During adsorption

In normal plant operation at least two adsorption purifiers are employed—one in service while the other being desorbed of its impurities. In some cases there is an advantage in using an additional purifier by placing this unit in series with the adsorption unit to provide a backup if impurities are not trapped by the first unit. The cooling of the purifier must be effected with some of the purified gas to avoid adsorption during this period. 

The Au/Ti02 catalyst shows activity for photocatalytic dehydrogenation of 2-propanol at 298 K. The activity of Au/Ti02 is attributed to its unique capability for producing photogenerated electrons evidenced by the featureless IR adsorption during UV-irradiation. 

Fig. 12 Typical trajectory at 100 K, a side views showing adsorption during the initial stage of adsorption and at the late stage of 1280 ps, and...

Note that the product /A yields the scan rate of the square-wave potential modulation. If the delay period is sufficiently long, the additional adsorption during the potential scan is negligible. Otherwise, the additional adsorption complicates the theoretically expected dependencies, in particular the relationships between the net peak currents and potentials on the frequency [114]. 

A summary of developments in physical adsorption during the period from 1943 to 1955 has been given recently by Everett 94). The chief difference between the approach used by Brunauer in his book published in 1943 and that in vogue in 1955 is in the great development of the thermodynamic aspects of the subject. Prior to 1943, the main effort was in developing theories to predict the shape of adsorption isotherms. Since then, emphasis has shifted towards the thermodynamic properties of the adsorbed phase, particularly its entropy. 

Gelissen, I. C., and M. A. Eastwood. Taurocholic acid adsorption during non-starch polysaccharide fermentation an in vitro study. Brit J Nutr 1995 74(2) 221-228. 

If information on total metals is required, the sample must be acidified before analysis. If information on dissolved metals only is required, the sample may be filtered (using a specified pore size) before analysis. Losses may occur however, by adsorption during filtration. 

The suppression of the irreversible decrease in conductance under these experimental conditions was ascribed to the adsorption, during the first heating period, of the oxygen left in the pores of the sample, when the sample was heated to the higher temperature. 

Adsorption during washing of Pt6Cl, 2 with water. 

Artifacts from the resin can interfere with the chromatographic analysis of the XAD resin extract. For example, the artifact may be a pollutant being studied, or coelution of the resin artifacts and compounds of interest may occur during capillary gas chromatographic (GC) analysis. Artifacts can also take part in competitive adsorption during sampling. This situation can cause sample breakthrough because certain compounds are preferentially collected. 

Tamaru, K. Trans. Faraday Soc. 55 (1959) 824. Adsorption during the catalytic decomposition of formic acid on silver and nickel catalysts. 

Calculated from molecular sieve weight increase during adsorption assuming only oil and wax adsorbed. This calculation ignores water adsorption during molecular sieve transfer and adsorption of solvent. Consequently, these values are low. 

Strano MS, Moore VC, Miller MK, Allen MJ, Haroz EH, Kittrell C, Hauge RH, Smalley RE. The role of surfactant adsorption during ultrasonication in the dispersion of single-walled carhon nanotubes. Journal of Nanoscience and Nanotechnology 2003, 3, 81-86. 

Precautions should also be taken with the aqueous solvents used to prepare standard working solutions in order to avoid adsorption problems, especially at low concentrations. To minimize adsorption during standard curve and validation sample (VS)/QC preparations, aliquots of the high-concentration stock solutions should be spiked promptly into the control blank plasma to prepare the standards and VS/QC. Once the compounds are in an environment of protein solutions, the adsorption problem is negligible. If there is a problem, however, adding or pre-rinsing with a solution of protein or a chaotropic agent (e. g., Tween, Triton X-100 or CHAPS) may help to alleviate the problem. 

Ognier, S., Wisniewski, C. and Grasmick, A. (2002) Influence of macromolecule adsorption during filtration of a membrane bioreactor mixed liquor suspension. Journal of Membrane Science, 209, 27-37. 

FIGURE 2.21 Changes in weight, volume, BET surface area, and water vapor adsorption during the carbonization of poly(furfuryl alcohol) to form glass-like carbon. (Courtesy of Dr. S. Yamada, Tokai Carbon Co. Ltd., Shizuoka, Japan. With permission.)... 

A dissociative adsorption during which both CP and a H atom are adsorbed on the catalytically active surface ... 

In principle one should even be able to determine the extent of substrate adsorption during the course of the reaction itself, provided an appreciable fraction of the reactant is adsorbed. If the experimenter knows the initial reactant concentration, a, and can measure both its bulk concentration, c, at a given time as well as the concentration, x, of a non-adsorbed product, then he can calculate the number of moles of reactant absorbed from the equation... 

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