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Electrochemical production of polysulfides and sodium hydroxide from while liquor .2. Electrolysis in a laboratory scale flow cell
KTH, Tidigare Institutioner                               , Kemiteknik.ORCID-id: 0000-0002-9392-9059
KTH, Tidigare Institutioner                               , Kemiteknik.
1997 (Engelska)Ingår i: Journal of Applied Electrochemistry, ISSN 0021-891X, E-ISSN 1572-8838, Vol. 27, nr 5, s. 519-528Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Electrochemical production of polysulfide-containing white liquor and pure sodium hydroxide solution was investigated at 90 degrees C in a laboratory scale flow cell. A mixed iridium-tantalum oxide coated titanium electrode was used as the anode and the two electrolyte compartments were separated by a cation-exchange membrane. The process was demonstrated at current densities up to 5 kA m(-2), resulting in high current efficiencies for both products. The previously reported autocatalytic effect of polysulfide ions was confirmed, and its technical implications on the use of three-dimensional electrodes were demonstrated and discussed. The current efficiency was found to depend strongly on the degree of conversion of sulfur(-II) to sulfur(0). The anode material showed favourable properties, with respect to activity and selectivity, but suffered from limited durability.

Ort, förlag, år, upplaga, sidor
1997. Vol. 27, nr 5, s. 519-528
Identifikatorer
URN: urn:nbn:se:kth:diva-12875ISI: A1997WX63100003OAI: oai:DiVA.org:kth-12875DiVA, id: diva2:319499
Anmärkning
QC 20100518Tillgänglig från: 2010-05-18 Skapad: 2010-05-18 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. Electrochemical generation of polysulfide liquor and sodium hydroxide from white liquor
Öppna denna publikation i ny flik eller fönster >>Electrochemical generation of polysulfide liquor and sodium hydroxide from white liquor
1998 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 1998. s. 73
Serie
Trita-KET, ISSN 1104-3466 ; 80
Nyckelord
White liquor, Kraft pulping, Polysulfides, Sodium hydroxide, Electrolysis, Autocatalysis, Cation-selective membranes, DSA, Nickel, Graphite
Nationell ämneskategori
Oorganisk kemi
Identifikatorer
urn:nbn:se:kth:diva-2613 (URN)99-2513020-4 (ISBN)
Disputation
1998-02-20, 00:00 (Engelska)
Anmärkning
QC 20100518Tillgänglig från: 2000-01-01 Skapad: 2000-01-01 Senast uppdaterad: 2010-05-18Bibliografiskt granskad

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