate that SFE is aselective process for the production of certain constituents. Highlights: Some of themain components of the essential oil of Jordanianrosemary obtained in this study have important applications in pharmaceutical and cosmetic products. Forinstance, α-pinene is one of the main raw compounds used in the perfume industry.

scholarly journals Influence of pressure and time on extraction process using supercritical CO2

2008 ◽  
Vol 44 (1) ◽  
pp. 125-131 ◽  
Author(s):  
V. Micic ◽  
Z. Lepojevic ◽  
B. Mandic ◽  
M. Jotanovic ◽  
G. Tadic ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Co2 ◽  
Particle Diameter ◽  
Extraction Process ◽  
Salvia Officinalis ◽  
Quantitative Composition ◽  
Qualitative And Quantitative ◽  
Salvia Officinalis L ◽  
Carbon Dioxide Co2

The supercritical fluid extraction (SFE) by carbon dioxide (CO2) of Salvia officinalis L. was investigated. SFE by CO2 was performed at different pressure (80, 100, 150, 200 and 300 bar) and constant temperature of 40?C (all other extraction conditions, such are flow rate, particle diameter of Salvia officinalis, extraction time were kept constant. The GC-MS method was used for determination of qualitative and quantitative composition of obtained extracts and essential oils.

Inactivation of Escherichia coli (ATCC 4157) in Diluted Apple Cider by Dense-Phase Carbon Dioxide

2006 ◽  
Vol 69 (1) ◽  
pp. 12-16 ◽  
Author(s):  
GURBUZ GUNES ◽  
L. K. BLUM ◽  
J. H. HOTCHKISS
Keyword(s):  
Escherichia Coli ◽  
Carbon Dioxide ◽  
High Sensitivity ◽  
Effect Of Temperature ◽  
Dense Phase ◽  
Apple Cider ◽  
E Coli ◽  
Product Ratio ◽  
Log Reduction ◽  
Temperature And Pressure

Dense-phase carbon dioxide (CO2) treatments in a continuous flow through system were applied to apple cider to inactivate Escherichia coli (ATCC 4157). A response surface design with factors of the CO2/product ratio (0, 70, and 140 g/kg), temperature (25, 35, and 45°C), and pressure (6.9, 27.6, and 48.3 MPa) were used. E. coli was very sensitive to dense CO2 treatment, with a more than 6-log reduction in treatments containing 70 and 140 g/kg CO2, irrespective of temperature and pressure. The CO2/product ratio was the most important factor affecting inactivation rate of E. coli. No effect of temperature and pressure was detected because of high sensitivity of the cells to dense CO2. Dense CO2 could be an alternative pasteurization treatment for apple cider. Further studies dealing with the organoleptic quality of the product are needed.

scholarly journals Effect of Temperature and Pressure on Surface Tension of Polystyrene in Supercritical Carbon Dioxide

2007 ◽  
Vol 111 (15) ◽  
pp. 3859-3868 ◽  
Author(s):  
H. Park ◽  
R. B. Thompson ◽  
N. Lanson ◽  
C. Tzoganakis ◽  
C. B. Park ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Tension ◽  
Supercritical Carbon Dioxide ◽  
Effect Of Temperature ◽  
Temperature And Pressure ◽  
Supercritical Carbon

Simulation and Application of Fuzzy Theory for Supercritical Carbon Dioxide Extraction of Green Tea

2008 ◽  
Author(s):  
Shane-Rong Sheu ◽  
Ming-Jyi Jang ◽  
Cheng-Chi Wang ◽  
Chih-Ho Tsai ◽  
Yao-Ching Hsueh
Keyword(s):  
Carbon Dioxide ◽  
Green Tea ◽  
Fuzzy Theory ◽  
Fuzzy Model ◽  
Extraction Process ◽  
Experimental Investigations ◽  
Predictive Tool ◽  
Carbon Dioxide Extraction ◽  
Temperature And Pressure ◽  
C 50

This study performs a series of experimental investigations to determine the temperature and pressure conditions which maximize the quantities of caffeine and EGCG extracted from green tea using a supercritical fluid extraction process with a carbon dioxide solvent. The experimental data are then used to construct a fuzzy model for predicting the extractant quantities given the temperature and pressure conditions of the extraction process. The average discrepancy between the experimental results and the predicted results for the quantities of caffeine and EGCG extracted at temperatures of 40°C, 50°C and 60°C, respectively, is found to be just 7.38%, thus confirming the viability of the fuzzy model as a predictive tool. Overall, the results reveal that a temperature of 40°C and a pressure of 2500 psi represent the optimum extraction conditions for both caffeine and EGCG.

scholarly journals Construction of an experimental apparatus to simulate the greenhouse effect and global warming for educational use

2020 ◽  
Vol 8 (8) ◽  
pp. 427-431
Author(s):  
Paulo Renda Anderson ◽  
Carlos Mergulhão Júnior ◽  
Moacy José Stoffes Junior ◽  
Cléver Reis Stein
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Global Warming ◽  
Greenhouse Effect ◽  
Low Cost ◽  
Pressure Sensors ◽  
Experimental Apparatus ◽  
Atmosphere Temperature ◽  
Temperature And Pressure ◽  
Carbon Dioxide Co2

This article describes the construction of a complete experimental apparatus to simulate the greenhouse and global warming for educatioal use. These demonstrations are fundamental for people understand the importance of greenhouse effect to keep that life continues on earth and, know about climate change and the causes of global warming. For development of this devise we used an Arduino UNO, temperature and pressure sensors, and low cost products. The experimental results showed that the average atmosphere temperature increases with the increasing concentration of carbon dioxide (CO2). Moreover, this apparatus can be used in classroom to demonstration these important global phenomena.

Sign in / Sign up

Export Citation Format

Share Document