Abstract
To elucidate the interaction mechanism of NOx (NO2 and NO) and H2O on the surface of H-type mordenite (HM), the dynamic adsorption properties of NO2 + H2O + O2 and NO + H2O + O2 mixtures were examined and the surface reaction of NOx and H2O was studied by an in-situ FT-IR spectroscopic method. It was found that NO2 can be dissociatively adsorbed on two kinds of adsorption sites on HM to form nitric acid like species by interacting with Brønsted acid sites, whereas NO + O2 + H2O adsorption is a competitive process of NO oxidation and H2O adsorption without leading to formation of nitric acid like species. The difference between NO2 adsorption sites and NO oxidation sites gives rise to the difference in their breakthrough properties. Adsorption/catalytic reaction models are proposed based on column adsorption and FT-IR results.
| Original language | English |
|---|---|
| Pages (from-to) | 1864-1871 |
| Number of pages | 8 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 40 |
| Issue number | 8 |
| Publication status | Published - 2001 Apr 18 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Polymers and Plastics
- Environmental Science(all)
- Chemical Engineering (miscellaneous)
Cite this
Cooperative and competitive adsorption mechanism of NO2, NO, and H2O on H-type mordenite. / Wang, Z. M.; Arai, Tsuyoshi; Kumagai, M.
In: Industrial and Engineering Chemistry Research, Vol. 40, No. 8, 18.04.2001, p. 1864-1871.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cooperative and competitive adsorption mechanism of NO2, NO, and H2O on H-type mordenite
AU - Wang, Z. M.
AU - Arai, Tsuyoshi
AU - Kumagai, M.
PY - 2001/4/18
Y1 - 2001/4/18
N2 - To elucidate the interaction mechanism of NOx (NO2 and NO) and H2O on the surface of H-type mordenite (HM), the dynamic adsorption properties of NO2 + H2O + O2 and NO + H2O + O2 mixtures were examined and the surface reaction of NOx and H2O was studied by an in-situ FT-IR spectroscopic method. It was found that NO2 can be dissociatively adsorbed on two kinds of adsorption sites on HM to form nitric acid like species by interacting with Brønsted acid sites, whereas NO + O2 + H2O adsorption is a competitive process of NO oxidation and H2O adsorption without leading to formation of nitric acid like species. The difference between NO2 adsorption sites and NO oxidation sites gives rise to the difference in their breakthrough properties. Adsorption/catalytic reaction models are proposed based on column adsorption and FT-IR results.
AB - To elucidate the interaction mechanism of NOx (NO2 and NO) and H2O on the surface of H-type mordenite (HM), the dynamic adsorption properties of NO2 + H2O + O2 and NO + H2O + O2 mixtures were examined and the surface reaction of NOx and H2O was studied by an in-situ FT-IR spectroscopic method. It was found that NO2 can be dissociatively adsorbed on two kinds of adsorption sites on HM to form nitric acid like species by interacting with Brønsted acid sites, whereas NO + O2 + H2O adsorption is a competitive process of NO oxidation and H2O adsorption without leading to formation of nitric acid like species. The difference between NO2 adsorption sites and NO oxidation sites gives rise to the difference in their breakthrough properties. Adsorption/catalytic reaction models are proposed based on column adsorption and FT-IR results.
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UR - http://www.scopus.com/inward/citedby.url?scp=0035906091&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0035906091
VL - 40
SP - 1864
EP - 1871
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 8
ER -