High sustainability of Cu–Al–Ox catalysts against daily start-up and shut-down (DSS)-like operation in the water–gas shift reaction
High sustainability of Cu–Al–Ox catalysts against daily start-up and shut-down (DSS)-like operation in the water–gas shift reaction
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DOI：
10.1016/j.catcom.2008.12.061
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发表时间：
2009-03
影响因子：
3.7
通讯作者：
T. Shishido;S. Nishimura;Y. Yoshinaga;K. Ebitani;K. Teramura;Tsunehiro Tanaka
中科院分区：
文献类型：
--
作者：
T. Shishido;S. Nishimura;Y. Yoshinaga;K. Ebitani;K. Teramura;Tsunehiro Tanaka
在水煤气变换反应中，经823K焙烧的共沉淀型CuAlOx催化剂(CP-823)即使在每日启停(DSS)式操作50次后，仍表现出比工业用的Cu2O3型催化剂更高的活性和稳定性。CP-823的高稳定活性是由于形成了高度分散和稳定的铜金属。DSS过程中原位生成的薄水铝石相对抑制金属铜颗粒的团聚起着重要作用。
Coprecipitated-Cu–Al–Ox catalyst calcined at 823K (CP-823) showed higher activity and sustainability than a commercial Cu/ZnO/Al2O3catalyst even after 50 cycles of the daily start-up and shut-down (DSS)-like operation in the water–gas shift reaction. The high, stable activity of CP-823 is caused by the formation of highly dispersed and stable Cu metal. A boehmite phase formed “in situ” during the DSS operation has an important role in inhibition of aggregation of Cu metal particles.