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Online monitoring of inorganic cooking chemicals in white liquor by pulse voltammetry
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad Fysik. Linköpings universitet, Tekniska högskolan.
Senset AB, Linkoping.
Senset AB, Linkoping.
Billerud Skarblacka AB, Skarblacka.
Vise andre og tillknytning
2010 (engelsk)Inngår i: TAPPI JOURNAL, ISSN 0734-1415, Vol. 9, nr 8, s. 49-53Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

White liquor parameters in the recovery area of a kraft pulp mill were monitored for a 1-year period using rhodium as an electrode material in a sensor system based on pulse voltammetry. Shift personnel performed offline titration analysis of the liquor every 4 hours. The results for effective alkali, sulfidity, and total titratable alkali were used to train and validate the sensor for online monitoring. Partial least square regression models developed from 150 reference titration results for each parameter from the first month of the study predicted concentrations for the following 11 months. Validation of the models using titration results indicated that overall relative root mean squared errors for prediction of the parameters were 3.7% for effective alkali, 3.4% for sulfidity, and 5.1% for total titratable alkali. Process stops that exposed the sensor to temperature excursions or acid washings resulted in temporary periods of poor prediction.

sted, utgiver, år, opplag, sider
Tappi Press , 2010. Vol. 9, nr 8, s. 49-53
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-64233ISI: 000285249400006OAI: oai:DiVA.org:liu-64233DiVA, id: diva2:388432
Tilgjengelig fra: 2011-01-17 Laget: 2011-01-17 Sist oppdatert: 2011-01-17

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