期刊
TOPICS IN CATALYSIS
卷 62, 期 1-4, 页码 79-85出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-018-1104-1
关键词
SCR; DeNO(x); Ag; Al2O3; Ethanol; NH3
资金
- Region Nouvelle Aquitaine
- FEDER
In a previous study, a drastic enhancement of the NOx conversion in EtOH-SCR process was achieved by means of ammonia and ethanol co-feeding over Ag/Al2O3 catalyst to avoid the NO2/NOx ratio dependency of conventional implemented urea-SCR technology. The ammonia activation was mainly attributed to the availability of hydrogen H* species resulting from EtOH dehydrogenation, which promoted the H-2 assisted NH3-SCR over Ag/Al2O3. Additional conversion gain was reached with a dual-bed configuration in which a NH3-SCR catalyst (WO3/CexZr1-xO2) was added downstream to the silver-based sample (Ag/Al2O3+NH3-SCR catalyst). This study deals with the influence of the SCR catalyst formulation on the catalytic performances of the dual-bed system. Oxide-based sample (WO3/CexZr1-xO2) and exchanged copper zeolite (Cu-2.5-FER) were selected as model NH3-SCR catalysts. Results shows that WO3/CexZr1-xO2 in more appropriate in dual-bed configuration for (EtOH+NH3)-SCR process because ammonia and ethanol (or its by-products) strongly interacted together on Cu-2.5-FER.
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