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<DIV><FONT face=Arial>Dear Otto</FONT></DIV>
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dir=ltr>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=terra-matricula@hotmail.com
href="mailto:terra-matricula@hotmail.com">Otto Formo</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=bill_klein@3ialternativepower.com
href="mailto:bill_klein@3ialternativepower.com">bill_klein@3ialternativepower.com</A>
; <A title=gasification@lists.bioenergylists.org
href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 22, 2011 9:22
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Gasification] Any
experience with Stak Properties 10K gasifier?</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>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> </DIV>
<DIV><FONT face=Arial># Pellets do work very well in a JXQ-10 type gasifier,
in that it is a "Stratified Downdraft Gasifier", with an open top, through
which all the air enters.</FONT></DIV>
<DIV><FONT face=Arial>The "Imbert Type Gasifiers", with nozzle air entry, and
a closed top, will not likely work well with absorbent pellets, in that there
is circulation of pyrolysis gases up through the fuel bed. This is why a
monorator will work on an Imbert style gasifier.</FONT></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> </DIV>
<DIV><FONT face=Arial># No. It is not the composition of the pellet material
that is the problem... the problem is "upward circulation of moist pyrolysis
gases" giving their moisture up to absorbent pellets. I have run highly
absorbent wood pellets in the JXQ-10 Gasifier, with absolutely no
problem.</FONT></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> </DIV>
<DIV><FONT face=Arial># In a TLUD system, pyrolysis gases are swept upward,
and the moisture content of the pyrolysis gases has no opportunity to contact
the fuel pellets before they are turned into char.</FONT></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> </DIV>
<DIV><FONT face=Arial># I haven't tried grass pellets. I understand they work
well, but that under certain circumstances, there can be a problem with slag
and clinkers.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Kevin</FONT></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>> >
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