<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Dear Saravanakumar (and all Pyroysis and Gasification members)</div><div><br></div><div>Here is an old letter I found that I didn't answer. Better late than never.</div><div><br></div><div>There is no exact answer to the question "how much CO2" from a ton of biomass, since there are so many kinds of biomass. (Or even worse, "from a ton of charcoal", since there are X10 as many types of charcoal as wood)</div><div><br></div><div>One of my colleagues (Ray Desrosiers) gave me an "average" formula for biomass (particularly good for woody biomass)</div><div><br></div><div>C H1.4 O0.6</div><div><br></div><div>MW = 23.0 g/mole </div><div><br></div><div>Heat of Combustion DH= 21 kJ/mole or (21/23) 0.91 kJ/gm</div><div><br></div><div><span style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">I have remembered and used these averages for many years, and no one has questioned them. </span></div><div><><><></div><div><br></div><div>% Carbon in biomass = (12/23) 52%</div><div><br></div><div>MW CO2 = 44</div><div><br></div><div>Tons CO2/ton Biomass (0.52x44/12) = 1.91 Tons/Ton (or tonne, the metric ton, since it is a ratio)</div><div><br></div><div><><><></div><div><br></div><div>So the amount of CO2 generated from a ton of this "average" biomass is ( 0.52 x 3.7) 1.92 tons of CO2/ton of biomass. </div><div><br></div><div>I would be happy to have comments on these numbers.</div><div><br></div><div><><><> </div><div><br></div><div>Yours truly,</div><div><br></div><div>Tom Reed </div><div><br></div><div>AKA<br>Thomas B Reed<span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); "> </span><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);">280 Hardwick Rd</span></div><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);">Barre, MA 01005</span></div><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);"><br></span></div><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);">508 353 7841</span></div></div><div><br>On Aug 19, 2011, at 1:35 PM, "A.Saravanakumar" <<a href="mailto:sara_mnes@rediffmail.com">sara_mnes@rediffmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div>Dear Booster Reed,<br>
<br>
How much ton of biomass will burn to produce 1 ton of CO2?<br>
<br>
A. Saravanakumar<br>
<br>
On Fri, 19 Aug 2011 00:38:55 +0530 wrote<br>
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Today's Topics:<br>
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<br>
<br>
1. Re: CO2 emission of whole system for smaall size generator<br>
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(20kWe) (GF)<br>
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2. Re: CO2 emission of whole system for smaall size generator<br>
<br>
(20kWe) (Arnt Karlsen)<br>
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3. Re: CO2 emission of whole system for smaall sizegenerator<br>
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(20kWe) (Thomas Reed)<br>
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Message: 1<br>
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Date: Wed, 17 Aug 2011 21:04:26 -0400 (EDT)<br>
<br>
From: GF <gfwhell@aol.com><br>
<br>
To: <a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a><br>
<br>
Subject: Re: [Gasification] CO2 emission of whole system for smaall<br>
<br>
size generator (20kWe)<br>
<br>
Message-ID: <<a href="mailto:8CE2B59E894A95D-1C20-23C51@Webmail-m104.sysops.aol.com">8CE2B59E894A95D-1C20-23C51@Webmail-m104.sysops.aol.com</a>><br>
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Content-Type: text/plain; charset="utf-8"<br>
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It is a little known fact that CO2 can be converted into Methane. Years <br>
ago this was expensive and quite a difficult reaction to perform, <br>
involving very high pressure and temperature reaction chambers together <br>
with exotic catalysts. However,over the years since "Sabatier" <br>
discovered how to perform this remarkable feat, fuel and chemical <br>
refiners have developed a lower cost approach. But fairly high <br>
temperatures are still required, making the process expensive. <br>
Fortunately, there is considerable waste heat available at the exhaust <br>
manifold of your Engine to supplant some of this cost. Additional heat <br>
is also required in order to re-arrange the molecules back into fuel, <br>
this is where a stream of hydrogen from an out side source such as your <br>
gasifier will help, as will super heated distilled water. The <br>
additional heat can be provided by a plasma produced by an arc or an <br>
electrode less plasma produced by Electromagnetic means. nothing more <br>
than 2kw. <br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
GF <br>
<br>
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<br>
-----Original Message-----<br>
<br>
From: J?r?mie Biton <jb@groupeden.net><br>
<br>
To: gasification <gasification@lists.bioenergylists.org><br>
<br>
Sent: Wed, Aug 17, 2011 9:45 am<br>
<br>
Subject: [Gasification] CO2 emission of whole system for smaall size <br>
generator (20kWe)<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Hello to all,<br>
<br>
<br>
<br>
Does anybody have an idea of the CO2 emission after generator?<br>
<br>
For comparison, a diesel generator of this size (20kWe) has a rate of <br>
about 1,1 kgeqCO2/kWh.<br>
<br>
<br>
<br>
Thanks <br>
<br>
Regards<br>
<br>
<br>
<br>
Jeremy<br>
<br>
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Message: 2<br>
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Date: Thu, 18 Aug 2011 08:46:39 +0200<br>
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From: Arnt Karlsen <arnt@c2i.net><br>
<br>
To: <a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a><br>
<br>
Subject: Re: [Gasification] CO2 emission of whole system for smaall<br>
<br>
size generator (20kWe)<br>
<br>
Message-ID: <20110818084639.0748c1ee@celsius.lan><br>
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Content-Type: text/plain; charset=US-ASCII<br>
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On Wed, 17 Aug 2011 21:04:26 -0400 (EDT), GF wrote in message <br>
<br>
<<a href="mailto:8CE2B59E894A95D-1C20-23C51@Webmail-m104.sysops.aol.com">8CE2B59E894A95D-1C20-23C51@Webmail-m104.sysops.aol.com</a>>:<br>
<br>
<br>
<br>
> <br>
<br>
> It is a little known fact that CO2 can be converted into Methane.<br>
<br>
> Years ago this was expensive <br>
<br>
<br>
<br>
..still is: <br>
<br>
<a href="http://en.wikipedia.org/wiki/Methane#Atmospheric_methane">http://en.wikipedia.org/wiki/Methane#Atmospheric_methane</a><br>
<br>
<br>
<br>
-- <br>
<br>
..med vennlig hilsen = with Kind Regards from Arnt Karlsen<br>
<br>
...with a number of polar bear hunters in his ancestry...<br>
<br>
Scenarios always come in sets of three: <br>
<br>
best case, worst case, and just in case.<br>
<br>
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<br>
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------------------------------<br>
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Message: 3<br>
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Date: Wed, 17 Aug 2011 21:38:05 -0400<br>
<br>
From: Thomas Reed <tombreed2010@gmail.com><br>
<br>
To: Discussion of biomass pyrolysis and gasification<br>
<br>
<gasification@lists.bioenergylists.org><br>
<br>
Cc: "<gasification@lists.bioenergylists.org>"<br>
<br>
<gasification@lists.bioenergylists.org><br>
<br>
Subject: Re: [Gasification] CO2 emission of whole system for smaall<br>
<br>
sizegenerator (20kWe)<br>
<br>
Message-ID: <b98b9fe9-cbef-47f9-8f96-2b5e0e78aeb8@gmail.com><br>
<br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
<br>
<br>
Jeremy and all<br>
<br>
<br>
<br>
Both gasoline and diesel are approximately -CH2- chained together. <br>
Their combustion can be written<br>
<br>
<br>
<br>
CH2 + 3/2(O2 + 3.76 N2) ==> CO2 + H2O + 5.64 N2<br>
<br>
M 14. 44. 18 158. 220<br>
<br>
<br>
<br>
So the all important Air/Fuel, A/F ratio is 220 /14= 15.7<br>
<br>
<br>
<br>
The ratio is often given as 14.7. Maybe this is due to the presence of <br>
unsaturated and aromatics with lower H/C ratios.<br>
<br>
<br>
<br>
The oxygen sensor is capable of measuring very small amounts of <br>
unburned fuel or oxygen in the exhaust and adjusting the A/F ratio for <br>
perfect combustion. <br>
<br>
<br>
<br>
Diesel combustion is always lean.<br>
<br>
<br>
<br>
Lucky us that our cars are so clean.<br>
<br>
<br>
<br>
Tom Reed<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On Aug 17, 2011, at 9:44 AM, J?r?mie Biton <jb@groupeden.net> wrote:<br>
<br>
<br>
<br>
> Hello to all,<br>
<br>
> <br>
<br>
> <br>
<br>
> <br>
<br>
> Does anybody have an idea of the CO2 emission after generator?<br>
<br>
> <br>
<br>
> For comparison, a diesel generator of this size (20kWe) has a rate of <br>
about 1,1 kgeqCO2/kWh.<br>
<br>
> <br>
<br>
> <br>
<br>
> <br>
<br>
> Thanks<br>
<br>
> <br>
<br>
> Regards<br>
<br>
> <br>
<br>
> <br>
<br>
> <br>
<br>
> Jeremy<br>
<br>
> <br>
<br>
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