PDF Publication Title:
Text from PDF Page: 047
breakthrough time when compared with the H2/CH4 binary mixture, although the difference related with the axial dispersion persists. Pressure Swing Adsorption for Hydrogen Purification 1 0,95 0,9 0,85 0,8 0,75 0,7 sim. 4 atm exp. 4 atm sim. 10 atm exp. 10 atm sim. 16 atm exp. 16 atm 600 800 1000 1200 1400 time (s) 0 200 400 1 0,95 0,9 0,85 0,8 0,75 0,7 sim. 4.5SLPM exp. 4.5SLPM sim. 6.8SLPM exp. 6.8SLPM sim. 9.1SLPM exp. 9.1SLPM 400 600 800 1000 1200 1400 time (s) 0 200 Figure 4.7 – Effect of the feed pressure at a feed flow rate of 6.8 SLPM on the left and effect of the feed flow rate at a feed pressure of 10 atm on the right in the breakthrough for a binary mixture of hydrogen and carbon monoxide When the variable being analysed is the feed flow rate (Figure 4.7) it is possible to observe a better agreement between experimental and simulation results. However, the difference between slopes for the lower feed flow rate still is slightly different. For different feed pressures it is possible to observe from Figure 4.7 that for higher pressures the deviation between experimental and simulation results is higher than for lower pressures. The difference observed between breakthrough times for the feed pressure of 16atm is of60s. However, the results obtained for this mixture present more resemblance when comparing with the results obtained for the H2/CH4 mixture. Taking into consideration that the previous results showed that the resemblance between experimental and simulation profiles was influenced by the components composing the feed mixture, it was decided to simulate the breakthrough for a binary mixture of hydrogen and carbon dioxide. According to the information present in chapter two, carbon dioxide adsorbs strongly in the zeolite layer, requiring extremely low pressures in the purge step. For this reason, the knowledge of the behaviour of this component on the adsorption bed is very important to avoid the concentration wave of carbon dioxide to reach the zeolite layer. The breakthrough curve obtained for the binary mixture containing hydrogen and carbon dioxide showed a large difference when compared with the experimental data as can be seen in Figure 4.8.The difference obtained between breakthrough times was much higher than the observed for the other binary mixtures studied previously. With the purpose of finding the problem with the model, the loading profile across the column was analysed in order to have some insight on what was happening inside the adsorption bed. The loading profile was Modelling and Simulation 27 molar fraction (H2) molar fraction (H2)PDF Image | PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN
PDF Search Title:
PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGENOriginal File Name Searched:
32541.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 (Standard Web Page)