Abstract
Selective reduction of NO with C3H6 under an oxidizing atmosphere was studied over various Cu ion-exchanged molecular sieves. All examined Cu ion-exchanged catalysts are active for NO reduction with C3H6 in a large excess of O2; however, the temperature at the maximum NO conversion depends on the kind of molecular sieves. In particular, it was found that Cu-SAPO-34 is sometimes more active than Cu-ZSM-5. Thermal stability of SAPO-34 was extremely high, and consequently, decrease in the activity to NO selective reduction on Cu-SAPO-34 was negligible over 60 h at 673 K in an atmosphere containing 15 vol % H2O. After thermal treatment at 1073 K in a humidified atmosphere, decrease in the activity to NO reduction was also small. Although the activity of Cu-SAPO-34 to NO reduction was decreased slightly with the coexistence of SO2, it is expected that the activity of Cu-SAPO-34 is sustained over a long period.
| Original language | English |
|---|---|
| Pages (from-to) | 17-22 |
| Number of pages | 6 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 36 |
| Issue number | 1 |
| Publication status | Published - Jan 1 1997 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
Thermostable Molecular Sieves, Silicoaluminophosphate (SAPO)-34, for the Removal of NOX with C3H6 in the Coexistence of O2, H2O, and SO2. / Ishihara, Tatsumi; Kagawa, Masaru; Hadama, Fumiaki; Nishiguchi, Hiroyasu; Ito, Masami; Takita, Yusaku.
In: Industrial and Engineering Chemistry Research, Vol. 36, No. 1, 01.01.1997, p. 17-22.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermostable Molecular Sieves, Silicoaluminophosphate (SAPO)-34, for the Removal of NOX with C3H6 in the Coexistence of O2, H2O, and SO2
AU - Ishihara, Tatsumi
AU - Kagawa, Masaru
AU - Hadama, Fumiaki
AU - Nishiguchi, Hiroyasu
AU - Ito, Masami
AU - Takita, Yusaku
PY - 1997/1/1
Y1 - 1997/1/1
N2 - Selective reduction of NO with C3H6 under an oxidizing atmosphere was studied over various Cu ion-exchanged molecular sieves. All examined Cu ion-exchanged catalysts are active for NO reduction with C3H6 in a large excess of O2; however, the temperature at the maximum NO conversion depends on the kind of molecular sieves. In particular, it was found that Cu-SAPO-34 is sometimes more active than Cu-ZSM-5. Thermal stability of SAPO-34 was extremely high, and consequently, decrease in the activity to NO selective reduction on Cu-SAPO-34 was negligible over 60 h at 673 K in an atmosphere containing 15 vol % H2O. After thermal treatment at 1073 K in a humidified atmosphere, decrease in the activity to NO reduction was also small. Although the activity of Cu-SAPO-34 to NO reduction was decreased slightly with the coexistence of SO2, it is expected that the activity of Cu-SAPO-34 is sustained over a long period.
AB - Selective reduction of NO with C3H6 under an oxidizing atmosphere was studied over various Cu ion-exchanged molecular sieves. All examined Cu ion-exchanged catalysts are active for NO reduction with C3H6 in a large excess of O2; however, the temperature at the maximum NO conversion depends on the kind of molecular sieves. In particular, it was found that Cu-SAPO-34 is sometimes more active than Cu-ZSM-5. Thermal stability of SAPO-34 was extremely high, and consequently, decrease in the activity to NO selective reduction on Cu-SAPO-34 was negligible over 60 h at 673 K in an atmosphere containing 15 vol % H2O. After thermal treatment at 1073 K in a humidified atmosphere, decrease in the activity to NO reduction was also small. Although the activity of Cu-SAPO-34 to NO reduction was decreased slightly with the coexistence of SO2, it is expected that the activity of Cu-SAPO-34 is sustained over a long period.
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M3 - Article
AN - SCOPUS:0030783955
VL - 36
SP - 17
EP - 22
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 1
ER -