Delignification of wheat straw using a mixture of carboxylic acids and peroxoacids |
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| Affiliation: | 1. Laboratoire de Catalyse, Chimie Fine et Polymères, Institut National Polytechnique, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 Route de Narbonne, 31077 Toulouse Cedex 04, France;2. Compagnie Industrielle de la Matière Végétale, 62 Chemin Champs de Lassalle, 47310 Estillac, France;1. Laboratory of Food Chemistry and Biochemistry & Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Kasteelpark Arenberg 20, 3001 Leuven, Belgium;2. Compagnie Industrielle de la Matière Végétale (CIMV), 134-142 rue Danton, 92593 Levallois Perret, France;3. Energy Research Centre of The Netherlands (ECN), Biomass & Energy Efficiency, Westerduinweg 3, 1755 LE Petten, The Netherlands;4. Wageningen UR Food & Biobased Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands;5. DSM Bio-based Products & Services B.V., DSM Biotechnology Center, Alexander Fleminglaan 1, 2613 AX Delft, The Netherlands;1. Biotechnology Program, Agricultural Technology, Walailak University, Tasala, Nakhon Si Thammarat 80161, Thailand;2. School of Engineering, Massey University, Private Bag 11 222, Palmerston North, New Zealand;3. Oil Palm Research Unit, Walailak University, Tasala, Nakhon Si Thammarat 80161, Thailand;1. Biomass & Bioenergy Research Centre, Huazhong Agricultural University, Wuhan, 430070, China;2. College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China;3. Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts & Science, Xiangyang, China;4. College of Life Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China;1. University Institute of Chemical Technology, North Maharashtra University, Jalgaon 425001, MS, India;2. Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440033, MS, India;3. Department of Chemical Engineering, National Institute of Technology, Warangal 506004, Telangana State, India;4. Graduate School of Medical and Biological Head, The Department of Food and Biotechnology FGAOU VO “South Ural State University” (NIU), Russia |
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| Abstract: | Wheat straw was pulping by an Organosolv process using a mixture of acetic acid/formic acid/water (AA/FA/water). In order to make easier the bleaching step, it was possible to improve the delignification in an efficient and selective manner by using peroxoacids in acidic organic medium. First a solution of peroxoacids was synthesized by adding hydrogen peroxide in a mixture of acetic acid/formic acid, without any inorganic acids as catalyst. Then this mixture was added to the unbleached pulp. Several parameters (temperature, extraction alkaline, reaction time …) were investigated.This simple and innovative way to use peroxoacids allows to overcome problem due to the control of their stability in aqueous medium and proves to be perfectly complementary to the cooking method in a carboxylic acid medium. Low kappa numbers and high viscosity were obtained. Strength properties of the pulp after the peroxoacids step were improved. |
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