Hi everyone,
I am doing a simulation of a real steam reforming process, i have some data of sensors and indicators and a problem has just shown up. (It is a academic project)
- I have simulated the combination of furnance and the steam reforming reactor by this way:
- A combustion reactor, which i know the inlets (T, P and composition), these inlets are: Natural gas, pre-heated air from the outside of the plant and PSA purge.
- A reformer reactor (FPR reactor with the kinetics equations os methane steam reforming).
- A cooler that transfers the heat flow to the FPR from the product exhausted gas of combustion.
+ i have supposed about 3,5% heat losses in combustiion reactor from the total heat transfer to reformer.
So, i know the temperature of the exhausted gas product of the combustion at the end of the radiant zone, i.e. the temperature after it has transfered the neccesary heat flow to the reformer. I also know that this current has about 3% v/v in oxigen, so i have thought that there is a incomplete combustion.
The problem is that the final temperature in my simulation is 1200ºC, but, i have to say that i have simulated it like a 100% conversion reactor (combustion). The temperature gauge indicates that this current may be 1020ºC.
How could i modelate it (Combustion)? I dont know what could be happening inside the furnace.
should i add the incomplete combustion reaction? or maybe i should put less than a 100% conversion in the combustion.
I don't have idea what could fit better whit the real process.
Thank you so much!
ADM