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- W2016292005 abstract "Abstract Process solutions for membrane purification of chlorine gas are presented, based on experimental results from a comprehensive study of permeability and selectivity of the gases Cl2, O2, N2 and H2 as well as their durability in an aggressive gas environment. The objective is to establish a simple membrane scheme for purification of the chlorine gas coming from electrolysis in the production of magnesium. Removal of oxygen from this gas is crucial to avoid formation of H2O when the pure, dry chlorine gas reacts with hydrogen further down the process line. Three materials were chosen: a polydimethylsiloxane (PDMS) membrane, a carbon molecular sieve (CMS) membrane and a surface modified glass membrane. Separation experiments with mixed gas (Cl2–O2) were carried out for PDMS and the glass membrane over a wide range of chlorine compositions (5–95% Cl2). In the rubbery PDMS material permeabilities of the mixtures deviated only little from those previously measured for pure gas — maintaining the pure gas selectivities. For the glass membrane, where separation was based on a surface selective flow (SSF), a slight decrease in selectivity was found mainly due to reduced Cl2 permeation. Mixed gas experiments were not carried out for the CMS membrane since the mechanism for the separation is molecular sieving. The Cl2 will then essentially be withheld; O2 and N2 will permeate. Based on the pure gas permeation data obtained for these materials, simulations were performed for an optimized membrane scheme for purification of Cl2. The process solutions, which are suggested, are optimized with respect to minimum membrane area, minimum Cl2 in waste stream and minimum energy requirements for recompression and recycling of the permeate. The solutions vary with respect to process conditions (temperature), membrane material, required permeation area and energy requirement. Preferred process temperature and the price of membrane material will be crucial factors for decision making. The findings related to process conditions and suitable materials for membrane purification of chlorine gas are general and applicable to various kinds of gas streams containing Cl2." @default.
- W2016292005 created "2016-06-24" @default.
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- W2016292005 date "2001-01-01" @default.
- W2016292005 modified "2023-09-26" @default.
- W2016292005 title "Purification of chlorine gas with membranes — an integrated process solution for magnesium production" @default.
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- W2016292005 doi "https://doi.org/10.1016/s1383-5866(00)00208-2" @default.
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