NO reduction under the excess O2 condition by porous VYCOR catalyst

M. Yamamoto, S. Ona, Suguru Noda, M. Sadakata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Exhaust gas from a diesel engine is one of the main causes of air pollution. It is difficult to reduce NO under the excess O2 concentration so that effective method of NO reduction has not been developed. In this study, nickel on the porous glass (VYCOR glass) was examined as a catalyst for NO reduction. This catalyst was effective for NO reduction where 35% of NO was converted to N2 under excess O2 concentration (3 %) in the tubular fixed-bed reactor. Adsorption rates of NO and O2 gases were measured in order to examine the mechanism of selective reduction of NO by porous VYCOR catalyst. It was proved that NO adsorption rate was much higher than O2 adsorption rate, so that difference of adsorption rate was one of the main causes of NO reduction. As a short lifetime of the catalyst was the serious disadvantage of the tubular fixed-bed reactor, another type of catalytic reactor was proposed and tested. It is a membrane reactor consisting of a porous VYCOR catalyst tube and a quartz tube. NO reduction under excess O2 concentration was also achieved in the membrane reactor. Maximum conversion from NO to N2 was 45 %. The possibility of longer lifetime catalyst could be found.

Original languageEnglish
Pages (from-to)834-839
Number of pages6
JournalJournal of Chemical Engineering of Japan
Volume34
Issue number6
DOIs
Publication statusPublished - 2001 Jun
Externally publishedYes

Fingerprint

Catalysts
Adsorption
Membranes
Glass
Quartz
Exhaust gases
Nickel
Air pollution
Diesel engines
Gases

Keywords

  • Catalyst
  • Diesel
  • NO
  • Porous
  • Reduction

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

NO reduction under the excess O2 condition by porous VYCOR catalyst. / Yamamoto, M.; Ona, S.; Noda, Suguru; Sadakata, M.

In: Journal of Chemical Engineering of Japan, Vol. 34, No. 6, 06.2001, p. 834-839.

Research output: Contribution to journalArticle

Yamamoto, M. ; Ona, S. ; Noda, Suguru ; Sadakata, M. / NO reduction under the excess O2 condition by porous VYCOR catalyst. In: Journal of Chemical Engineering of Japan. 2001 ; Vol. 34, No. 6. pp. 834-839.
@article{1166d97f6e984cf88e7df77d5a0d2f99,
title = "NO reduction under the excess O2 condition by porous VYCOR catalyst",
abstract = "Exhaust gas from a diesel engine is one of the main causes of air pollution. It is difficult to reduce NO under the excess O2 concentration so that effective method of NO reduction has not been developed. In this study, nickel on the porous glass (VYCOR glass) was examined as a catalyst for NO reduction. This catalyst was effective for NO reduction where 35{\%} of NO was converted to N2 under excess O2 concentration (3 {\%}) in the tubular fixed-bed reactor. Adsorption rates of NO and O2 gases were measured in order to examine the mechanism of selective reduction of NO by porous VYCOR catalyst. It was proved that NO adsorption rate was much higher than O2 adsorption rate, so that difference of adsorption rate was one of the main causes of NO reduction. As a short lifetime of the catalyst was the serious disadvantage of the tubular fixed-bed reactor, another type of catalytic reactor was proposed and tested. It is a membrane reactor consisting of a porous VYCOR catalyst tube and a quartz tube. NO reduction under excess O2 concentration was also achieved in the membrane reactor. Maximum conversion from NO to N2 was 45 {\%}. The possibility of longer lifetime catalyst could be found.",
keywords = "Catalyst, Diesel, NO, Porous, Reduction",
author = "M. Yamamoto and S. Ona and Suguru Noda and M. Sadakata",
year = "2001",
month = "6",
doi = "10.1252/jcej.34.834",
language = "English",
volume = "34",
pages = "834--839",
journal = "Journal of Chemical Engineering of Japan",
issn = "0021-9592",
publisher = "Society of Chemical Engineers, Japan",
number = "6",

}

TY - JOUR

T1 - NO reduction under the excess O2 condition by porous VYCOR catalyst

AU - Yamamoto, M.

AU - Ona, S.

AU - Noda, Suguru

AU - Sadakata, M.

PY - 2001/6

Y1 - 2001/6

N2 - Exhaust gas from a diesel engine is one of the main causes of air pollution. It is difficult to reduce NO under the excess O2 concentration so that effective method of NO reduction has not been developed. In this study, nickel on the porous glass (VYCOR glass) was examined as a catalyst for NO reduction. This catalyst was effective for NO reduction where 35% of NO was converted to N2 under excess O2 concentration (3 %) in the tubular fixed-bed reactor. Adsorption rates of NO and O2 gases were measured in order to examine the mechanism of selective reduction of NO by porous VYCOR catalyst. It was proved that NO adsorption rate was much higher than O2 adsorption rate, so that difference of adsorption rate was one of the main causes of NO reduction. As a short lifetime of the catalyst was the serious disadvantage of the tubular fixed-bed reactor, another type of catalytic reactor was proposed and tested. It is a membrane reactor consisting of a porous VYCOR catalyst tube and a quartz tube. NO reduction under excess O2 concentration was also achieved in the membrane reactor. Maximum conversion from NO to N2 was 45 %. The possibility of longer lifetime catalyst could be found.

AB - Exhaust gas from a diesel engine is one of the main causes of air pollution. It is difficult to reduce NO under the excess O2 concentration so that effective method of NO reduction has not been developed. In this study, nickel on the porous glass (VYCOR glass) was examined as a catalyst for NO reduction. This catalyst was effective for NO reduction where 35% of NO was converted to N2 under excess O2 concentration (3 %) in the tubular fixed-bed reactor. Adsorption rates of NO and O2 gases were measured in order to examine the mechanism of selective reduction of NO by porous VYCOR catalyst. It was proved that NO adsorption rate was much higher than O2 adsorption rate, so that difference of adsorption rate was one of the main causes of NO reduction. As a short lifetime of the catalyst was the serious disadvantage of the tubular fixed-bed reactor, another type of catalytic reactor was proposed and tested. It is a membrane reactor consisting of a porous VYCOR catalyst tube and a quartz tube. NO reduction under excess O2 concentration was also achieved in the membrane reactor. Maximum conversion from NO to N2 was 45 %. The possibility of longer lifetime catalyst could be found.

KW - Catalyst

KW - Diesel

KW - NO

KW - Porous

KW - Reduction

UR - http://www.scopus.com/inward/record.url?scp=0035354148&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035354148&partnerID=8YFLogxK

U2 - 10.1252/jcej.34.834

DO - 10.1252/jcej.34.834

M3 - Article

VL - 34

SP - 834

EP - 839

JO - Journal of Chemical Engineering of Japan

JF - Journal of Chemical Engineering of Japan

SN - 0021-9592

IS - 6

ER -