Dear Jason. Life and Chemistry are very complicated, but perseverance and flexibility will usually find an answer.
Thanks for the details, Tom Reed Dr Thomas B Reed President, The Biomass Energy Foundation www.Woodgas.com On Jul 13, 2011, at 5:37 PM, Jason Stewart <[email protected]> wrote: > Hi Tom, > > I hate to post here too often as I am just a babe in gasification terms. > > I passed the comment on thermite welding because I spent 3 months using the > technique to weld the copper tails onto the aluminium buzzwork for the > aluminium smelting cells. This was to distribute 96,000Amps at 4V at the > Tiwai Point Aluminium Smelter. > > The thermite mix was aluminium and copper oxide. This required a staged start > with two different compounds to bring the temperature of the aluminium up to > a point where it destabilised and ignited. About 2 seconds at over 2000° the > molten copper would melt through the copper retaining discs and drop through > into the mold. > > I have no doubt you understand the chemistry better than I. What we were able > to achieve was to take the CADWELD training from the English engineer and > increase their expected output by 250% from 8 welds per two man team per day, > to 20. We actually did that by lunch time, but it was getting embarrassing > for them so we dithered around in the afternoons. At the same time we halved > the expected failure rate:) > > Kind Regards > > Jason Stewart > > On Wed, Jul 13, 2011 at 11:21 PM, Thomas Reed <[email protected]> wrote: > Dear Mark and all > > Thermite welding is usually based on Mg, not Aluminum, but I presume a > properly prepared aluminum powder with minimal oxide skin could be used. > > Tom Reed > > Dr Thomas B Reed > President, The Biomass Energy Foundation > www.Woodgas.com > > On Jul 12, 2011, at 11:32 PM, Jason Stewart <[email protected]> wrote: > >> Haha, you are then set up for thermite welding. >> >> On Wed, Jul 13, 2011 at 2:59 PM, Mark E. Ludlow <[email protected]> wrote: >> Dr. Tom, >> >> Can one hammer mill->ball mill the Al into a powder and burn it directly >> (stand back!)? >> >> Mark >> >> >> >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Thomas >> Reed >> Sent: Tuesday, July 12, 2011 5:53 PM >> >> >> To: Discussion of biomass pyrolysis and gasification; Art Krenzel >> Cc: [email protected] >> Subject: Re: [Gasification] CONSERVATION OF ENERGY >> >> >> PS. >> >> >> >> According to my book, THE FREE ENERGY OF BINARY COMPOUNDS (available at >> Woodgas.com) >> >> >> >> The Enthalpy of combustion of Al >> >> >> >> Al + 3/2 O2 ==> 1/2 Al2O3. Delta H (C) = 178 kcal/mole = 745 kJ/mole. The >> MW of Al is 27, so this is 27.6 kJ/g or 12,527 kJ/ lb. 1 kW hr is 3.8 MJ, >> so this is 3.3 kW hr/lb. >> >> >> >> Well worth capturing. >> >> >> >> Tom Reed >> >> >> Dr Thomas B Reed >> >> President, The Biomass Energy Foundation >> >> www.Woodgas.com >> >> >> On Jul 12, 2011, at 7:51 PM, GF <[email protected]> wrote: >> >> >> >> >> >> The other day I posted an article on this site concerning: >> >> Cornish Hydrogen Generator. Keelynet, which describes a method of converting >> >> Aluminum into its oxide and in the process cracks water, freeing up hydrogen >> for use as fuel for a light car. >> >> By all accounts, using this gas in the place of any other fuel. >> >> Distances and the amount of metal used in this attainment were mentioned. >> >> I was hoping for a reaction from one of the many “Energy Economists” >> >> Who lurk on this site, to respond with negative information regarding the >> impracticality and waste fullness of such a process? >> >> I believe there is a large following on this site who are interested in >> obtaining electrical power using renewable energy, derived from carbon >> neutral sources. >> >> They might question the economics and ethics of using a refined ore as fuel. >> >> Instead of chopping down oxygen producing vegetation. >> >> In this respect I am a nonconformist. I believe most Aluminum is produced by >> Hydro electric power and, so the CO2 is not in the equation. >> >> My second comment is harnessing a “free” supply of high temperature heat >> which is emitted from most Ice’s in the form of “Hot Exhaust”. >> >> This is the place to install a reactor capable of converting beer cans into >> hydrogen as not too much energy would be needed to complete the reaction. >> Bubbling super heated steam through a molten bath of AL would give pure >> hydrogen. >> >> No tar, and the ash is a hot commodity >> >> >> >> The real question is: how much energy is locked up in a pound of AL >> >> >> >> gfwhell >> >> >> >> _______________________________________________ >> Gasification mailing list >> >> to Send a Message to the list, use the email address >> [email protected] >> >> to UNSUBSCRIBE or Change your List Settings use the web page >> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org >> >> for more Gasifiers, News and Information see our web site: >> http://gasifiers.bioenergylists.org/ >> >> >> _______________________________________________ >> Gasification mailing list >> >> to Send a Message to the list, use the email address >> [email protected] >> >> to UNSUBSCRIBE or Change your List Settings use the web page >> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org >> >> for more Gasifiers, News and Information see our web site: >> http://gasifiers.bioenergylists.org/ >> >> >> >> >> -- >> Kind Regards >> >> Jason Stewart >> 3 Opahi Bay Road, >> RD3 >> Warkworth >> 09 4220054 >> >> >> >> _______________________________________________ >> Gasification mailing list >> >> to Send a Message to the list, use the email address >> [email protected] >> >> to UNSUBSCRIBE or Change your List Settings use the web page >> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org >> >> for more Gasifiers, News and Information see our web site: >> http://gasifiers.bioenergylists.org/ > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/ > > > > > -- > Kind Regards > > Jason Stewart > 3 Opahi Bay Road, > RD3 > Warkworth > 09 4220054 > > > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/
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