Calculations on the combustion of mixed components
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A mixed composition is currently burning in the burner; the fuel gas is this mixed component, while the oxygen comes from air. I now want to know the temperature after combustion; which model do you think is suitable? If a Gibbs reactor is used, the reaction temperature or heat of reaction must be entered, both of which are unknown. If a stoichiometric reactor is used, all reactions need to be defined, but this seems impractical due to the complexity of the components. Let’s all think of a way
By the way, the calculations are done using the Aspen model
This post was last edited by vrain on 2016-10-8 at 17:18. I suddenly thought: by setting the duty to 0 and using Gibbs’ law, why is the calculated value so far off from the actual value? The difference is 1,000 degrees – could this be due to setting it to adiabatic combustion?
Gibbs’ reaction yields a mess as a result; a stoichiometric reactor is somewhat more reliable. Setting the duty to 0 is the right approach. If the calculations give incorrect results, there could be several reasons: 1. The products are incorrect； 2. Actual heat exchange with the environment ； 3. The temperature exceeds the range of Aspen’s heat capacity expression, etc
There are too many reactions that need to be defined for a metering reactor, and some of these reactions cannot be determined
Then try Gibbs, get rid of the unreliable outputs, and see what happens