کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
629057 1455498 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of alkali resistant nanofiltration membranes for the separation of hemicellulose from concentrated alkaline process liquors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Evaluation of alkali resistant nanofiltration membranes for the separation of hemicellulose from concentrated alkaline process liquors
چکیده انگلیسی

The performance of five polymeric nanofiltration and tight ultrafiltration membranes was investigated during separation of hemicellulose from process liquors containing 200 g/l sodium hydroxide. The effect of pressure and temperature on flux and retention was determined to enable optimization of operating conditions. Retention behavior was further elucidated by calculating retention as a function of molar mass obtained from size exclusion chromatography (SEC) between 100 and 50,000 g/mol. The experimental data show that hemicellulose is almost quantitatively retained at molar masses above 1,000 g/mol. Two of the membranes exhibiting excellent overall hemicellulose retention (around 90%) are most suitable for efficient removal of hemicellulose from the process. The results emphasize the need for accurate retention data from industrial effluents and process conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 192, Issues 1–3, 10 May 2006, Pages 303-314