PDF Publication Title:
Text from PDF Page: 135
The position of the CO2 mass transfer front at the end of this step is controlled by monitoring the concentration of CO2 in the exit gas and adjusting the exit flow rate. In the second step, the bed is evacuated counter-currently and the bed pressure at the end of this step is controlled by adjusting the valve leading to the vacuum pump. In the third step, N2 is used to re-pressurize the bed to feed pressure in a counter-current direction. The CO2 recovery and purity is calculated to characterize the VSA performance using different adsorbent structures. The CO2 recovery is calculated as number of moles of CO2 recovered in the desorption step 2 divided by the number of moles fed to the bed in step 1. The CO2 purity is determined as number of moles of CO2 recovered in step 2 divided by the total number of moles recovered in step 2. These simulations were performed to explore the behaviour of the different adsorbent structures in particular to judge the merits of structured adsorbents at short cycle times, which corresponds to high flow rates. The physical properties of the adsorbents considered in the simulations are summarized in Table 4. It is worth noting that the three step cycle tested here is not indicative of the typical cycle which would be used in an industrial CO2 capture plant 30. However, the major steps of adsorption and desorption (regeneration) are captured, which is sufficient in order to demonstrate the impact of adsorbent structure on VSA performance. Thus we expect the trends observed here to be similar for more complex cycles. 4. Results and discussion 4.1 Materials development Figure 2 shows a cross-sectional image of the NaX beads. It is possible to identify the typical octahedral shape of NaX crystals with a size up to a few micrometers. Figure 3 (a) shows a top-view SEM image of sample C5400 31. The films appears to be well intergrown and typical NaX crystals with octahedral habit and with a size ranging from about 0.6 to 2 119PDF 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 |