Vapor phase fluorination of 1,1,1-trifluoro-2-chloroethane over CrO<sub>x</sub>-Y<sub>2</sub>O<sub>3</sub> catalysts: Effects of calcination atmosphere and chromium content
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Creator |
Pu, Zhi-Ying
Yu, Hong-Bo Jia, Wen-Zhi Zhou, Huan Wang, Yue-Juan Luo, Meng-Fei |
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| Date |
2011-11-30T10:23:02Z
2011-11-30T10:23:02Z 2011-12 |
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| Identifier |
0975-0975(Online); 0376-4710(Print)
http://hdl.handle.net/123456789/13107 |
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| Description |
1719-1724
CrO<sub>x</sub>-Y<sub>2</sub>O<sub>3</sub> catalysts (CrYO) prepared by a coprecipitation method transformed to Cr<sub>2</sub>O<sub>3</sub>-YF<sub>3 </sub>(CrYF) catalysts after being fluorinated with HF. The effects of calcination atmosphere and chromium content on its catalytic activity for the vapor phase fluorination of 1,1,1-trifluoro-2-chloroethane have been investigated. The CrYF catalysts calcined in nitrogen atmosphere show higher catalytic activity than those calcined in air. In addition, the CrYF-20 and CrF catalysts (calcined in nitrogen or air) show higher catalytic activity than CrYF-50 and CrYF-80 catalysts. Characterization results indicate that the CrYO and CrYF catalysts calcined in nitrogen atmosphere are amorphous and much easier to fluorinate with HF than those calcined in air, while CrO-N and CrF-N exist mainly as crystalline phase and difficult to be fluorinated. It is also observed that the surface acidity plays an important role in the catalyst activity for the vapor phase fluorination of HCFC-133a. |
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| Language |
en_US
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| Publisher |
NISCAIR-CSIR, India
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Source |
IJC-A Vol.50A(12) [December 2011]
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| Subject |
Catalysts
Oxides Chromium oxide Yttrium oxide Fluorination Vapor phase fluorination |
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| Title |
Vapor phase fluorination of 1,1,1-trifluoro-2-chloroethane over CrO<sub>x</sub>-Y<sub>2</sub>O<sub>3</sub> catalysts: Effects of calcination atmosphere and chromium content
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| Type |
Article
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