抄録
Catalytic decomposition of CCl2F2 was studied over a number of single and complex metal oxides using a fixed-bed reactor. The ZrO2-Cr2O3 catalyst exhibited the highest activity and CO2 and CClF3 were formed at 350 450°C. Selective decomposition of CCl2F2 into CO2 required the presence of both oxygen and water vapor over the catalyst. Catalytic activity gradually declined with time on stream because of the fluorination of ZrO2. Treatment of the catalyst with both oxygen and water vapor promoted the removal of fluoride ions in sub-surface layers of the catalyst, which is effective for the recovery of the activity. CCl2F2 was decomposed at 300-450°C over AlPO4. No fluorination of the AlPO4 catalyst took place after the reaction for 1000 h. CH2FCF3, an alternative CFC, was completely decomposed over the mixed catalyst of Ce promoted AlPO4 and Cr2O3 at 400-500°C. Catalytic decomposition is a rational method for destruction of used CFCs.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 165-173 |
| ページ数 | 9 |
| ジャーナル | Catalysis Surveys from Japan |
| 巻 | 2 |
| 発行部数 | 2 |
| DOI | |
| 出版物ステータス | 出版済み - 1 1 1998 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Physical and Theoretical Chemistry
これを引用
Catalytic decomposition of CFCs. / Takita, Yusaku; Ishihara, Tatsumi.
：: Catalysis Surveys from Japan, 巻 2, 番号 2, 01.01.1998, p. 165-173.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Catalytic decomposition of CFCs
AU - Takita, Yusaku
AU - Ishihara, Tatsumi
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Catalytic decomposition of CCl2F2 was studied over a number of single and complex metal oxides using a fixed-bed reactor. The ZrO2-Cr2O3 catalyst exhibited the highest activity and CO2 and CClF3 were formed at 350 450°C. Selective decomposition of CCl2F2 into CO2 required the presence of both oxygen and water vapor over the catalyst. Catalytic activity gradually declined with time on stream because of the fluorination of ZrO2. Treatment of the catalyst with both oxygen and water vapor promoted the removal of fluoride ions in sub-surface layers of the catalyst, which is effective for the recovery of the activity. CCl2F2 was decomposed at 300-450°C over AlPO4. No fluorination of the AlPO4 catalyst took place after the reaction for 1000 h. CH2FCF3, an alternative CFC, was completely decomposed over the mixed catalyst of Ce promoted AlPO4 and Cr2O3 at 400-500°C. Catalytic decomposition is a rational method for destruction of used CFCs.
AB - Catalytic decomposition of CCl2F2 was studied over a number of single and complex metal oxides using a fixed-bed reactor. The ZrO2-Cr2O3 catalyst exhibited the highest activity and CO2 and CClF3 were formed at 350 450°C. Selective decomposition of CCl2F2 into CO2 required the presence of both oxygen and water vapor over the catalyst. Catalytic activity gradually declined with time on stream because of the fluorination of ZrO2. Treatment of the catalyst with both oxygen and water vapor promoted the removal of fluoride ions in sub-surface layers of the catalyst, which is effective for the recovery of the activity. CCl2F2 was decomposed at 300-450°C over AlPO4. No fluorination of the AlPO4 catalyst took place after the reaction for 1000 h. CH2FCF3, an alternative CFC, was completely decomposed over the mixed catalyst of Ce promoted AlPO4 and Cr2O3 at 400-500°C. Catalytic decomposition is a rational method for destruction of used CFCs.
UR - http://www.scopus.com/inward/record.url?scp=0000779456&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000779456&partnerID=8YFLogxK
U2 - 10.1023/A:1019094828720
DO - 10.1023/A:1019094828720
M3 - Article
AN - SCOPUS:0000779456
VL - 2
SP - 165
EP - 173
JO - Catalysis Surveys from Asia
JF - Catalysis Surveys from Asia
SN - 1571-1013
IS - 2
ER -