Abstract
KOH-impregnated activated carbon (K-IAC) was studied as a NOx adsorbent. When adsorbing NO2/air to K-IAC, as the concentration increases, the removal efficiency relatively decreases because the function of the selective adsorption site for NOx is lost faster. By using AES/SAM and ToF-SIMS, we examined the chemical characteristics created on K-IAC through adsorption of NOx. Oxide crystals formed on the surface of K-IAC after adsorption of NOx was a result of the chemical bond among K, N, and O. KNO3 was predominantly distributed on the external surface, and the pore of K-IAC showed blocking from the crystal growth of KNO3. The results showed that surface basic OH-, well developed on the surface because of KOH impregnation, acts as a selective adsorption site. This study pointedly illustrates selective adsorption behavior from strong chemical interaction between NOx and K-IAC.
| Original language | English |
|---|---|
| Pages (from-to) | 3337-3345 |
| Number of pages | 9 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 40 |
| Issue number | 15 |
| Publication status | Published - 2001 Jul 15 |
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All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Environmental Science(all)
- Chemical Engineering (miscellaneous)
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Surface chemical characterization using AES/SAM and ToF-SIMS on KOH-impregnated activated carbon by selective adsorption of NOx . / Lee, Y. W.; Choi, D. K.; Park, J. W.
In: Industrial and Engineering Chemistry Research, Vol. 40, No. 15, 15.07.2001, p. 3337-3345.Research output: Contribution to journal › Article
TY - JOUR
T1 - Surface chemical characterization using AES/SAM and ToF-SIMS on KOH-impregnated activated carbon by selective adsorption of NOx
AU - Lee, Y. W.
AU - Choi, D. K.
AU - Park, J. W.
PY - 2001/7/15
Y1 - 2001/7/15
N2 - KOH-impregnated activated carbon (K-IAC) was studied as a NOx adsorbent. When adsorbing NO2/air to K-IAC, as the concentration increases, the removal efficiency relatively decreases because the function of the selective adsorption site for NOx is lost faster. By using AES/SAM and ToF-SIMS, we examined the chemical characteristics created on K-IAC through adsorption of NOx. Oxide crystals formed on the surface of K-IAC after adsorption of NOx was a result of the chemical bond among K, N, and O. KNO3 was predominantly distributed on the external surface, and the pore of K-IAC showed blocking from the crystal growth of KNO3. The results showed that surface basic OH-, well developed on the surface because of KOH impregnation, acts as a selective adsorption site. This study pointedly illustrates selective adsorption behavior from strong chemical interaction between NOx and K-IAC.
AB - KOH-impregnated activated carbon (K-IAC) was studied as a NOx adsorbent. When adsorbing NO2/air to K-IAC, as the concentration increases, the removal efficiency relatively decreases because the function of the selective adsorption site for NOx is lost faster. By using AES/SAM and ToF-SIMS, we examined the chemical characteristics created on K-IAC through adsorption of NOx. Oxide crystals formed on the surface of K-IAC after adsorption of NOx was a result of the chemical bond among K, N, and O. KNO3 was predominantly distributed on the external surface, and the pore of K-IAC showed blocking from the crystal growth of KNO3. The results showed that surface basic OH-, well developed on the surface because of KOH impregnation, acts as a selective adsorption site. This study pointedly illustrates selective adsorption behavior from strong chemical interaction between NOx and K-IAC.
UR - http://www.scopus.com/inward/record.url?scp=0035878058&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035878058&partnerID=8YFLogxK
M3 - Article
VL - 40
SP - 3337
EP - 3345
JO - Industrial & Engineering Chemistry Product Research and Development
JF - Industrial & Engineering Chemistry Product Research and Development
SN - 0888-5885
IS - 15
ER -