Jerry, We had a discussion and documentation on this list a year ago about tar cracking. Heat only will not do it. You need some partial oxidation or a ctalyast. See, for example, "Formation, Decomposition and Cracking of Biomass Tars in Gasification" DTU 2005 http://gasifiers.bioenergylists.org/gasdoc/tars/pyrotar2.pdf
Tom -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of jerry freedomev Sent: Monday, September 06, 2010 6:38 AM To: Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] tube reactor for gas-to-liquids tests? Hi Jeff and All, Yes as I've been saying for yrs now here, cracking tars into H2-CO should be a no brainer. I'd suggest running them through a long SS coiled tube on the burning chamber sides as an example heated to 1500f with pulled apart SS dish scrubbies inside which should crack about anything into syn gas thus cleaning it up, increasing quality and reducing fouling. The heat can be recycled into the gasification section input air or biomass destructively distilling it. Many steel, other plants use these methods to get carbon/coke from biomass or coal and power their operations. Some use the tars to make water gas, making coke/charcoal then hitting the hot charcoal with hot steam, making syngas/H2-CO. Another could be a fluidized bed reactor using nickel/SS turnings, bits, etc. Many ways to skin that cat. My old Mark's Manual, an old engineers manual that can be found used, shows multiple ways to get syngas which use to be used as a fuel gas for towns, etc. Jerry Dycus --- On Mon, 9/6/10, Jeff Davis <[email protected]> wrote: > From: Jeff Davis <[email protected]> > Subject: Re: [Gasification] tube reactor for gas-to-liquids tests? > To: "Discussion of biomass pyrolysis and gasification" <[email protected]> > Date: Monday, September 6, 2010, 12:32 AM > Tar cracker? > > > Jeff > > > On Sun, 2010-09-05 at 13:00 -0700, jerry freedomev wrote: > > Nickel, Platinum, etc tend to break down HC's > into H2, CO with > > correct temps, pressures. > > > _______________________________________________ > Gasification mailing list > [email protected] > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > http://gasifiers.bioenergylists.org > http://info.bioenergylists.org > > UNSUBSCRIBE HERE; > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org UNSUBSCRIBE HERE; http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org UNSUBSCRIBE HERE; http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
