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Separation of ligni...
Separation of lignin in kraft cooking liquor from a continuous digester by ultrafiltration at temperatures above 100 degrees C
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- Wallberg, Ola (författare)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
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- Jönsson, Ann-Sofi (författare)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- Elsevier BV, 2006
- 2006
- Engelska.
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Ingår i: Desalination. - : Elsevier BV. - 1873-4464 .- 0011-9164. ; 195:1-3, s. 187-200
- Relaterad länk:
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http://dx.doi.org/10...
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Abstract
Ämnesord
Stäng
- Lignin was extracted by ultrafiltration from kraft cooking liquors taken directly from a continuous digester. The temperature of the liquors was 145 degrees C (softwood) or 135 degrees C (hardwood), the total dry solids content was 18% and the pH 13-14. Methods for start-up, shut-down and cleaning of conventional UF equipment modified for this demanding application, were developed. The influence of transmembrane pressure, cross-flow velocity and temperature on the performance of two ceramic membranes with cut-offs of 5,000 and 15,000 Da was studied. The flux of softwood liquor at 145 degrees C and a TMP of 400 kPa was 100 l/m(2) h for the membrane with the 15,000 Da cutoff and 50 l/m(2) h for the membrane with the 5,000 Da cut-off. The retention of lignin was 20% and 30% for the 15,000 Da and 5,000 Da membranes, respectively.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Nyckelord
- high
- temperature
- ceramic membranes
- ultrafiltration
- Kraft cooking liquor
- lignin
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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