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: In this paper , two 2-(2-hydroxy-5-methyl) benzothiazole (HBT) derivates were designed and synthesized for ratiometric detection toward amine vapours and ammonia.
12 citations
Journal Article•
TL;DR: In this paper, the influence of volatile organic compound vapours of TiO2 gas-sensing layers prepared via the sol-gel technique was investigated in the environment of alcohols, aliphatic and aromatic compounds.
Abstract: The influence of volatile organic compound vapours of TiO2 gas-sensing layers prepared via the sol-gel technique was investigated. The sol-gel-derived layers were tested in the environment of alcohols, aliphatic and aromatic compounds. Specified organic compounds caused reversible changes of the semiconductor film resistance. The response of the titania film was registered as current intensity changes versus time at different sensor operating temperatures. The results suggested that TiO2 films prepared by the sol-gel technique can be used as chemical sensors.
12 citations
TL;DR: In this paper, the authors compared the diffusive transport of BTEX vapours through a sand layer of high moisture content, where biodegradation occurred, with diffusion through air-dried sand.
Abstract: The single-ring aromatic hydrocarbons benzene, toluene, ethylbenzene and m-xylene (BTEX) are common and dangerous pollutants in subsurface environments. The diffusive transport of BTEX vapours through the unsaturated zone of the ground is a potential health hazard to humans, living in the vicinity of petroleum fuel contaminated sites. Past studies have shown that gas transport through the vadose zone can be influenced by moisture content due to variations in gaseous permeability, phase partitioning and aerobic biodegradation. In this particular study laboratory soil column experiments were employed to compare the diffusive transport of BTEX vapours through a sand layer of high moisture content, where biodegradation of BTEX compounds occurred, with diffusion through air-dried sand. The presence of a thin soil layer of high moisture content reduced the gaseous concentrations of benzene and toluene and stopped the migration of ethylbenzene and m-xylene vapours, demonstrating its efficiency as a barrier on the diffusive transport of BTEX vapours in unsaturated soil.
12 citations
TL;DR: In this paper, the gas phase laser Raman spectra of arsenic and sulphur mixed vapours were investigated as a function of composition and temperature up to 800 °C, and the results suggest the presence of As 4, As 4 S 3, AS 4 S 4 and As 2 S 2 in the vapour.
12 citations
TL;DR: In this article, the authors formulated and solved condensation of vapours on a vertical fin in the presence of non-condensable gas, making use of the analogy between heat and mass transfer, and rendered numerical results from the analysis into dimensionless equations that can be used to predict the mean condensation heat transfer coefficients.
12 citations