Formic and acetic acid as agents for a cleaner fractionation of Miscanthus x giganteus |
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| Authors: | Juan José Villaverde Pablo Ligero Alberto de Vega |
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| Affiliation: | 1. Laboratory of Fiber and Cellulose Technology, Åbo Akademi University, Porthaninkatu 3, FI-20500 Turku, Finland;2. Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing, Jiangsu 210037, China;2. Forest Products Laboratory and Center for Bioenergy and Bioproducts, Auburn University, 520 Devall Drive, Auburn, AL 36849, United States;3. Department of Chemical and Natural Gas Engineering, Texas A&M University, 700 University Blvd, Kingsville, TX 78363, United States;1. Key Laboratory for Industrial Biocatalysis, Ministry of Education of China, Institute of Applied Chemistry, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;2. School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, Guangxi 530006, China;1. College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing, Jiangsu 210037, China;2. Forest Products Laboratory and Center for Bioenergy and Bioproducts, Auburn University, 520 Devall Drive, Auburn, AL 36849, United States |
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| Abstract: | Miscanthus. x giganteus bark was subjected to acetic and formic acid fractionation. The kinetics of the process were explained by a model of two parallel first-order reactions, for pulp yield and delignification, and by Saeman's kinetics based models, for total polysaccharides and viscosity of pulps. The influence of hydrochloric acid concentration on both organosolv processes was studied at two levels: 0.10 and 0.15% by weight. The models provided a good fit of the experimental data and helped to predict the best set of independent variables to obtain a good fractionation.Both systems achieved similar delignification levels and pulp characteristics, although the evolution in formic acid was faster than in acetic acid, mainly due to the great extent of reactions in the warming up period that accounted for about a third part of the initial dry weight of the raw material. |
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