Environmentally friendly pulping and bleaching of bagasse |
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| Institution: | 1. University of Khartoum, People''s Hall 11113, POB 6272, Khartoum, Sudan;2. Institute of Wood Chemistry, 21031 Hamburg, Germany;1. Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisas em Energia e Materiais (CNPEM), Caixa Postal: 6192, 13083-970, Campinas, São Paulo, Brazil;2. Instituto de Química de São Carlos, Universidade de São Paulo, Avenida Trabalhador São-carlense 400, São Carlos, 13566-590, Brazil;3. École Internationale du papier, de La communication imprimée et dês biomatériaux, 461 Rue de la Papeterie, CS10065, Saint Martin d''Hères Cedex, France;1. National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou 510641, PR China;2. Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou 510641, PR China;3. Kingfa Science and Technology Co., Ltd, Guangzhou 510663, PR China;1. Norwegian University of Science and Technology(NTNU), Trondheim, Norway;2. Department of Pulp and Paper Industries, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran;3. Paper and Fiber Research Institute (PFI), Høgskoleringen 6b, Trondheim 7491, Norway;1. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA;1. College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China;2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China;3. Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY, 13210, United States;4. Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China |
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| Abstract: | Depithed Sudanese bagasse was examined for its suitability for pulp production. Bagasse fibre dimensions, morphological and chemical characteristics are reported. The pulping trials were carried out with soda–AQ and alkaline sulphite–AQ (AS–AQ) methods and soda method as reference. The AS–AQ pulping gave the best results in yield, degree of delignification, mechanical and optical pulp properties. Blending of bagasse and bamboo alkaline sulphite–anthraquinone pulps in different ratios gave well-balanced pulp strength characteristics with good tensile and tear indices, widening the range of different end products from bagasse pulp. Totally chlorine free bleaching (Q1O/PQ2P) of the best unbleached bagasse pulps gave bleached pulps of 76.9% ISO brightness, suitable for use in writing and printing grades of paper. |
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