PDF Publication Title:
Text from PDF Page: 050
34 Results and discussion the result is given in Table 3.5. The adsorption capacity at 30◦ C of the film samples is varying between about 400 and 1400 μmole/gzeolite and reflects the zeolite loading and the Al and Na content, and is highest for the sample grown in the gel, which has the highest Al and Na concentration, see Table 3.2, as well as the highest zeolite loading. The adsorption capacity observed at 30◦ C mostly stems from weakly adsorbed NO2 on the cations in the zeolite [57], see Paper C for more details. At higher temperature (200◦ C), the specific amount of NO2 was nearly independent on the Si/Al ratio of the ZSM-5 films, see Table 3.5, illustrating that an increase in Al concentration in the films increases only the physisorption of NO2. Table 3.5: NOx adsorption data for the 1.9 μm ZSM-5 films grown in steps of 48 h, and 96 h in the clear solution, and in the gel for 12 h on 400 cpsi supports. Sample ZSM-5 film grown in the clear solution in steps of 48 h ZSM-5 film grown in the clear solution in steps of 96 h ZSM-5 film grown in the synthesis gel Si/Al Na/Al NO2 adsorbed μmole/gzeolite 30◦ C 200◦ C 367 5.7 416 101 178 3.2 516 161 14 0.9 1401 162 3.2.3 Simulated VSA performance, Paper D The VSA performance for the adsorbent comprised of a 1.5 μm zeolite NaX film grown on a 400 cpsi cordierite monolith was simulated using the MINSA software. An ideal 900 cpsi structured adsorbent having the same breakthrough front as the 400 cpsi structured adsorbent and only shifted in time because of the higher zeolite loading, was also con- sidered in the simulations. The performance of the structured adsorbents was compared with that of beads with a diameter of 0.7 mm. Figure 3.14 illustrates that the product purity obtained with a bed of NaX beads is higher than that for the 400 cpsi adsorbent and the ideal 900 cpsi adsorbent. This can be attributed to the higher voidage and lower zeolite loadings in the monolith structures. The channel voids in the structured adsorbents lead to significant contamination of the product with N2. Figure 3.14 also shows that for all cases, a plateau value of product purity is reached at large cycle times. This is due to the reduction in gas velocity resulting in a sharper mass transfer front and hence improved CO2 purity. The product purity forPDF 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 |