Abstract
This work mainly involves the study of effect of relative humidity on adsorption of formaldehyde on the activated carbons modified with organosilane solution. Modification of activated carbons was carried out by impregnating activated carbon with organosilane/methanol-containing solutions. The breakthrough curves of formaldehyde in the packed beds of original and modified activated carbons were measured, respectively, at relative humidity of 30%, 60%, and 80%. Temperature-programmed desorption (TPD) experiments were used to estimate the activation energy for desorption of formaldehyde from the activated carbon. Results showed that the relative humidity had strongly influence on breakthrough curves of formaldehyde in the packed beds. The higher the relative humidity of gas mixtures through the packed beds was, the smaller the breakthrough time of formaldehyde became. The use of organosilane compounds to modify surfaces of the activated carbon can enhance the interaction between formaldehyde and the surfaces, and as a result, the breakthrough times of formaldehyde in the packed beds of the modified activated carbon were longer than that in the packed bed of the unmodified activated carbon.
| Original language | English |
|---|---|
| Pages (from-to) | 871-875 |
| Number of pages | 5 |
| Journal | Chinese Journal of Chemical Engineering |
| Volume | 16 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Dec 2008 |
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Keywords
- activated carbon
- breakthrough curve
- desorption activation energy
- formaldehyde
ASJC Scopus subject areas
- Chemical Engineering(all)
- Biochemistry
- Environmental Engineering
- Chemistry(all)
Cite this
Effect of Relative Humidity on Adsorption of Formaldehyde on Modified Activated Carbons. / Li, Jing; LI, Zhong; LIU, Bing; XIA, Qibin; XI, Hongxia.
In: Chinese Journal of Chemical Engineering, Vol. 16, No. 6, 12.2008, p. 871-875.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Relative Humidity on Adsorption of Formaldehyde on Modified Activated Carbons
AU - Li, Jing
AU - LI, Zhong
AU - LIU, Bing
AU - XIA, Qibin
AU - XI, Hongxia
PY - 2008/12
Y1 - 2008/12
N2 - This work mainly involves the study of effect of relative humidity on adsorption of formaldehyde on the activated carbons modified with organosilane solution. Modification of activated carbons was carried out by impregnating activated carbon with organosilane/methanol-containing solutions. The breakthrough curves of formaldehyde in the packed beds of original and modified activated carbons were measured, respectively, at relative humidity of 30%, 60%, and 80%. Temperature-programmed desorption (TPD) experiments were used to estimate the activation energy for desorption of formaldehyde from the activated carbon. Results showed that the relative humidity had strongly influence on breakthrough curves of formaldehyde in the packed beds. The higher the relative humidity of gas mixtures through the packed beds was, the smaller the breakthrough time of formaldehyde became. The use of organosilane compounds to modify surfaces of the activated carbon can enhance the interaction between formaldehyde and the surfaces, and as a result, the breakthrough times of formaldehyde in the packed beds of the modified activated carbon were longer than that in the packed bed of the unmodified activated carbon.
AB - This work mainly involves the study of effect of relative humidity on adsorption of formaldehyde on the activated carbons modified with organosilane solution. Modification of activated carbons was carried out by impregnating activated carbon with organosilane/methanol-containing solutions. The breakthrough curves of formaldehyde in the packed beds of original and modified activated carbons were measured, respectively, at relative humidity of 30%, 60%, and 80%. Temperature-programmed desorption (TPD) experiments were used to estimate the activation energy for desorption of formaldehyde from the activated carbon. Results showed that the relative humidity had strongly influence on breakthrough curves of formaldehyde in the packed beds. The higher the relative humidity of gas mixtures through the packed beds was, the smaller the breakthrough time of formaldehyde became. The use of organosilane compounds to modify surfaces of the activated carbon can enhance the interaction between formaldehyde and the surfaces, and as a result, the breakthrough times of formaldehyde in the packed beds of the modified activated carbon were longer than that in the packed bed of the unmodified activated carbon.
KW - activated carbon
KW - breakthrough curve
KW - desorption activation energy
KW - formaldehyde
UR - http://www.scopus.com/inward/record.url?scp=58149123485&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58149123485&partnerID=8YFLogxK
U2 - 10.1016/S1004-9541(09)60008-2
DO - 10.1016/S1004-9541(09)60008-2
M3 - Article
VL - 16
SP - 871
EP - 875
JO - Chinese Journal of Chemical Engineering
JF - Chinese Journal of Chemical Engineering
SN - 1004-9541
IS - 6
ER -