Mixing of MeOH and air to produce a mixture 10%mol MeOH
1st priority CV: keep x_MeOH at sp (8-10%mol, preferably 10%)
2nd priority CV: keep production rate at sp

MeOH is fed using a valve. The valve is composed by:
- actuator: 2nd order ODE
- valve: valve equation

Air is fed using a compressor, composed by:
- actuator: 2nd order ODE, same model as valve, different parameters
- compressor map

Mixer:
- total flow is instant, perfect

Things that someone else can improve or do:
- decouple, for the "standard" operation.
- implement a motor a actuator for the compressor.
- calculate air density as function of pressure and temperature (for compressor calculations).
- use pressures (and maybe temperature)  as disturbances. 
- improve the model for the mixer by adding some level (or pressure) controller (something that controls the hold-up). Then, there would be some dynamics of the outlet.
- improve the model of the mixer to actually represent a vaporizer; account for phase change of MeOH. This will change the dynamics of the "mixer".