Membrane modules temperature profiles

The temperature profiles for both feed and sweep sides are shown in Figure 9.13 with a maximum for each profile. Since the overall module was adiabatic, the feed gas was heated by the exothermic WGS reaction. The highest feed-side temperature was 158 °C at about z = 15 cm. Beyond that, the feed-side temperature reduced, and it became very close to the sweep-side temperature at the end of membrane reactor. This was due to the efficient heat transfer provided by the hollow-fiber configuration. 

In the study of an open architecture, two WGSRs with a membrane module separating them were employed. In both cases, the membrane permeation surface was assumed to be the same. However, the temperature profiles were different in the closed architecture, the temperature along the membrane... 

The data in Fig. 11.5 clearly demonstrates the beneficial effect of the membrane the final CO conversion value is even higher than before, reaching a value of about 90%. This result is likely to be due to the effect of temperature, for which maximum values are assumed here, with an isothermal profile. The assumptions made on the basis of this model will bear a close resemblance to the real situation, where the physical separation of the reactor module by the membrane module allows easy control of the heat losses, thereby achieving a fairly constant temperature. 

Sample connections, together with pressure, temperature and flow measurement points, are located at the inlet and outlet of the reformer and membrane modules to measure the performance of the RMM. A multipoint thermocouple is installed inside the first reformer tube in order to monitor the axial temperature profile along the heated catalyst length while two glass peepholes allow the reformer tube metal temperature to be measured by an infrared pyrometer. The control room is located in a safety area with a bird s eye view of the plant area. 

Figure 12.18 Temperature profile along a plate-and-fiame TF200 membrane module working under SGMD configuration. (Feed liquid velocity 0.15 m/s air velocity 1.5 m/s). (Adapted from Khayet et al., 2000a.)...

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