Role of carbon dioxide in the dehydrogenation of ethane over gallium-loaded catalysts
Role of carbon dioxide in the dehydrogenation of ethane over gallium-loaded catalysts
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DOI：
10.1006/jcat.2001.3306
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发表时间：
2001-10
影响因子：
7.3
通讯作者：
K. Nakagawa;Chiaki Kajita;K. Okumura;N. Ikenaga;M. Nishitani-Gamo;T. Ando;Tetsuhiko Kobayashi;
中科院分区：
文献类型：
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作者：
K. Nakagawa;Chiaki Kajita;K. Okumura;N. Ikenaga;M. Nishitani-Gamo;T. Ando;Tetsuhiko Kobayashi;
研究了 CO2 在 Ga2O3 负载催化剂上乙烷脱氢中的作用。研究发现，在 923 K 的 CO2 存在下，Ga2O3/TiO2 催化剂对于乙烷脱氢生成乙烯最为有效。在 CO2 存在下，Ga2O3/TiO2 催化剂的活性随着 CO2 分压的增加而增加。为了保持高催化活性，对于 Ga2O3/TiO2 催化剂，CO2 和蒸汽的共进料是有效的。在Ga2O3/TiO2催化剂上，与不存在CO2相比，CO2的存在显着促进了乙烷脱氢。使用脉冲反应技术，发现在乙烷脱氢中使用二氧化碳可以减少催化剂上的碳沉积，并有助于产物（乙烯）从催化剂表面快速解吸。
The role of CO2 in the dehydrogenation of ethane over Ga2O3-loaded catalysts was examined. Ga2O3/TiO2 catalyst was found to be the most effective for the dehydrogenation of ethane to ethene in the presence of CO2 at 923 K. The activity of the Ga2O3/TiO2 catalyst in the presence of CO2 increased with increases in the partial pressure of CO2. To maintain high catalytic activity, cofeeding of CO2 and steam was effective in the case of the Ga2O3/TiO2 catalyst. Over the Ga2O3/TiO2 catalyst, the presence of CO2 markedly promoted the dehydrogenation of ethane as compared with the absence of CO2. Using a pulsed reaction technique, the use of CO2 in the dehydrogenation of ethane was found to reduce carbon deposition over the catalyst and to assist in the rapid desorption of the product (ethene) from the catalyst's surface.