“BET isotherm”的概念、定义、翻译、参考文献-科学参考

BET isotherm

Physics

An isotherm that takes account of the possibility that the monolayer in the Langmuir adsorption isotherm can act as a substrate for further adsorption. The BET isotherm (named after S. Brunauer, P. Emmett, and E. Teller) has the form:

$V / V_{mon} = c z / {(1 - z) [1 - (1 - c) z]},$

where z=p/p* (p* is the vapour pressure above a macroscopically thick layer of liquid on the surface), V_mon is the volume that corresponds to the surface being covered by a monolayer, V and p are the volume and pressure of the gas respectively, and c is a constant. In the BET isotherm, the isotherm rises indefinitely at high pressures (in contrast to the Langmuir isotherm). It provides a useful approximation over some ranges of pressure but underestimates adsorption for low pressures and overestimates adsorption for high pressures.

Chemistry

An isotherm that takes account of the possibility that the monolayer in the Langmuir adsorption isotherm can act as a substrate for further adsorption. The BET isotherm (named after Stephen Brunauer, Hugh Emmett, and Edward Teller who derived it in 1938) has the form:
$V / V_{mon} = c z / {(1 - z) [1 - (1 - c) z]},$
where z = p/p* (p* is the vapour pressure above a macroscopically thick layer of liquid on the surface), V_mon is the volume that corresponds to the surface being covered by a monolayer, V and p are the volume and pressure of the gas respectively, and c is a constant. In the BET isotherm, the isotherm rises indefinitely at high pressures (in contrast to the Langmuir isotherm). It provides a useful approximation over some ranges of pressure but underestimates adsorption for low pressures and overestimates adsorption for high pressures.

单词	BET isotherm
释义	BET isotherm Physics An isotherm that takes account of the possibility that the monolayer in the Langmuir adsorption isotherm can act as a substrate for further adsorption. The BET isotherm (named after S. Brunauer, P. Emmett, and E. Teller) has the form: $V / V_{mon} = c z / {(1 - z) [1 - (1 - c) z]},$ where z=p/p* (p* is the vapour pressure above a macroscopically thick layer of liquid on the surface), V_mon is the volume that corresponds to the surface being covered by a monolayer, V and p are the volume and pressure of the gas respectively, and c is a constant. In the BET isotherm, the isotherm rises indefinitely at high pressures (in contrast to the Langmuir isotherm). It provides a useful approximation over some ranges of pressure but underestimates adsorption for low pressures and overestimates adsorption for high pressures. Chemistry An isotherm that takes account of the possibility that the monolayer in the Langmuir adsorption isotherm can act as a substrate for further adsorption. The BET isotherm (named after Stephen Brunauer, Hugh Emmett, and Edward Teller who derived it in 1938) has the form: $V / V_{mon} = c z / {(1 - z) [1 - (1 - c) z]},$ where z = p/p* (p* is the vapour pressure above a macroscopically thick layer of liquid on the surface), V_mon is the volume that corresponds to the surface being covered by a monolayer, V and p are the volume and pressure of the gas respectively, and c is a constant. In the BET isotherm, the isotherm rises indefinitely at high pressures (in contrast to the Langmuir isotherm). It provides a useful approximation over some ranges of pressure but underestimates adsorption for low pressures and overestimates adsorption for high pressures.
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