1 reply to this topic

[chessboss]

Hello,

 

I have two gas streams leaving my production plant. One has a composition of 60% hydrogen, 13% carbon monoxide, 9% carbon dioxide and the rest methane. The other has a composition of 9% hydrogen, 3% carbon monoxide, 70% carbon dioxide and the rest methane. I am quite certain that the first stream can be used as fuel gas because I have seen an article with fuel containing 50% carbon dioxide. But I'm not sure about the second stream. If the gas is to be flared anyway, would it be better to use it as fuel? However, I'm worried that the high CO2 content would affect the combustion process.

[Saml]

With 60% Hidrogen, your main concern is flame flashback. Flamefront velocity is higher for hidrogen. See the acticle below from one of the largest (if not the larget) burner vendors.

 

https://www.johnzink...vice/july-2010/

 

But yes, the first stream can (and should) definitively be burned. Just need to have your burners designed by a reputable vendor.

 

Regarding the second, it may be better to send it to a burner even if it does not provide too much in terms of heating. Otherwise you will need to send it to a flare, and becaue of its low heating value you may need to add suplemental gas to keep the mix above a certain value (See 40 CFR 60.18©(3)(ii))