PDF Publication Title:
Text from PDF Page: 049
3.2. Adsorption performance of structured adsorbents 33 broader than for the 400 and 900 cpsi structured adsorbents, indicating a greater resis- tance to mass transfer in the beads due to the long diffusion path (large radius of the beads, 0.7 mm). These results indicate that the adsorbent grown in the clear solution on the 400 cpsi support is better than the one grown in the gel or in the clear solution on the 900 cpsi cordierite monolith. The breakthrough front for the former sample was very sharp indicating an ideal flow patterns and effective mass transfer and at the same time, the adsorption capacity was significant. Figure 3.13 shows the NO2 breakthrough curves determined at 30◦ C for the about 1.9 μm thick ZSM-5 films grown in the clear solution in steps of 48 h and 96 h, and in the gel for 12 h on 400 cpsi supports. The time to reach 50% of the final concentration occurred after ca. 300 and 500 s for the ZSM-5 films grown in the clear solution in steps of 48 and 96 h, respectively. The film grown in steps of 96 h thus has higher NO2 adsorption capacity than the one grown in steps of 48 h. The higher adsorption capacity of the former sample was assigned to the higher zeolite loading and higher Al content. The time to reach 50% of the final concentration occurred after ca. 1000 s for the film sample grown in the gel, indicating high NO2 adsorption capacity due to the higher zeolite loading and low Si/Al ratio. In addition, the broader breakthrough curve of the ZSM-5 film grown in the gel, as compared to the ones of the films grown in the clear solution, might be due to a reduced effective diffusivity due to the increased Al concentration (and thus Na ions) and an increased mass transport resistance in the sediments compared to the films grown in the clear solution, as discussed earlier. Figure 3.13: Experimental NO2 breakthrough curves measured at 30◦ C for the structured ZSM- 5 adsorbents with a thickness of 1.9 μm grown in the clear synthesis solution and in the gel on 400 cpsi monoliths. The NO2 adsorption capacity was calculated by integrating the adsorption data andPDF Image | Structured Zeolite Adsorbents for PSA Applications
PDF Search Title:
Structured Zeolite Adsorbents for PSA ApplicationsOriginal File Name Searched:
structured-zeolites.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |