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Dear all,<div><div><br></div><div>How come that pellets does not operate very well in a gasifier unit like the 10K?</div><div><br></div><div>I know that pellets made out of pine and sproose wood have a bit high content of soot.</div><div>I belive that the pellets made out of trees with leaves have less black carbon and gives a cleaner burn.</div><div><br></div><div>We are using 6-8 mm wood pellets made out of mainly pine in the TLUD ND PekoPe and it works perfectly for cooking/heating and production of biochar.</div><div>These are quality pellets, according to European Standards, with low density.</div><div>We would like to have sizes of 10 to 15 mm, if possible, but these are not available in the commercial marked, yet.</div><div><br></div><div>Its good news to hear that pellets of Switchgras is working well.</div><div>Hopefully pellets of Vetriver grass will do the same?</div><div><br></div><div>Otto F.</div><div><br></div><div> </div><div>> From: Bill_Klein@Powerhearth.com<br>> To: gasification@lists.bioenergylists.org<br>> Date: Wed, 22 Jun 2011 07:36:44 -0400<br>> Subject: Re: [Gasification] Any experience with Stak Properties 10K gasifier?<br>> <br>> Hi, Kevin.<br>> <br>> Your question of feedstock size is rather interesting and one to which I can <br>> easily relate. That said, I hope the following provides a little bit of <br>> insight and doesn't aggravate the experts on this list.<br>> <br>> Before we ship our units, they undergo several tests.<br>> <br>> Test 1 is a 24 hour non stop test in which we push all of the limits. Said <br>> differently, we look for the weaknesses, leaks, etc.<br>> Test 2 is another 24 hour non stop test. It provides us with systems <br>> calibration.<br>> Test 3 is a 100 hour non stop test. During this period, all of the necessary <br>> data points are established for our automation and management system.<br>> <br>> Why am I describing an important phase of our unit fabrication, truncated as <br>> the description may be?<br>> <br>> I wanted to point out the importance of properly sized feedstock for, if <br>> there is a screw up with gas flow or aglomeration, the test is stopped and <br>> rerun.<br>> <br>> When we test, depending upon the customer's intended feedstock, we test and <br>> evaluate the gas from at least three feedstocks, one of which is a close <br>> approximation of that which the customer will use. Size of the feedstock is <br>> critical unless one really enjoys non stop runs, grumpy technicians and <br>> buckets of coffee.<br>> <br>> Pellets: We won't use them. They are seldom uniform (cross sectionally) in <br>> moisture content and generally sealed. With heat, they shatter <br>> magnificently, leaving a pile of sawdust. The exception seems to be <br>> pelletized switchgrass: a great feedstock.<br>> <br>> The chip size we like resembles an Oreo cookie, squared. As an approximation <br>> it works to gauge sizes. Overall length or width uniformity doesn't seem to <br>> be as critical as thickness. Still, there is a lot of flexibility and <br>> smaller sizes are okay to integrate, as an exception, not the rule. <br>> Gasifiers are not stoics. Built properly, they have some versatility, but <br>> you have to make friends with your unit before you learn her secrets. Then <br>> you merely have to respect them. .<br>> <br>> Charcoal briquettes as a feedstock too often creates a huge problem as they <br>> plug the grate with compacted fines.<br>> <br>> The best and my most favorite feedstock is still chunks. 2x4x4 - or <br>> briquettes of almost anything.<br>> <br>> Kevin, I would have gladly answered earlier, but you posted hours after my <br>> bedtime. We old folks need our beauty sleep.<br>> <br>> <br>> Respectfully,<br>> <br>> Bill Klein<br>> 3i<br>> <br>> <br>> <br>> <br>> <br>> ----- Original Message ----- <br>> From: <kchisholm@ca.inter.net><br>> To: <gasification@lists.bioenergylists.org><br>> Sent: Tuesday, June 21, 2011 10:13 PM<br>> Subject: Re: [Gasification] Any experience with Stak Properties 10K <br>> gasifier?<br>> <br>> <br>> Dear Bill<br>> <br>> Quoting Bill Klein <Bill_Klein@Powerhearth.com>:<br>> <br>> > To underscore Greg's email, repeating what I was taught, "The<br>> > quality of the gas is in direct proportion to the quality of the<br>> > char." Larger feedstock makes great char!<br>> <br>> # OK!! Do you think one can make "Engine Grade Gas" using:<br>> 1: Wood pellets, 1/4" diameter, 1/4" to 1/2" long?<br>> 2: Wood chips screened to -1/4", +1/8"?<br>> 3: Wood chips screened to -1/2",+ 1/4"?<br>> 4: Wood chips screened to -1", + 1/2"?<br>> <br>> Thanks!<br>> <br>> Kevin<br>> ><br>> ><br>> > Respectfully,<br>> ><br>> > Bill Klein<br>> > 3i<br>> ><br>> > http://www.3iAlternativePower.com<br>> ><br>> ><br>> > -- Original Message -----<br>> > From: Greg Manning<br>> > To: Discussion of biomass pyrolysis and gasification<br>> > Sent: Tuesday, June 21, 2011 7:40 PM<br>> > Subject: Re: [Gasification] Any experience with Stak Properties<br>> > 10K gasifier?<br>> ><br>> ><br>> > Pete, (and list)<br>> ><br>> > What, and how big, are the fuel chunks ?<br>> ><br>> > most gasifiers do NOT like wood chips, or really "fine" fuel, the<br>> > interstitial space the gasifier is designed to run with, is<br>> > generally much larger than that of chips or fine feedstock, using<br>> > the correct sized fuel, in-turn, lowers the reaction core<br>> > temperature, thus creating more, and more consistant amounts, of CO.<br>> > (the main flamable gas, in woodgas). (H2 and CH4 are simply "bonus"<br>> > gases.....)<br>> ><br>> > Greg Manning.<br>> ><br>> ><br>> ><br>> ><br>> ><br>> ><br>> > On Mon, Jun 20, 2011 at 6:01 PM, Pete & Sheri<br>> > <spaco@baldwin-telecom.net> wrote:<br>> ><br>> > Has anyone here had any experience running an engine using the<br>> > Stak Properties 10K gasifier?<br>> ><br>> ><br>> ><br>> > They tell me that the JXQ-10 gasifier is a forerunner to this<br>> > machine. I have one of those. I?d like to be able to correspond<br>> > with others who have this style of machine. Currently I am having<br>> > mixed results getting a steady flow of good gas to run my 6.5 KW<br>> > Onan 1800 rpm genset from it. On Saturday, I got it to deliver<br>> > about 3.8 kw for about 12 minutes, but then the quality of the gas<br>> > deteriorated. On Sunday a similar test produced worse results, but<br>> > over about a one hour period, with gas quality again deteriorating<br>> > as the test went proceded.<br>> ><br>> > I am not writing to waste the time of senior members here by<br>> > asking them to troubleshoot my problems, without enough info. Just<br>> > want to show what kind of issues I have for those who might be<br>> > involved with similar equipment.<br>> ><br>> > My goals are to: 1. See how much power I can squeeze out of<br>> > the generator for an extended period of time with this gas source,<br>> > and 2. To get some actual experience making woodgas.<br>> ><br>> ><br>> ><br>> > Looking back over my videos and notes, I can see a dozen or two<br>> > things that I could do better next time.<br>> ><br>> ><br>> ><br>> > Pete Stanaitis<br>> ><br>> ><br>> > _______________________________________________<br>> > Gasification mailing list<br>> ><br>> > to Send a Message to the list, use the email address<br>> > Gasification@bioenergylists.org<br>> ><br>> > to UNSUBSCRIBE or Change your List Settings use the web page<br>> ><br>> > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org<br>> ><br>> > for more Gasifiers, News and Information see our web site:<br>> > http://gasifiers.bioenergylists.org/<br>> ><br>> ><br>> ><br>> ><br>> ><br>> > --<br>> > Regards,<br>> ><br>> > Greg Manning,<br>> > Brandon, Manitoba, Canada<br>> ><br>> ><br>> ><br>> > ------------------------------------------------------------------------------<br>> ><br>> ><br>> > _______________________________________________<br>> > Gasification mailing list<br>> ><br>> > to Send a Message to the list, use the email address<br>> > Gasification@bioenergylists.org<br>> ><br>> > to UNSUBSCRIBE or Change your List Settings use the web page<br>> ><br>> > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org<br>> ><br>> > for more Gasifiers, News and Information see our web site:<br>> > http://gasifiers.bioenergylists.org/<br>> ><br>> <br>> <br>> <br>> <br>> _______________________________________________<br>> Gasification mailing list<br>> <br>> to Send a Message to the list, use the email address<br>> Gasification@bioenergylists.org<br>> <br>> to UNSUBSCRIBE or Change your List Settings use the web page<br>> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org<br>> <br>> for more Gasifiers, News and Information see our web site:<br>> http://gasifiers.bioenergylists.org/ <br>> <br>> <br>> <br>> _______________________________________________<br>> Gasification mailing list<br>> <br>> to Send a Message to the list, use the email address<br>> Gasification@bioenergylists.org<br>> <br>> to UNSUBSCRIBE or Change your List Settings use the web page<br>> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org<br>> <br>> for more Gasifiers, News and Information see our web site:<br>> http://gasifiers.bioenergylists.org/<br>> <br></div></div> </div></body>
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