摘要
研究了ＦｅＣｏＭｎＫ／ＢｅＯ新型多组分催化剂上二氧化碳加氢的反应性能，考察了反应温度、空速及原料气组成对反应性能的影响． 结果表明，二氧化碳的转化率及烯烃／ 烷烃比值均高于氧化铝、硅胶或活性炭担载的催化剂．在６４７ Ｋ，３ ０００ ｈ－１ ，ＣＯ２／Ｈ２ 体积比为１／３ 的条件下，低碳烯烃的收率最高． 利用原位ＦＴＩＲ 技术研究了该催化剂上二氧化碳加氢反应的程序升温过程，提出了可能的反应机理．
A novel FeCoMnK/BeO catalyst was prepared by impregnation method and evaluated in the synthesis of light olefins from carbon dioxide hydrogenation. It is found that the yield of light olefins reaches the highest under the conditions of 647 K, 3?000 h -1 and CO 2/H 2 molar ratio 1/3. On BeO supported catalyst, the yield of light olefins is much higher than that on Al 2O 3, SiO 2 and active carbon supported catalysts. By the studies of in situ FT IR, a possible mechanism is proposed on the basis of surface intermediates.
出处
《催化学报》
CSCD
北大核心
2000年第1期71-74,共4页
关键词
负载型催化剂
二氧化碳
加氢
低碳烯烃
过渡金
FeCoMnK/BeO catalyst
beryllia
supported catalyst
carbon dioxide
hydrogenation
light olefins
in situ Fourier transform infrared spectroscopy
