期刊
CATALYSIS COMMUNICATIONS
卷 108, 期 -, 页码 23-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2018.01.030
关键词
ZSM-5; SiC; Monolithic catalyst; NH3-SCR
资金
- INCOEmission project
- National Natural Science Foundation of China [51772041, 11474046, 61775024]
- Fundamental Research Funds for the Central Universities [DC201502080203, DC201502080409]
- Program for Liaoning Excellent Talents in University (LNET) [LR2015016]
- Science and Technique Foundation of Dalian [2015J12JH201]
Here, we developed a new kind of hetero-structural catalyst through the homogeneous growth of Cu-ZSM-5 zeolite onto silicon carbide (SiC) monolith by using a one-pot hydrothermal method combined with an ion-exchange process in a rotary oven. The new catalyst formulation was tested towards NH3-SCR, where the catalytic activity and stability of Cu-ZSM-5/SiC at T > 350 degrees C appear significantly higher than those obtained with Cu-ZSM-5 alone. In particular, the NO consumption rate of the former is 7.5 times larger on the average than that of the latter. This remarkable enhancement of catalytic activity is ascribed to the very good thermal conductivity of the SiC monolithic support. This research work could provide the means for the future design of more active and stable monolithic Cu-ZSM5-based catalytic systems with even lower Cu loading than the ones used in present de-NOx applications.
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