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, the influence of saturated vapours components of essential oils on the mechanical, optical and chemical properties of cellulose and lignocellulose materials was explored.
Abstract: Biological effects of essential oils are investigated for many years. This work is focused on exploring the influence of saturated vapours components of essential oils on the mechanical, optical and chemical properties of cellulose and lignocellulose materials. Diluted vapours of active ingredients of essential oils could be used in future to protect archives made of cellulose materials. For testing were chosen ingredients of essential oils, that showed the highest bactericidal activity. Saturated vapours of these components act on selected cellulose and lignocellulose materials for a predetermined time. From the mechanical properties were measured tensile strength, bending stiffness and compressive strength. Optical properties are represented by the colour difference ∆E and chemical properties by pH change.
1 citations
TL;DR: In this article, an indirect on-line estimation of metal vapours of Hg and Zn using YSZ-based electrochemical oxygen sensor is attempted, where change in oxygen partial pressure, in presence and absence of these metals vapours, enables the estimation by using oxygen sensor.
Abstract: Indirect on-line estimation of metal vapours of Hg and Zn using YSZ based electrochemical oxygen sensor is attempted. Change in oxygen partial pressure, in presence and absence of these metals vapours, enables the estimation by using oxygen sensor. Using this method, the Zn metal vapours has been detected down to 13.3 ± 0.7 vppm and for Hg vapour, the lowest detection limit is 68.1 ± 0.7 vppm. The measured vapour pressure is in agreement with the predicted values.
1 citations
1 citations
01 Jan 1996
TL;DR: In this article, a flash pyrolysis of biomass was used to produce high yields of pyrotelytic vapours; the vapours were then passed directly to a catalytic reactor where they were upgraded.
Abstract: The production of hydrocarbons from biomass could provide an alternative to conventional sources such as fossil fuels. The process developed at the University of Leeds was based on the flash pyrolysis of biomass to give high yields of pyrolytic vapours; the vapours were then passed directly to a catalytic reactor where they were upgraded. The major hydrocarbon species produced were the olefin gases, ethene and propene and aromatic liquid hydrocarbons which can be used in existing fossil fuel applications. The process typically gave yields of approximately 30% premium grade hydrocarbons.
1 citations