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Figure 4. Isotherm Data and Fits for Moisture on Silica Gel. The average percentage deviations for those fits are 8.8%, 12.0%, 7.9% and 2.7%, respectively. The Redlich- Peterson average error seems high due to relatively large percentage deviations for the first few points. The weighted percentage errors are 3.9%, 4.8%, 1.9% and 1%. Comments about each of these, from the best to the worst, are: 1. The BDDT isotherm essentially provides an ideal fit at low, intermediate and high concentrations. The parameters indicate that roughly 4 layers are adsorbed on the surface at saturation, and (because the others miss that, the real Henry’s law coefficient is about 4 times larger than it seems). 2. The Redlich-Peterson equation fits the data pretty well, though it unforgivably predicts that loading decreases as saturation is approached. It also under-predicts the loading at low concentrations. 3. The Langmuir isotherm does pretty well at low concentrations, as far as an empirical fit goes, but it deteriorates at high concentration, near saturation. 4. The Freundlich isotherm fails in nearly every respect. If it were the only one considered, it might look OK, but it is not. 15PDF Image | ADSORBENT SELECTION
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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
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