Metal oxide catalysts for DME steam reforming: Ga2O3 and Ga2O3–Al2O3 catalysts with and without copper
Metal oxide catalysts for DME steam reforming: Ga2O3 and Ga2O3–Al2O3 catalysts with and without copper
复制标题
DOI：
10.1016/j.apcata.2005.02.030
复制
发表时间：
2005-05
影响因子：
5.5
通讯作者：
T. Mathew;Yusuke Yamada;A. Ueda;H. Shioyama;Tetsuhiko Kobayashi
中科院分区：
文献类型：
--
作者：
T. Mathew;Yusuke Yamada;A. Ueda;H. Shioyama;Tetsuhiko Kobayashi
在Cu/GaxAl10−xO15和GaxAl10−xO15催化剂上进行了二甲醚水蒸气重整反应。Al_2O_3中Ga_2O_3的存在显著影响了催化剂的二甲醚转化率和H_2产率。结果表明，GaxAl10−xO15的活性随Ga2O3浓度的增加而增加。在Cu/GaxAl10−xO15催化剂上，二甲醚水蒸气重整活性随催化剂中Ga2O3浓度的增加而提高。对Cu/GaxAl10−xO15催化剂的光电子能谱与二甲醚水蒸气重整活性的关联表明，表面的非均质性是获得高H_2产率的重要因素。Ga_2O_3与Cu之间的特殊相互作用对Cu的分布起着决定性的作用，使Cu/Ga_xAl_(10)−_xO_(15)对反应具有活性和稳定性。
The steam reforming of dimethyl ether (DME) was performed on Cu/GaxAl10−xO15and GaxAl10−xO15catalysts (where ‘x’ varies from 0 to 10). The presence of Ga2O3in Al2O3significantly affects the catalytic performance with respect to the DME conversion and the H2yield. It was found that the activity increases with the Ga2O3concentration for GaxAl10−xO15. The DME steam reforming activity on Cu/GaxAl10−xO15showed an improvement in the stability and H2yield as the Ga2O3concentration increased. A correlation between the XPS results and the DME steam reforming activity for Cu/GaxAl10−xO15reveals that the heterogeneity of the surface is important for achieving a high H2yield. The specific interaction between Ga2O3and Cu plays a decisive role in the distribution of Cu, which makes Cu/GaxAl10−xO15active and stable for the reaction.