CO2 methanation on Co/TiO2 catalyst: Effects of Y on the support

CO2 methanation on Co/TiO2 catalyst: Effects of Y on the support
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Co/TiO2 催化剂上的 CO2 甲烷化:Y 对载体的影响

DOI:
10.1016/j.ces.2019.115245
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发表时间:
2019-09
影响因子:
4.7
通讯作者:
Ji Hongbing
Ji Hongbing
中科院分区:
工程技术2区
文献类型:
--
作者:
Qin Zuzeng;Wang Xiaodi;Dong Lihui;Su Tongming;Li Bin;Zhou Yuwen;Jiang Yuexiu;Luo Xuan;Ji Hongbing

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Y用于改善tio2支架的结构性能。结果表明,Y的掺入增加了BET的表面积,在tio2载体中产生了更多的氧空位,促进了CO2的活化。与Co/TiO2相比,Y掺杂的Co/TiO2样品中co3o4的还原温度降低,co3o4可以被还原成Co。此外,掺杂Y增强了催化剂的碱度,大大提高了对co2的吸附能力,有利于co2的活化和co2甲烷化反应。活性测试表明,20% Co/2% y - tio2催化剂的co2转化率和ch4选择性最高。20% Co/2% y - tio2催化剂在350 ℃时co2转化率最高,为85.9%,ch4选择性为99.5%,在40 h内保持稳定。
The Y was used for improving the structural performance of TiO2support. The results showed that the BET surface area was increased by doping Y, and more oxygen vacancies were generated in the TiO2support, which would promote the activation of CO2. The reduction temperature of the Co3O4was decreased and more Co3O4can be reduced into Co for the Y doped Co/TiO2samples compared to that of the Co/TiO2. Furthermore, the doped Y enhanced the basicity of the catalysts and the adsorption capacity of the CO2was greatly increased, which was beneficial to the activation of the CO2and the CO2methanation reaction. The activity test indicated that the CO2conversion and CH4selectivity was highest when using the 20% Co/2%Y-TiO2catalyst. The 20% Co/2%Y-TiO2catalyst exhibited the highest CO2conversion of 85.9%, and CH4selectivity of 99.5% at 350 °C, and kept stable in 40 h.
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