Good going John. Could you give us some url's for those? (#3 I know already!)
Thanks Keith Addison Journey to Forever Handmade Projects Tokyo http://journeytoforever.org/ >Hi Eric >Would love to see some more comments on this list on this subject >There is quite a bit on the net if you search but a lot of the information >seems to be contradictory. >One article says only 100% Sulphuric Acid will work. and less than 50% there >is no reaction. >Another says concentrated sulphuric is a weak acid and dilute sulphuric is a >strong acid and 1% to 7% works best for lignin. and that a more concentrated >acid will stop the glucose formation. > >Some little snips > 1. First, the biomass is collected, dried, and milled to pass through a 4 >mesh screen. Then the material is transferred to a first stage hydrolyser >or large vat. Sulfuric acid (7.65% by weight) is added to the vat which is >heated to 100¡ C for 2 hours. ( The Tennessee Valley Authority) > >2. Acid Hydrolysis. Acid hydrolysis normally occurs in two stages. >During the first stage, weak acids break the hemicellulose into its sugar >components. A more severe second stage uses strong acid treatment for >hydrolyzing the cellulose component of the feedstock to glucose' a >six-carbon sugar. >Easter and Goldstein (1992) > >3. Next, pour what chemists refer to as 18 Molar H2SO4, sulfuric acid, >over the sawdust. The commercial designation, if you order it from a >chemical supply house, would be 100% sulfuric acid. However, as low >as 91% will work. We tried 9.2 Molar, or 51%, in the lab and it >simply didn't work. It just sat there and looked at us. >by Mike Brown > >I'm confused but still reading. and I know that 27% from a battery will work >on cotton and got the holes in my jeans to prove it.! > > >Date: Sat, 04 Nov 2000 01:59:12 -0000 > > From: "Eric Deaver" <[EMAIL PROTECTED]> > >Subject: Cellulose Conversion > > >OK, I have read the part of the ethanol manual on cellulose > >conversion. Can someone point me in the direction of more detail on > >the processes used in converting cellulose (with low lignin content) > >to glucose? Any help would be appreciated. -------------------------- eGroups Sponsor -------------------------~-~> eLerts It's Easy. It's Fun. Best of All, it's Free! http://click.egroups.com/1/9699/2/_/837408/_/973467359/ ---------------------------------------------------------------------_-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html To unsubscribe, send an email to: [EMAIL PROTECTED]
