[BMCombustor]

Hi All,

I am trying to model pure coal combustion in Fluent but I do not know how to calculate Volatile Molecular Weight (Kg/Kmol) using Proximate and Ultimate Analysis. I can calculate mass fraction of C, H, O and N in volatile but I do not know how to use them to get x,y,z and w in CxHyOzNw. Do you have any idea to help me out?

Thanks

[mehulkumar]

Hi,

Molecular Weight of compound can be computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

[BMCombustor]

Originally Posted by mehulkumar

Hi,

Molecular Weight of compound can be computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

Thanks, but the problem is that I do not know the chemical formula and I'm looking for a way to find it. Let me clarify my case: I have 35.61 gr of volatile which is composes of C, H, N, O and S. I know the fraction of each substance as 20.22 gr of C, 4.77 gr of H, 1.54 gr of N, 7.78 gr of O and 1.3 gr of S. Now, I want to know the molecular weight of my volatile or in other word the coefficients of CxHyNpOqSr. Any idea?

[mehulkumar]

Hi,
You may get hint from this link:

https://www.sharcnet.ca/Software/Flu...oal_inputs_pdf

Mehulkumar

[souza.emer]

Old post but who knows right?

Take a look at this topic from this work, very good one.

Alganash, Blaid Sasi Abozeid (2015) Numerical investigation of the
combustion processes of various combustion regimes. PhD thesis.

[Ashrsfab.E]

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