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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TL;DR: The radially aligned nanorutile (RANR) TiO2 sensor showed high sensitivity with responses of 86.75% and 38.27% towards ethanol and methanol vapours, respectively as mentioned in this paper .
Abstract: 1D nanostructures of TiO2 have been extensively researched in chemical sensing. The need for deployment of 3D nanostructures such as flower-like and urchin-like morphology for chemical sensing is very essential. This morphology provides distinctive attributes because of the properties afforded by the micrometre and nanometre building blocks within the crystal of the nanomaterial. 3D nanostructure nanorutile titania was fabricated using a facile hydrothermal method. The gas sensing performance showed that the hierarchical morphology, high surface area, high porosity and humidity played a vital role in the sensing of ethanol vapour at room temperature. The radially aligned nanorutile (RANR) TiO2 sensor showed high sensitivity with responses of 86.75% and 38.27% towards ethanol and methanol vapours, respectively. The sensor displayed good sensitivity, reproducibility, rapid response, and recovery times towards alcohol vapours.
Dissertation•
01 Jan 1989
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01 Oct 2001
TL;DR: Theoretical model of the present work is based upon three groups of equations namely: gasdynamic equations, equations of condensation kinetics and droplets growth equations as discussed by the authors.
Abstract: Condensation of some organic vapours including ammonia, ethanol and fieon-1 1 by homogeneous nucleation of liquid droplets has been studied here during supersonic flow through convergent-divergent nozzles. Theoretical model of the present work is based upon three groups of equations namely: gasdynamic equations, equations of condensation kinetics and droplets growth equations. Modified equations for the classical nucleation rate, droplets surface tension and the thermodynamic properties of the condensing vapour are used in the present theoretical model. Generally, present model predictions show that condensation characteristics of the tested organic vapours are qualitatively similar to those of steam condensation. Also, the present study indicates that the condensation characteristics of the tested organic vapours are affected with the operating parameters such as the vapour temperature and its mass fraction. The theoretical predictions of the pressure variation along the divergent sections of such supersonic nozzles are in good agreement with the published experimental measurements of these organic vapours.
TL;DR: A comparison of the calculated conductivities, including the effects of atomic clusters, of saturated sodium, potassium, and caesium vapours, was made in this paper, showing that the dependence of the conductivity on pressure at a fixed temperature has a form which could enable the presence of clusters to be deduced without requiring an accurate knowledge of the electron scattering cross section.
Abstract: A comparison is made of the calculated conductivities, including the effects of atomic clusters, of saturated sodium, potassium and caesium vapours. It is shown that the dependence of the conductivity on pressure at a fixed temperature has a form which could enable the presence of clusters to be deduced without requiring an accurate knowledge of the electron scattering cross section.
Patent•
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16 Nov 2007
TL;DR: In this article, a retort apparatus for processing a carbonaceous feed material for the manufacture of hydrocarbon gases and vapours is described, with a heating chamber having at least one heating surface for heating the bed of carbonaceous material.
Abstract: Disclosed is retort apparatus, for processing a carbonaceous feed material for the manufacture of hydrocarbon gases and vapours, with a heating chamber having at least one heating surface for heating the bed of carbonaceous material. The device also includes at least one steam inlet for introducing steam into the heating chamber to interact with at least a portion of the bed of carbonaceous material in the chamber. Methods for the preparation of hydrocarbon vapours and gases are also disclosed.