See comments. On Wed, Oct 12, 2011 at 8:30 AM, Kevin <[email protected]> wrote:
> ** > Dear Paul > > ----- Original Message ----- > *From:* Paul Olivier <[email protected]> > *To:* Discussion of biomass cooking stoves<[email protected]> > *Sent:* Tuesday, October 11, 2011 9:44 PM > *Subject:* Re: [Stoves] High mass space heating options Re: Rocket Stove > forthe PLACE > > ...del... > > For example, one kg of rice hulls produces about $0.21 in gas but only > about $0.07 in biochar. > In other words, biochar comes in at only one third of the value of the gas. > > # Very interesting!! > > 1: Does the 1.0 kG of rice hulls yield EITHER $.21 of gas OR $.07 worth > of char > OR, > does it yield $.21 worth of gas + $.07 of char, total $.28 per kG? > > It's not "or" but "plus". Another way to put it is one metric ton of rice hulls is worth $283 US in gas *and *biochar. > > 2: What is the weight yield of biochar from 1 kG of rice hull? > > >From 30% to 50% by weight: this depends on the rate of gasification. > > 3: Are the people actually using this biochar for agricultural purposes? > > Yes, it is commonly used throughout Vietnam. > > Thanks!! > > Kevin > > Biochar production therefore is a by-product of gas production. > But if the the rice hull can be obtained, as is usually the case, > free-of-charge, > and if biochar can be sold at a nice profit, > then gas is produced at a negative cost. > Also note that when rice hulls are properly gasified, > no smoke is produced. > So in producing gas, one earns a profit in the sale of biochar. > The big economic driver in this instance is the production of gas. > > There are people in Vietnam who know nothing about the value of rice hull > gas, > and they are busy each day making rice hull biochar in crude retorts. > These low-temperature retorts emit clouds of smoke that can be seen from > miles around. > Focusing only on biochar production, these people do a lot of damage to the > environment and should be shut down. > The biochar that they produce is anything but uniform. > > For more on this, see: > http://dl.dropbox.com/u/22013094/Paper/park.pdf > See the section on gasification starting on page 79. > I am a big believer in utilizing a multiplicity of approaches with regard > to biomass. > > Thanks. > Paul Olivier > Vietnam > > On Wed, Oct 12, 2011 at 6:40 AM, Steve Taylor < > [email protected]> wrote: > >> >> >> On 11 October 2011 17:55, Fireside Hearth < >> [email protected]> wrote: >> >>> Dear Steve, >>> >>> I spent most of my adult life teaching people how to heat their >>> homes without smoke coming from the chimney, when I see pictures of areas >>> where bio char is being made I see horrible air pollution from the fires, >>> >> >> I see "biochar" being used as an excuse for burning to clear land rather >> than the emissions generated being considered pollution from the process of >> making it. >> >> Steve >> >> _______________________________________________ >> Stoves 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/stoves_lists.bioenergylists.org >> >> for more Biomass Cooking Stoves, News and Information see our web site: >> http://www.bioenergylists.org/ >> >> >> > > > -- > Paul A. Olivier PhD > 27C Pham Hong Thai Street > Dalat > Vietnam > > Louisiana telephone: 1-337-447-4124 (rings Vietnam) > Mobile: 090-694-1573 (in Vietnam) > Skype address: Xpolivier > http://www.esrla.com/ > > ------------------------------ > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > ------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1410 / Virus Database: 1522/3943 - Release Date: 10/07/11 > > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > -- Paul A. Olivier PhD 27C Pham Hong Thai Street Dalat Vietnam Louisiana telephone: 1-337-447-4124 (rings Vietnam) Mobile: 090-694-1573 (in Vietnam) Skype address: Xpolivier http://www.esrla.com/
_______________________________________________ Stoves 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/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/
