Influence of geometry-limited diffusion on the selective catalytic reduction of NO by hydrocarbons over Cu-exchanged zeolite

An FT-IR Study of NO2 Reduction in Nanocrystalline NaY Zeolite: Effect of Zeolite Crystal Size and Adsorbed Water

“…Furthermore, the small crystal size of nanocrystalline zeolites can dramatically alter the diffusional properties of these materials. The dependence of the SCR reaction rate, NO x conversion and catalyst durability on zeolite crystal size has been previously reported by others [17][18][19][20][21]. Ogura and co-workers reported the dependence of catalytic activity on H-ZSM-5 crystal size in deNO x reactions [17].…”

“…Higher conversion of NO x and propane in SCR reactions was obtained over zeolites with a smaller crystal size. Shichi and co-workers discovered that the reaction rate and conversion of NO x in SCR reaction over MFI-type zeolite were influenced by intracrystalline diffusion of hydrocarbons [18,19]. In addition, it has been reported that the durability of Co/ HZSM-5 increased with decreasing crystal size [21].…”

Effect of pretreatment on carbon oxidation activity over copper ion-exchanged zeolite catalysts

“…In fact, several researchers reported the formation of nitrate species on Cu-MFI catalyst in NO ? O 2 atmosphere [20][21][22]. As another possibility, if the oxidation of NO to NO 2 , with an accompanying exothermic effect (NO ?…”

Influence of Different Preparation Methods of Copper Loading on Na-Y Zeolite for Green Gas Emission

“…The sizes of intra-crystalline channel/pore and guest molecule are often one of the key parameters in zeolite diffusivity. Many researchers have reported that zeolite diffusivity can be correlated with the critical diameter of guest molecule [9].…”