Cr2O3 Catalysts for Fluorination of 2-Chloro-3,3,3-trifluoropropene to 2,3,3,3-Tetrafluoropropene
Cr2O3 Catalysts for Fluorination of 2-Chloro-3,3,3-trifluoropropene to 2,3,3,3-Tetrafluoropropene
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Cr2O3 催化剂用于 2-氯-3,3,3-三氟丙烯氟化成 2,3,3,3-四氟丙烯
DOI：
10.1021/ie303067d
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发表时间：
2013-02
期刊：
影响因子：
--
通讯作者：
Luo, Mengfei
中科院分区：
文献类型：
--
作者：
Jin, Lingyun;Hu, Gengshen;Lu, Jiqing;Luo, Mengfei
采用沉淀法制备Cr2O3催化剂，并进行HCFC-1233xf（2-氯-3,3,3-三氟丙烯）气相氟化制HFC-1234yf（2,3,3,3-四氟丙烯）实验，研究焙烧温度对其催化性能的影响。通过 XRD、Raman、NH3-TPD 和 BET 技术对催化剂进行了表征。结果表明，随着焙烧温度的升高，催化剂的晶粒尺寸增大，而表面酸性位点减少。结果发现，500 ℃煅烧的催化剂表现出最高的催化活性，在反应温度320 ℃时，HCFC-1233xf的转化率为63.3%，HFC-1234yf和HFC-245eb（1,1,1,2,3-五氟丙烷）的选择性分别为59%和38%。此外，还发现表面的积碳是反应过程中催化剂失活的原因。
Cr2O3 catalysts were prepared by a precipitation method and tested for vapor phase fluorination of HCFC-1233xf (2-chloro-3,3,3-trifluoropropene) to HFC-1234yf (2,3,3,3-tetrafluoropropene) to investigate the effect of calcination temperature on the catalytic performance. The catalysts were characterized by XRD, Raman, NH3-TPD, and BET techniques. The results show, with increasing calcination temperature, the crystallite size of the catalyst increased while the surface acid sites decreased. It was found that the catalyst calcined at 500 °C exhibited the highest catalytic activity, with a HCFC-1233xf conversion of 63.3% and selectivies to HFC-1234yf and HFC-245eb (1,1,1,2,3-pentafluoropropane) of 59 and 38%, respectively, at a reaction temperature of 320 °C. Moreover, it was found that the carbon deposit on the surface was responsible for the deactivation of the catalyst during the reaction.
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影响因子：
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作者：
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影响因子：
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