5 replies to this topic

[Mojimee]

Hi 

 

Please can anyone help me with typical spec. of processed gas required as feed for gas turbines. Will I be right to infer that it is the same as sales pipeline gas spec. I reckon that newer turbines might have somewhat different spec. 

 

Can someone help?

 

 

Mojiime

[pmover]

The gas turbine manufacturer generally provides the fuel spec, in this case, processed gas.  If the source of gas is from a gas transmission pipeline, this gas is typically of sales quality (i.e. high methane content).  FYI, pipeline companies that utilize gas turbine driven gas compressors will use the pipeline gas to power the gas turbines.  You should be able to contact the pipeline transmission company and request a typical gas composition of gas in the pipeline.  Good luck!

-pmover

[colt16]

This is the domain of the vendor.  You could provide a composition of the gas which is intended to be purchased or from plant to be used with the gas turbine and they determine the output or if the gas is not suitable.

 

You typically have to watch out for dew point for your gas conditions.

[Mojimee]

Thank you for your comments.

This actually is for process modelling for my work on Intensified gas processing. I was looking at getting a typically spec. for processed gas used downstream as fuel for turbines for electricity generation (emphasis on natural gas utilization). I will appreciate also any useful material or reference. 

 

Regards

 

Mojiime

[gegio1960]

not very sure what you're asking for, but... basically you can feed any kind of gas to a turbine, provided that:

- H2S, CO2, H2O... are practically removed, for corrosion reasons

- C4+ are limited, for dew point reasons

- N2 is limited for combustion/emission reasons

- dust is not acceptable for mechanical reasons

....after that, GT model and burners will be selected on the base of few parameters

- gas flowrate

- gas molecular weight and heating value (and wobbe index)

... for this reasons, the raw gas to be fed to GTs is generally pre-treated in a so-called Fuel Gas Treatment plant (a typical package unit)

[Mojimee]

not very sure what you're asking for, but... basically you can feed any kind of gas to a turbine, provided that:

- H2S, CO2, H2O... are practically removed, for corrosion reasons

- C4+ are limited, for dew point reasons

- N2 is limited for combustion/emission reasons

- dust is not acceptable for mechanical reasons

....after that, GT model and burners will be selected on the base of few parameters

- gas flowrate

- gas molecular weight and heating value (and wobbe index)

... for this reasons, the raw gas to be fed to GTs is generally pre-treated in a so-called Fuel Gas Treatment plant (a typical package unit)

Thank you for your response,

I was asking for the typical minimum %mole composition specification for H2S. CO2, N2, H2O, Hg, NCL etc for a processed gas stream met for feed to gas turbine. Will I be right to use the typical sales gas spec.