کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231064 1427412 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of organic acids from alginate in high temperature water
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Production of organic acids from alginate in high temperature water
چکیده انگلیسی

Hydrothermal treatment was conducted on alginate in the interest of obtaining organic acids. Formic acid, acetic acid, lactic acid, glycolic acid, 2-hydroxybutyric acid, succinic acid, malic acid, mannuronic acid and guluronic acid were obtained by the hydrothermal treatment of alginate. The total yield of the organic acids were 46% at maximum yield 350 °C, 40 MPa and 0.7 s reaction time. The formation of organic acids, suggest that the carboxyl group structure of the alginate was preserved during the hydrothermal decomposition of the alginate. The formation of dicarboxylic acids is evidence that oxidation reactions occur during the hydrothermal treatment, introducing carboxyl groups into the decomposition products. The product distribution indicates that both acid and base catalyzed reactions occurred during the hydrothermal treatment of alginate. Hydrothermal treatment of an uronic acid, glucuronic acid, gave the same organic acids as those obtained from hydrothermal treatment of alginate. The reaction from alginate to organic acids probably proceeds via the formation of hexuronic acid (mannuronic acid and guluronic acid) under hydrothermal conditions.

Figure optionsDownload as PowerPoint slideHighlights
► Proposal for producing organic acids from a biomass (alginate: compound found in sea algae) that contains a carboxyl group in its structure, compared to cellulose that does not have any carboxyl group in its structure.
► Total organic acid yields up to 46%.
► Catalyst free conversion in high temperature water conditions.
► Proposal of chemical production from marine biomass and potential applications in the future biochemical process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 65, May 2012, Pages 39–44
نویسندگان
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