Topic
Vapours
About: Vapours is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 15022 citations.
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01 Nov 2015
TL;DR: Zandavi et al. as discussed by the authors used the Zeta adsorption isotherm (ZAI) to predict the cluster distributions in the adsorbed phase of the liquid phase.
Abstract: Vapours adsorption on non-porous and porous solids: Zeta Adsorption Isotherm Approach Seyed Hadi Zandavi Doctor of Philosophy Graduate Department of Mechanical and Industrial Engineering University of Toronto 2015 The Zeta adsorption isotherm, ZAI, has been extended so it may now be applied to describe the adsorption of molecularly adsorbed gases, of dissociatively adsorbed gases, and of vapours. This isotherm assumes, as a hypothesis to be tested, that the adsorbates consist of differently sized clusters. The ZAI theory is used to derive an expression for predicting the cluster distributions in the adsorbed phase. Cluster distribution predictions are a unique feature of ZAI and they are not available from other adsorption isotherms. For vapours, this isotherm supposes that an adsorbate at pressures less than the saturation-vapour pressure, Ps(T ), consists of molecular clusters with 1, 2, 3 · · · up to a limited maximum value of ζm molecules. Since ζm is bounded, we show that ZAI has no singularities for any pressure. This allows the adsorption of vapours at pressures greater than Ps to be investigated. The cluster distribution predicts the formation of an adsorbed film at a vapour phase pressure greater than Ps. Further, the ZAI is combined with Gibbsian thermodynamics to obtain an expression for the surface tension at the solid-vapour interface, and a method has been proposed for determining the conditions at which an adsorbed vapour becomes an adsorbed liquid. For molecularly gas adsorption, the same procedure is applied; it is found that ζm is unity, meaning there is no clustering. When the same procedure is applied for dissociative
4 citations
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TL;DR: In this paper, a mixture of small primary particles, Fe 2 O 3 as well as soot particles have proved to be good condensation nuclei for condensation of silver vapours.
4 citations
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17 Feb 1937
TL;DR: In this article, the authors describe a method for the selective removal of certain gases or vapours from a mixture of gases by passing the gases through adsorbent solids such as active charcoal or silica gel.
Abstract: This invention is for improvements in or relating to the treatment of gases with adsorbent solids and has particular reference to the selective removal of certain gases or vapours from a mixture of gases by passing the gases through adsorbent solids such as active charcoal or silica gel. During...
4 citations
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4 citations
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21 Apr 1989
TL;DR: In this article, a process for the production of fine silicon carbide grains, having a submicronic average size and a specific surface at least equal to 100 m g, is described.
Abstract: The invention relates to a process for the production of fine silicon carbide grains, having a submicronic average size and a specific surface at least equal to 100 m g , intended especially to be used as a catalyst support for petrochemistry, this process consisting in reacting silicon monoxide SiO vapours with carbon According to this process: - SiO vapours are generated in a first reaction region by heating an SiO2 + Si mixture, at a temperature between 1100 and 1400 DEG C, at a pressure between 01 and 15 hPa; - the SiO vapours are brought into contact, in a second reaction region, with the reactive carbon, in the divided state, with a specific surface at least equal to 200 m g , at a temperature between 1100 and 1400 DEG C
4 citations