Simulation Results for Methanators

In this section we check our models against two industrial adiabatic fixed-bed methanators. Along the length of the methanators we calculate the effectiveness factor from the dusty gas model (DGM) and our simplified models (A) and (B). 

Here are the design and actual operating conditions of Plant M-one  

Methanator Plant M-one construction, design, and operating conditions 

The design and actual output data from Plant M-one and the simulated results from the three models are given in the following two tables. 

---

Since the exact densities of various chemically active spjecies and their diffusion coefficients are not known, methane diffusion in argon is simulated in order to have some hints about the diffusion of various chemically active sp>ecies. Simulated results for methane diffusion in the figure 15 show that it takes about 10 to 20 ms for a chemically active sp>ecies generated in the filament, which is ap>proximately placed at the middle of the tube, to reach the tube surface. During this transpwrt process, it may imdergo several chemical reactions. Gas velocity is 1.4 m-s-i for the flow rate of 2.4 shn. Hence, in the duration of 10 to 20 ms, neutral radicals will be moved to a distance of 1.5 to 3 cm along the axis of the tube. 

---