Purification of chlorine gas with membranes — an integrated process solution for magnesium production

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