TAILIEUCHUNG - Caffeine and chlorogenic acid separation from raw coffee beans using supercritical CO2 in water

The aim of Caffeine and chlorogenic acid separation from raw coffee beans using supercritical CO2 in water was to develop new process for extracting and separating hydrophilic and hydrophobic compounds from coffee beans using supercritical CO in water. In this work, experiments and simulation of the process has been conducted. Chlorogenic acid and caffeine from coffee beans were used as model compounds of hydrophilic and hydrophobic compounds, respectively. | CAFFEINE AND CHLOROGENIC ACID SEPARATION FROM RAW COFFEE BEANS USING SUPERCRITICAL CO2 IN WATER Siti Machmudah Kumamoto University Kumamoto JAPAN Kiwa Kitada Kumamoto University Kumamoto JAPAN Mitsuru Sasaki Kumamoto University Kumamoto JAPAN Motonobu Goto Kumamoto University Kumamoto JAPAN Jun Munemasa Kobe Steel Ltd. JAPAN Masahiro Yamagata Kobe Steel Ltd. JAPAN Abstract The aim of this work was to develop new process for extracting and separating hydrophilic and hydrophobic compounds from coffee beans using supercritical CO2 in water. In this work experiments and simulation of the process has been conducted. Chlorogenic acid and caffeine from coffee beans were used as model compounds of hydrophilic and hydrophobic compounds respectively. Experiment was conducted in the semi-continuous flow extractor at various densities and ratios of coffee mass and water mass C W . Extracted compounds in SC-CO2 and in water were analyzed by HPLC-PDA detector respectively. As expected the extracted compound in SC-CO2 was containing 100 purity of caffeine. However the extracted compound in water was containing caffeine and chlorogenic acid. It was due to the solubility of caffeine in water is higher than that in SC-CO2. Recovery of caffeine in SC-CO2 increased with increasing density and decreasing ratio of coffee mass and water mass C W . In addition this process was also simulated using model based on mass transfer balance to estimate recovery of caffeine and to describe concentration profile inside of the extractor both in SC-CO2 phase and water phase . Simulation was conducted using Visual Basic in Excel 2003. As in the experimental result the recovery of caffeine in SC-CO2 increased with the increase in density. However the effect of C W on the recovery of caffeine in SC-CO2 yielded adversative result. In the simulation result the recovery of caffeine in SC-CO2 decreased with decreasing C W. The result can be explained that increasing mass of water caused increasing mass .

• Hoá dầu
• Caffeine and chlorogenic acid separation from raw coffee
• Supercritical CO2 in water
• Separation using SCCO
• Water in Batch Modes
• Caffeine in SCCO2 phase
• Effect of temperature on the recovery of caffeine