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Molecules 2016, 21(1), 85; doi:10.3390/molecules21010085

Low Temperature Soda-Oxygen Pulping of Bagasse

1,2,3
,
1,* and 2,3,*
1
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China
2
State Kay Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
3
Department of Biochemistry and Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, WI 53726, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Farid Chemat
Received: 9 December 2015 / Revised: 6 January 2016 / Accepted: 8 January 2016 / Published: 13 January 2016
View Full-Text   |   Download PDF [1127 KB, uploaded 13 January 2016]   |  

Abstract

Wood shortages, environmental pollution and high energy consumption remain major obstacles hindering the development of today’s pulp and paper industry. Energy-saving and environmental friendly pulping processes are still needed, especially for non-woody materials. In this study, soda-oxygen pulping of bagasse was investigated and a successful soda-oxygen pulping process for bagasse at 100 °C was established. The pulping parameters of choice were under active alkali charge of 23%, maximum cooking temperature 100 °C, time hold at maximum temperature 180 min, initial pressure of oxygen 0.6 MPa, MgSO4 charge 0.5%, and de-pithed bagasse consistency 12%. Properties of the resultant pulp were screened yield 60.9%, Kappa number 14, viscosity 766 dm3/kg, and brightness 63.7% ISO. Similar pulps were also obtained at 110 °C or 105 °C with a cooking time of 90 min. Compared with pulps obtained at higher temperatures (115–125 °C), this pulp had higher screened yield, brightness, and acceptable viscosity, while the delignification degree was moderate. These results indicated that soda-oxygen pulping at 100 °C, the lowest cooking temperature reported so far for soda-oxygen pulping, is a suitable process for making chemical pulp from bagasse. Pulping at lower temperature and using oxygen make it an environmental friendly and energy-saving pulping process. View Full-Text
Keywords: bagasse; brightness; Kappa number; low temperature; soda-oxygen pulping; environmentally friendly; energy-saving bagasse; brightness; Kappa number; low temperature; soda-oxygen pulping; environmentally friendly; energy-saving
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Yue, F.; Chen, K.-L.; Lu, F. Low Temperature Soda-Oxygen Pulping of Bagasse. Molecules 2016, 21, 85.

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