[Gasification] Gas Sampling

Doug doug.williams.nz at gmail.com
Thu Jun 29 14:58:22 CDT 2017

Hi Indika,

There is a reduction in CO if the gas is collected at over 500C, due to 
it revering to soot and CO2. You need to quench the gas temperature as 
it is extracted from the collection point as close to the internal gas 
where it exits the char bed. If you can do this, then the accuracy of 
the analysis will be improved. It would be interesting to see what the 
other gas % is claimed by the designer.

Sorry to hear that Ray has passed over. We had quite a few exchanges 
about biomass fuel growing.


Doug Williams.


On 30/06/17 03:14, Indika Gallage wrote:
> Hello Doug,
> The gasifier has not been tested yet, but the designers claim to have 
> 50% CO in the gas with previous gasifiers, which was unimaginable to 
> me. When we were speaking of sampling the gas, we have been warned 
> that the CO of the gas may convert while sampling. This is why  I am 
> researching on the fact.
> Certainly,the most sensible thing is a directly coupled gas analyser. 
> The equipment is rather costly; we will have to use the inline 
> measurements if we get lower readings from sampling to confirm.
> Thank you for your time and a very clear explanation.
> Best Regards
> Indika

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