Regeneration modes

One alternative regenerating procedure involves the sequential aspiration of the sample and regenerating carrier (Fig. 2.17.B.2), which requires actuating the switching valve in order to restore the sensor. It allows larger sample volumes to be used in order to raise the analyte concentration at the active microzone when highly dilute samples are to be processed (e.g. see [19]). 

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Reactor A is shown in operating mode. Reactor B is in regeneration mode. 

Suppressor Source Continuous Solvent compatible Capacity Regeneration mode Ion type Regenerant source... 

The regeneration process results in the chemical reduction of the adsorbed NO compounds into nitrogen and water vapor. To accomplish the catalyst regeneration in an oxygen-free environment, the system is composed of several separate modules which are alternatively absorbing NO or operated in the regeneration mode. 

Figure 2.18 shows the most relevant and/or usual types of transient signals provided by the flow-through (bio)chemical sensors used in the continuous configurations depicted in Figs 2.12-2.16 and the regeneration modes illustrated in Fig. 2.17. The two sequential steps (1 and 2) affecting the sensitive microzone of the flow-through sensor are distinguished.

M(n+1)+. For oxygenation involving oxometal species, M(" 2)+o, the regeneration mode in the catalytic cycle is substrate oxidation via equation 6. Occasional side reactions with M-based or other redox active species can lead to the intermediate oxidation state of the catalyst, Equations 9-12 are routes to in the... 

Figure 6 demonstrates the same point by con aring the MgO based trap to the Barium Titanate lab prototype. Again loss of performance in the presence of sulfur is observed. For these experiments SO2 gas was used to effect the sulfation during the regeneration mode of cyclic deactivation. SO2 gas may also be bled into the system dxiring the Transfer Method experiment allowing sulfur to directly con ete with trap sites as in the above two studies. 

Global Regenerator Mode) Mixing cell framework. 

Periodic catalyst regeneration or carbon burn off is required to maintain the activity of the catalyst. Typical cycle time is reported to be at least 8 hr, with 7 hr of process time and 1 hr of regeneration time. For continuous operation, various furnace modules can be operated such that, for example, seven operate in the process mode while one is in the regeneration mode. Fig. 13 shows a schematic diagram of a STAR process unit. ... 

Takeuchi, H., Takahashi, K., Nakano, M. (1990). Separation of heavy metals from aqueous solutions by hoUow-fiber type supported liquid membranes in a continuous regenerating mode. Water Treatment, 5, 222-36. 

Table 7.5 shows the advantages and disadvantages of the various regeneration modes. 

While one bed is in the adsorption mode, another is in the regeneration mode. 

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