92168.pdf
1 1 2 Liquid-gas and liquid-liquid interfaces Many of the proteins from which these films can be formed are approximately spheri ...
Liquid-gas and liquid-liquid interfaces 113 interaction one component displaces the other, usually at the collapse pressure of t ...
114 Liquid-gas and liquid-liquid interfaces of the cell membrane to specific metabolites, however, requires modification of the ...
5 The solid—gas interface Adsorption of gases and vapours on solids When a gas or vapour is brought into contact with a clean so ...
116 The solid-gas interface Physical adsorption^2 '^3 '^6 *"^4 and chemisorption^2 •^65 ~^68 The forces involved in the adsorpti ...
The solid-gas interface 117 150 ~9 o</> "Oa aCD 100 0.2 0.4 0.6 0.8 1.0 Pressure/10^5 N rrr^2 Figure 5.1 Adsorption isothe ...
! 18 The solid-gas interface Dissociation energy of X2 Activation energy for chemisorption X+X p Distance Heat of physical adsor ...
The solid-gas interface 119 physical adsorption and chemisorption curves, and varies widely from system to system; for example, ...
120 The solid-gas interface The adsorption of a gas or vapour can be measured by admitting a known amount of the adsorbate into ...
The solid-gas interface 121 but this technique has largely been superseded by the use of beam- type vacuum microbalances. An alt ...
122 The solid-gas interface PO PO PO PO PO Figure 5.5 Brunauer's classification of adsorption isotherms (pn ~ saturated vapour p ...
The solid—gas interface 123 diameters usually being between 2 nm and 20 nm. The upper limit of adsorption is mainly governed by ...
124 The solid-gas interface solid, it may reflect a fibrous structure, or it may be the result of compaction of particulate soli ...
The solid-gas interface 1 25 concave liquid- vapour interface and, therefore, a lower vapour pressure in the capillary than it w ...
126 The solid-gas interface Desorption Adsorption Figure 5.8 A hysteresis loop in physical adsorption these circumstances, be lo ...
p = 2y cos 91 r The solid-gas interface 127 (5.4) If all the pores are equally accessible, only those for which r is greater tha ...
128 The solid—gas interface Isotherm equations Numerous attempts have been made at developing mathematical expressions from post ...
The solid-gas interface 129 where k is a proportionality constant - i.e. VIV (1-V/VJ where AJ/ads. = E~ E' = heat of adsorption ...
130 The solid-gas interface .2 1000 OL 800 OTO 600 400 200 0.4 0.6 0.8 Pressure/ 105 Nm~^2 Figure 5.10 Langmuir plots for the ad ...
The solid-gas interface 131 The BET equation for multimolecular adsorption Because the forces acting in physical adsorption are ...
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