Extraction of caffeine, chlorogenic acids and lipids from green coffee beans using supercritical carbon dioxide and co-solvents

Azevedo, Álvaro Bandeira Antunes de; Mazzafera, Paulo; Mohamed, Rahoma S.; Melo, S.A.B. Vieira de; Kieckbusch, Theo Guenter

doi:10.1590/s0104-66322008000300012

Cited by 73 publications

(48 citation statements)

References 33 publications

(36 reference statements)

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“…Caffeine is not recovered, but charcoal can be regenerated at 800°C. The main disadvantage of using organic solvents is the low selectivity and, as a consequence, other substances important for beverage quality may be removed from the beans [16]. A highly selective method of decaf production is achieved with supercritical CO 2 , developed by Kurt Zosel in the 1970's and licensed by Kaffee HAG and later by General Foods [169].…”

Section: How To Get Rid Of Caffeinementioning

confidence: 99%

Decaf and the Steeplechase Towards Decaffito—the Coffee from Caffeine-Free Arabica Plants

Mazzafera

Baumann²,

Shimizu

et al. 2009

Tropical Plant Biol.

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Unquestionably, the popularity of the coffee beverage relies on its alerting attribute caffeine. However, susceptibilities to this purine alkaloid, quite frequently associated with health concerns, encouraged a significant market for decaffeinated coffee. The beans of Coffea arabica render the best beverage and a decaffeinated coffee has to preserve the desired organoleptic characteristics of this species. Consequently, besides technical removal of caffeine, the endeavors to attain a decaffeinated Arabica coffee range from traditional studies on genetic variability to advanced techniques to produce genetic modified coffee. The aim of this review is to recover part of this subject focusing mainly on the natural genetic variation for caffeine content in Arabica. We also present historical information about caffeine discovery and briefly discuss molecular approaches to reduce caffeine. We introduce here the term decaffito for coffee derived from Arabica plants with beans naturally low in or almost devoid of caffeine. In the near future, coffee drinkers avoiding caffeine will have the choice between basically three Arabica coffees, namely decaffeinated by (a) selection and breeding, (b) genetic modification and (c) industrial extraction. Although only the last decaf coffee is available for the consumers, we believe that the size of the market of each type will occupy in the future depend on the price and health aspects related to the way the decaffeinated coffee beans are obtained.

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Section: How To Get Rid Of Caffeinementioning

confidence: 99%

Decaf and the Steeplechase Towards Decaffito—the Coffee from Caffeine-Free Arabica Plants

Mazzafera

Baumann²,

Shimizu

et al. 2009

Tropical Plant Biol.

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“…The supercritical fluid has properties such as high diffusivity, low viscosity and low surface tension, which gives it attractive characteristics as a solvent for the extraction of components from the solid matrix (Taylor, 1996). Advantages of the use of carbon dioxide under supercritical conditions are selectivity (Cardozo et al, 2007;Azevedo et al, 2008) and solubility (Brennecke and Eckert, 1989). Marongiu et al (2004) studied the CO 2 supercritical extraction of S. molle and indicated that increasing the CO 2 density permits the extraction of compounds of high molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Supercritical fluid extraction of volatile and non-volatile compounds from Schinus molle L.

Barroso

Villanueva

Lucas

et al. 2011

Braz. J. Chem. Eng.

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-Schinus molle L., also known as pepper tree, has been reported to have antimicrobial, antifungal, anti-inflammatory, antispasmodic, antipyretic, antitumoural and cicatrizing properties. This work studies supercritical fluid extraction (SFE) to obtain volatile and non-volatile compounds from the aerial parts of Schinus molle L. and the influence of the process on the composition of the extracts. Experiments were performed in a pilot-scale extractor with a capacity of 1 L at pressures of 9, 10, 12, 15 and 20 MPa at 323.15 K. The volatile compounds were obtained by CO 2 supercritical extraction with moderate pressure (9 MPa), whereas the non-volatile compounds were extracted at higher pressure (12 to 20 MPa). The analysis of the essential oil was carried out by GC-MS and the main compounds identified were sabinene, limonene, D-germacrene, bicyclogermacrene, and spathulenol. For the non-volatile extracts, the total phenolic content was determined by the Folin-Ciocalteau method. Moreover, one of the goals of this study was to compare the experimental data with the simulated yields predicted by a mathematical model based on mass transfer. The model used requires three adjustable parameters to predict the experimental extraction yield curves.

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“…Both caffeine and chlorogenic acid were quantified following the methodology described by Azevedo et al (2008). In the case of caffeine determination in husks, after the extraction of compounds from coffee pods, samples were filtered through a 0.20 µm-pore membrane and injected into an Ultra Efficiency Liquid Chromatography column (UPLC, LC-2010HT, Shimadzu, São Paulo, Brazil).…”

Section: Methodsmentioning

confidence: 99%

Semen quality and reproductive performance of boars kept in pens containing conventional coffee husk as a floor covering

et al. 2016

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-The objective of this study was to evaluate the putative effects of the use of coffee husk as floor covering on boar semen quality. Sixteen boars were divided into two groups. The first group was held in a conventional system with a compact floor. The second group was kept on a compact floor covered with coffee pods. The experimental period was 60 days. Levels of caffeine and chlorogenic acid in the insemination doses (ID) before and after 96 h of storage at 15 °C and the reproductive performance (litter size and rate of return to estrus) of these doses after their utilization in a standard artificial insemination protocol were evaluated. The ID from the animals kept in pens containing the coffee pods contained 25.4±8.7 µg/mL of caffeine, whereas no significant amounts of chlorogenic acid were detected. Semen from boars housed with coffee husk showed a significant increase in malondialdehyde levels, which indicates a significant increase in cell membrane peroxidation, after 96 h of storage. There were no significant differences in the other evaluated semen quality parameters when analyzed among groups. Likewise, there was no significant influence of coffee hulls on either the rate of return to estrus or the litter size of inseminated females. The use of coffee husks as floor covering worsens the quality of fresh semen and that of insemination doses stored for 96 h but not the quality of semen immediately diluted; therefore, coffee husks may be used only on farms that use semen immediately processed after collection without affecting the reproductive parameters of breeding stock.

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Extraction of caffeine, chlorogenic acids and lipids from green coffee beans using supercritical carbon dioxide and co-solvents

Cited by 73 publications

References 33 publications

Decaf and the Steeplechase Towards Decaffito—the Coffee from Caffeine-Free Arabica Plants

Decaf and the Steeplechase Towards Decaffito—the Coffee from Caffeine-Free Arabica Plants

Supercritical fluid extraction of volatile and non-volatile compounds from Schinus molle L.

Semen quality and reproductive performance of boars kept in pens containing conventional coffee husk as a floor covering

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