The kinetic simulation of the methanol reactor in MATLAB showed that axial dispersion phenomena are negligible and the effect of the global heat exchange coefficient on reactor performance is less important than the effect of isothermal heat exchange fluid temperature.

In addition, the use of pure CO 2 and H 2 in the feeding stream allows an overall reaction enthalpy change lower than that obtained by the use of syngas in the feed. Specify required values of temperature, pressure, flowrate and chemical concentration. Results show that at equilibrium conditions a reactor with the recycle of unconverted gases ensures the highest CO 2 conversion: 69% at 473 K and 55 bar. The overall process for this simulation is to Select a thermodynamics package that describes the physical and chemical properties of the chosen chemicals Select the pipe segments and unit operations Define all required inputs and output streams. An adiabatic kinetic reactor with recycle of unconverted gases was considered and simulated in Aspen Plus®, while the performance of a methanol reactor with heat exchange at the pipe wall was simulated in MATLAB. An additional important feature of this work was the development of a methodology that assists in comparison of different process schemes by simulation of two different methanol plants configurations in ChemCad®. Three novel reactor configurations at equilibrium conditions were considered: once-through reactor, reactor with recycle of unconverted gases after separation of methanol and water by condensation reactor equipped with membrane permeable to water. In this research, an equilibrium analysis of a methanol reactor with pure CO 2 and H 2 in the feeding stream was developed. In the last years, interest was growing in the production of methanol from CO 2, based on the so called “Power-to-Fuel” concept. Methanol is a very valuable chemical with a variety of uses, either as a fuel or as building block for the synthesis of other chemicals.

Pd-plus chemical process simulation