Help understanding an experiment set up

[dRic2]

Hi, I'm reading a paper about combustion and I can't understand the composition of the inlet mixture. Here's what the paper says:

"A known flow rate of the isobutene (Matheson, TriGas, 99.5%) in nitrogen (General Air, 99.998%) was introduced into a 6mm ID quartz reactor that was heated in an electric furnace..."

I need to calculate the mole fraction of isbutene, O2, and N2 but I don't understand the above sentence. Any suggestion would be of great help!

PS. isobutene = isobutylene

PSS: I find very strange that in a combustion experiment is not mentioned the amount of O2 in the mixture... Maybe I'm overlooking something, but I didn't find anything else in the paper

PSS: I forgot an important part: there is a line that says "N2/iC4H8 = 50/50 % mol"

 

[DrClaude]

Can you give the reference?

 

[Lord Jestocost]

I find very strange that in a combustion experiment is not mentioned the amount of O2 in the mixture... Maybe I'm overlooking something, but I didn't find anything else in the paper

Check whether the paper is about "combustion" or "pyrolysis".

 

[dRic2]

Check whether the paper is about "combustion" or "pyrolysis".

Oh, I'm an idiot...

It says pyrolysis so no O2 is needed, then I assume the inlet mixture is just 0.5 isobutene and 0.5 N2, right ?