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Application of nanofiltration to separate salts from a hydrogen‐sulphide scrubber solution
Author(s) -
Jamaluddin A. K. M.,
Bary JP.,
Nazarko T. W.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710306
Subject(s) - nanofiltration , chemistry , membrane , nuclear chemistry , inorganic chemistry , chromatography , biochemistry
Abstract Experiments were carried out using nanofiltration to separate salts from a hydrogen sulphide scrubber solution taken from an iron‐based liquid‐redox process. The scrubber solution used in these experiments contained organic chelating agents, iron, and various alkali metal inorganic salts (i.e., sulphates, thiosulphates, carbonates, and bicarbonates). The nanofiltration unit was equipped with monovalent ion‐selective membranes. Results indicated that the nanofiltration membranes retained organic materials and iron and allowed ionic species (e.g., SO 4 2‐ , S 2 3‐ , CO 3 2‐ , HCO 3 ‐ ) to permeate. Results also indicated that the nanofiltration membranes used in these experiments preferentially removed CO 3 2‐ and HCO 3 ‐ over SO 4 2‐ and S 2 O 3 2‐ . The nanofiltration tests did not show any sign of membrane degradation in terms of ion selectivity; however, at high total‐dissolved solids concentrations, the permeate flow rate was reduced.