2018
DOI: 10.1016/j.apcatb.2017.10.026
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Transient operando study on the NH3/NH4+ interplay in V-SCR monolithic catalysts

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Cited by 49 publications
(54 citation statements)
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“…More recent operando TIR configurations are capable of characterizing shaped industrial catalyst conformed monolithic catalysts. The instrument measures chemisorption profiles along the length of the of the bed, which is a powerful advance to understand reaction mechanisms of commerical catalytic materials …”
Section: Uncertaintymentioning
confidence: 99%
“…More recent operando TIR configurations are capable of characterizing shaped industrial catalyst conformed monolithic catalysts. The instrument measures chemisorption profiles along the length of the of the bed, which is a powerful advance to understand reaction mechanisms of commerical catalytic materials …”
Section: Uncertaintymentioning
confidence: 99%
“…With coverage of more than 50%, the stability of the catalyst and the conversion of NO x at high temperatures cannot be guaranteed [7,14]. The vanadium coverage of conventional catalysts is below the dispersion limit that monolayer 6–7 atom /nm 2 to avoid the crystalline V 2 O 5 [15]. It is generally believed that in the dry anatase surface at low loading V 2 O 5 , the dehydrated surface vanadium generally tend to possess isolated four-fold coordination.…”
Section: Composition Of Vanadium Based Catalystmentioning
confidence: 99%
“…In practical application, the vanadium species mainly exists in the form of polyvanadate, as shown in Figure 1b. This species has higher SCR reactivity than the monomer (Ti-O) 3 V=O [3,15,16]. At high loading V 2 O 5 , crystalline vanadia is generated on sulfated TiO 2 (Figure 1c).…”
Section: Composition Of Vanadium Based Catalystmentioning
confidence: 99%
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“…In this sense, the comparison of SCR performance in dry and wet conditions could lead to strong deviations on the Lewis‐to‐Brønsted acid V−O sites ratio which could make difficult any relevant relationships with catalytic properties. As a matter of fact, Rasmussen recently found that NH 3 or NH 4 + intermediates can interplay . By using integral catalytic reactor suited for operando spectroscopic measurements on a monolith, these authors revisited the reaction mechanism of the NH 3 −SCR on a vanadia‐based catalyst facing important technical problems for extracting relevant spectroscopic information in real exhaust conditions especially to distinguish adsorbed ammonia and water.…”
Section: The Surface Chemistry Of Benchmark V2o5 Scr‐catalysts: What mentioning
confidence: 99%