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<p>Hi Indika,</p>
<p>The short answer to your question is no, water vapor as you
describe will not result in lowering the CO content of your gas
sample. It is not clear if you expect to get 50% CO from your gas,
which when analyzed has a lower CO content. I have never seen
producer gas with 50% CO content, but if you had a directly
coupled gas analyzer measuring continuously, you could expect to
see fluctuations depending on the system design and variation of
fuel being gasified. Any gas sample is only valid for the moment
in time that it was taken, but the key is to minimize, or
understand why the system fluctuates.<br>
</p>
<p>We have had gas analysis done over 35 years, and samples
collected in metal, glass, and gas bags, in each case water was
used to collect the sample by drainage suction. None of the
measuring laboratories had issues with residue moisture affecting
the results. The only exception to the containment limitations,
were the gas bags, where-by the analysis must be done within three
days due to the H2 content escaping through the bag walls.</p>
<p>Hope this might help.<br>
</p>
<p>Doug Williams,</p>
<p>Fluidyne.<br>
</p>
<p> <br>
</p>
<br>
<div class="moz-cite-prefix">On 28/06/17 07:57, Indika Gallage
wrote:<br>
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<p class="MsoNormal"><b><span>Question:</span></b></p>
<p class="MsoNormal"><span>I have been using gas chromatography
to analyse the producer gas mixture<b>. I would like to
know, if the gas sample extracted from the gasifier will
change it’s CO composition significantly with the presence
of water vapor</b>? We have to sample a gas with 50% CO. </span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>I have gone through a research paper
where they suggest that the composition will not
significantly vary, but these samples did not have the high
concentration of CO. However, the content of CO had the most
variation out of all the gasses, the conclusion of this
paper was that the gasses did not change composition at -15
C, 15c , 45C at 2758 and Kpa 8274 Kpa pressure. (“Evaluation
of syngas storage under different pressures and
temperatures”, Yang P,2009, Applied Engineering in
Agriculture) </span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>can some one shed some light on this?</span></p>
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