Hi Indika,
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.
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.
Hope this might help.
Doug Williams,
Fluidyne.
On 28/06/17 07:57, Indika Gallage wrote:
*Question:*
I have been using gas chromatography to analyse the producer gas
mixture*. 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*? We have to sample a gas with 50% CO.
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)
can some one shed some light on this?
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