[Biofuel] removing water from ethanol / methanol
I've been wondering about a reverse osmosis filtering system, whether or not it would be able to remove water from ethanol or methanol. Maybe it would take a different membrane from the one commonly used to filter impurities from water, if it would work at all. Seems like there might be less energy used in that process than refractory distillation, or using a molecular sieve. Any ideas? -- Contentment comes not from having more, but from wanting less. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * All generalizations are false. Including this one. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This email is constructed entirely with OpenSource Software. ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
Re: [Biofuel] removing water from ethanol / methanol
I'm not really sure, but the way of working of reverse osmosis is to separate a concentrated solution (of one/various solid in a liquid) between an very-low concentrated solution and a very-high solution. But it is the case of solids solved in liquids. The problem between methanol-ethanol/water is that they are both miscible liquids, so the technique, in this case, I think it's not applicable. The refractory distillation and molecular sieves are totally different ways to purificate, but are the best to separate miscible liquids. 2007/5/3, doug swanson [EMAIL PROTECTED]: I've been wondering about a reverse osmosis filtering system, whether or not it would be able to remove water from ethanol or methanol. Maybe it would take a different membrane from the one commonly used to filter impurities from water, if it would work at all. Seems like there might be less energy used in that process than refractory distillation, or using a molecular sieve. Any ideas? -- Contentment comes not from having more, but from wanting less. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * All generalizations are false. Including this one. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This email is constructed entirely with OpenSource Software. ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/ ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
Re: [Biofuel] removing water from ethanol / methanol
2007/5/3, doug swanson [EMAIL PROTECTED]: I've been wondering about a reverse osmosis filtering system, whether or not it would be able to remove water from ethanol or methanol. Maybe it would take a different membrane from the one commonly used to filter impurities from water, if it would work at all. Seems like there might be less energy used in that process than refractory distillation, or using a molecular sieve. It's called pervaporation: http://www.cheresources.com/pervaporation.shtml___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
