(a) For the follwing set of reactions, use a balance on atomic species (as devel

Question

(a) For the follwing set of reactions, use a balance on atomic species (as developed in the handout) to determine all possible independent reactions.

CH4 + CO2 <-----> 2CO + 2H2

CO + H2O <-----> CO2 + H2

CH4 + H2O <-------> CO + 3H2

CH4 + 2H2O <-------> CO2 + 4H2

In your work, use the orders CH4, CO2, CO, H2, H2O for molecular species, C, H, O for molecular species.

(b) Choose a set of independent reactions from the set of reactions provided above, and show how you can get that specific set from your solution for part a.

Explanation / Answer

The 3 elements C, H and O mak 5 molecular compounds, CO2, CO, CH4, H2 and H2O, there´s a relationship

Number of independent reactions = number of independent reacting species - number of independent reacting components.

For this particular case Number number of independent reactions = 5 - 3 = 2 independent reactions

B) the independent reactions from the set provided are number 1 and 2, if we add number 1 and 2 we will get equation number 3

CO + H2O <-----> CO2 + H2

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CH4 + H2O<-----> CO + 3H2

If we take equation 1 and 2 times equation 2

CH4 + CO2 <-----> 2CO + 2H2

CO + H2O <-----> CO2 + H2

-----------------------------------------------------

CH4 + H2O<-----> CO + 3H2

If we take equation 1 and 2 times equation 2

CH4 + CO2 <-----> 2CO + 2H2 2CO + 2H2O <-----> 2CO2 + 2H2 ---------------------------------------------- CH4 + 2H2O <-------> CO2 + 4H2

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