کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231453 1427441 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extraction of caffeine from tea stalk and fiber wastes using supercritical carbon dioxide
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Extraction of caffeine from tea stalk and fiber wastes using supercritical carbon dioxide
چکیده انگلیسی

The purpose of this study was to investigate obtaining of caffeine from tea plant wastes by supercritical carbon dioxide extraction. Experiments were carried out with tea stalk and fiber wastes of Turkish tea plants that has no economical value. Stalk and fiber wastes were supplied from tea factories. These wastes were ground, sieved and dried at 105 °C temperature in an oven. Parameters affecting caffeine leaching from tea wastes were determined to be, extraction time, extraction temperature, carbon dioxide flow rate, process pressure and particle size. The maximum yield of caffeine from tea stalk wastes and fiber wastes were 14.9 mg/g tea stalk and 19.2 mg/g tea fiber, respectively. The yield increase had been recorded as 61.9% and 65.5%, respectively, in comparison with the chloroform extraction of tea stalk and fiber wastes.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 50, Issue 3, October 2009, Pages 225–228
نویسندگان
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