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Liquid Transportation Fuels From Natural Gas

autothermal reforming syngas fischer-tropsch ft-synthesis gtl gas-to-liquids synthesis gas

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#1 cristinasabo

cristinasabo

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Posted 17 February 2014 - 08:08 PM

Hello everyone,

 

I am working on my undergrad design project and I am running into some issues with simulating the process. I want to create transportation fuels from natural gas. The first step is to create syngas and I am doing that through Autothermal Reforming.

 

My issue right now is concerning the reforming reaction. Am I right in believing that the reaction I want to use is 4CH_4 + O_2 + 2H_2O <=> 10H_2 + 4CO  ?

 

I know that I want my ratio of H2/CO to be around 2 - 2.2. However, I must be specifying something incorrectly because I cannot get my product from my reactor to be that low. The ratio I'm getting is around 2.5

 

 

Any help or guidence would be extremely appreciated.

 

 

Thank you! :)



#2 PingPong

PingPong

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Posted 19 February 2014 - 04:59 AM

First read some theory about the subject. You cannot simply expect molecules to obey your wish for a certain H2/CO ratio, they only obey thermodynamics. And they will also produce CO2.

 

Mixture composition at ATR outlet is governed by chemical equilibria at the ATR outlet T and P. Figure out which equilibria are applicable here.

 

If you want lower H2/CO in product you will need to affect equilibria at outlet by: ..... (use your imagination)






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