2024-03-28T13:33:24Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00008787
2022-12-13T02:22:20Z
1:87
(ケイ藻土材料へのアセトアルデヒド吸着挙動に対する湿度の影響)
Effect of Humidity on Adsorption Behavior of Acetaldehyde on a Diatomaceous Material
ケイ藻土材料へのアセトアルデヒド吸着挙動に対する湿度の影響
KANNO, Tohru
KAWAMURA, Keisuke
TADA, Kiyoshi
HORIUCHI, Jun-ichi
KOBAYASHI, Masayoshi
Diatomaceous material
Humidity
Adsorption of CH3CHO
Langmuir isotherm
Adsorption rate constant
The effect of humidity on the adsorption behavior of acetaldehyde was examined on a diatomaceous material (DM) both in a flow and a closed systems. All the adsorption isotherms of acetaldehyde with the flow system at 298, 313 and 323 K obeyed the Langmuir equation for 10% relative humidity (RH) in all the regions of partial pressure of acetaldehyde (PCH3CHO). In 60% RH, the adsorption isotherms obeyed the Langmuir equation up to 0.07 atm of PCH3CHO. Heat of adsorption in 60% RH in the range of PCH3CHO was larger than that in 10% RH, indicating strong interaction of adsorbed acetaldehyde and water. At PCH3CHO higher than 0.07 atm in 60% RH, the adsorption isotherms deviated from the Langmuir equation and the adsorbed amounts linearly increased with increasing PCH3CHO. The linearity suggested that acetaldehyde dissolved into multilayer of water on the surface of DM predominantly, in the range of PCH3CHO. Adsorption behavior obtained in a closed system suggested that both the initial adsorption rate and the adsorption rate constrant in 60% RH were twice those in 10% RH.
journal article
The Ceramic Society of Japan
2003-03
application/pdf
Journal of the Ceramic Society of Japan
1294
111
396
400
0914-5400
https://kitami-it.repo.nii.ac.jp/record/8787/files/J. of the Ceramic Soc. of Japan_111(1294) P396-400.pdf
eng
https://doi.org/10.2109/jcersj.111.396
open access