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[b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]

[b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]

[b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]


Hi Friends,

I need information about the n-butane number" (NBN) used to rate a fuel gas knock resistance for SUPERIOR gas engines.

I would like to know if there is any calculation method available, and how I could obtain it.

I will appreciate it, Thanks

Saludos !!!!!

RE: [b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]

Monagas -

     How the normal butane number was developed is described in this paper:
"A Procedure for Calculating Fuel Gas Blend Knock Rating for Large Bore Gas Engines and Predicting Engine Operation"  by F.S. Schaub and R.R. Hubbard.  American Society of Mechanical Engineers, 85-DGP-5, 1985.  Presented at the Energy-Sources and Technology Conference and Exhibition, Dallas, Texas.  February 17-21, 1985.


RE: [b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]


Ok Mr. Prometheus, thank you very much.

Do you know how could I get that paper.

I'm not in the USA, and I would like to buy it, via internet
if you have more information about it, I will appreciate it a lot.

My best regards !!!!!

RE: [b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]


      We get our copies of old papers by contacting the school library at Purdue University in Lafayette, Indiana.  They will charge you a small fee (~ $15, plus postage) for a hardcopy of the paper.  

      The ASME website does not appear to have papers that old available.

      The company that made the engine should have such info too.  I checked on the web and found that Superior engines were probably made by Cooper-Bessemer.  See  http://www.coopercameron.com/cgi-bin/corporate/news/ccc_history.cfm


RE: [b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]

Interesting, I did not know there was so much to the fuel gas requirements.  I have not had to worry about the gas value as we have "pipeline" gas for fuel.

A correction on the Superior engines, they were originally made by White-Superior, and then when White had problems Superior was sold to Cooper, in the 80's I think.  The time line gives the start date of all the original companies that are now in the Cooper company.

As Superior is almost a dead company, a couple of aftermarket companies may have more information.  Sinor Engine, and EnDyn both support the Superior engine aftermarket.

If the BTU value, or the LHV doesn't swing too much I would think you could adjust the engine to run correctly.

Can you expound on your problems more?

Hotrod Big Engines!
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RE: [b]NBN Normal Butane Number, Fuel Gas Knock Resistance[b/]

All right Mr. Dwedel,I Know what are you talking about.

 I have designed a fuel gas plant for a gas compression plant.

I found old data sheets of fuel gas specifications for Superior engines, they state the NBN as an antinock rating. rather than the HHV or LHV. My simulations shows good results about these parameters.But I want more information about NBN.

We have been operating good, but we want more.
We want to improve the performance of the engines at 100 % of load.

Thanks for your post

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