PDF Publication Title:
Text from PDF Page: 090
to provide the vacuum (in a microtorr range) on the shell side. Initially, the membrane was dried by exposure to a microtorr vacuum overnight to ensure that the level of hydration correctly corresponded to the experimental rela- tive humidity. A gas stream was then fed to the tube side of the vacuum at 5 slpm for a particular relative humidity until no measurable change in pressure on the shell side occurred within 10 minutes, at which time measurements were made of the relative humidity and temperature of the tube-side fluid stream at the tube inlet and outlet and the pressure at the tube inlet along with the temperature and pressure of the fluid exiting the shell during an hour-long interval. At the end of the interval, the feed stream flow rate was increased and the experiment was repeated for tube-side flow rates of 8 and 10 slpm. When relative humidity, temperature, and pressure data had been collected for all three flow rates, the membrane was exposed to a microtorr vacuum overnight and the procedure was repeated the next day for a different relative humidity. All experiments were performed at room temperature (∼24◦C). 5.3 Theory We examine the transport of water from inside a shell and tube membrane module with a vacuum on the shell side as an alternative to a purge gas. A repre- sentative schematic of the membrane is shown in Figure 5.2. A sample gas intended for dehydration is fed to the tube side at a specified total mass flow rate, ωt, and mass fraction of water, x. As the sample gas flows down the length of the membrane, water permeates from the tube side through the membrane to the shell side. In our model, we assume that the permeation rates of nitrogen and oxygen are insignificant compared with that of water based on the values measured by Gode et al.3 We also measured permeation rates of oxygen and nitrogen under dry conditions through the membrane used in the experiments and found them to be very low 1.04×10−10 and 2.2×10−11 mol/ m s kPa, respectively, for a pressure gradient of 140 kPa. We also as- 78PDF Image | TEMPERATURE SWING ADSORPTION COMPRESSION AND MEMBRANE SEPARATIONS
PDF Search Title:
TEMPERATURE SWING ADSORPTION COMPRESSION AND MEMBRANE SEPARATIONSOriginal File Name Searched:
temp-swing-adsorption.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)