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UV characterization of sulphide-polysulphide solutions and its application for process monitoring in the electrochemical production of polysulphides
KTH, Superseded Departments, Chemical Engineering and Technology.
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0002-9392-9059
KTH, Superseded Departments, Chemical Engineering and Technology.
1996 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 22, no 6, J187-J191 p.Article in journal (Refereed) Published
Abstract [en]

The UV spectral characteristics of some sulphur species of relevance for the electrochemical production of polysulphides have been studies. It was found that an isosbestic point exists in the hydrogen sulphide ion-polysulphide solution. The absorption at this point (249 nm) is proportional to the total sulphur concentration in the solution. The investigation also shows that the spectrum of a polysulphide solution can be regarded simply as the sum of contributions from charges hydrogen sulphide ion and zero-valent sulphur in polysulphides although a complicated equilibrium distribution of different species exists in the polysulphide solution. The spectrum provides enough information for the measurement of these forms of sulphur. Based on spectrophotometric measurements, a simple monitoring for changed hydrogen sulphide ion and polysulphide excess sulphur in the process liquor can be realized.

Place, publisher, year, edition, pages
1996. Vol. 22, no 6, J187-J191 p.
Keyword [en]
spectroscopy, photometry, ultraviolet spectra, electrochemistry, oxidation, sulfides, polysulfides, sulfur, hydrogen sulfide, production, POLYSULFIDE IONS
Identifiers
URN: urn:nbn:se:kth:diva-12871ISI: A1996UR40800001OAI: oai:DiVA.org:kth-12871DiVA: diva2:319470
Note
QC 20100518Available from: 2010-05-18 Created: 2010-05-18 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Electrochemical generation of polysulfide liquor and sodium hydroxide from white liquor
Open this publication in new window or tab >>Electrochemical generation of polysulfide liquor and sodium hydroxide from white liquor
1998 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 1998. 73 p.
Series
Trita-KET, ISSN 1104-3466 ; 80
Keyword
White liquor, Kraft pulping, Polysulfides, Sodium hydroxide, Electrolysis, Autocatalysis, Cation-selective membranes, DSA, Nickel, Graphite
National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:kth:diva-2613 (URN)99-2513020-4 (ISBN)
Public defence
1998-02-20, 00:00 (English)
Note
QC 20100518Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2010-05-18Bibliographically approved

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