کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
685434 889039 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bleaching of soda pulp of fibres of Musa textilis nee (abaca) with peracetic acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Bleaching of soda pulp of fibres of Musa textilis nee (abaca) with peracetic acid
چکیده انگلیسی

In this work, we studied the influence of operational variables in the bleaching of soda pulp of Musa textilis nee (abaca) [viz. temperature (55–85 °C), bleaching time (30–150 min) and peracetic acid concentration oven dry pulp (0.5–4.5%)] on the kappa number and viscosity of the bleached pulp, as well as on the breaking length, burst index and brightness of paper sheets made from it.For this purpose, we used a central composite factorial design in order to identify the optimum operating conditions. In this way equations relating the dependent variables to the operational variables of the bleaching process were derived. These equations reproduce the dependent variables with errors less than 12% for all, except the viscosity which was predicted with errors less than 18%.Obtaining bleached pulp with the highest possible viscosity (1519 ml/g), and paper sheets with the maximum possible breaking length (6547 m) and burst index (5.00 kN/g), entails using a temperature of 55 °C, a peracetic acid concentration of 4.5% and a bleaching time of 150 min. This provides a brightness of 79.90%, which is only 6.53% lower than the maximum possible value (85.48%).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 99, Issue 5, March 2008, Pages 1474–1480
نویسندگان
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