The invention relates to a 'catalyst used for ammonia selective catalytic reduction of nitrogen oxides to nitrogen gas and a preparation method thereof', and belongs to the catalyst technical filed. The catalyst consists of V2O5-WO3/TiO2/BaO/gamma-Al2O3. The catalyst takes gamma-Al2O3 as a...
It is crucial to make a distinction between catalysts that are used for fundamental research and those that are used on industrial scale. For basic research, it is imperative that the catalyst be of well-defined structure and of known composition; also, its surface must be clean or easily be...
16 TiO2/SO42− solid acida TiO2·nH2O was prepared from precipitation of TiCl4 using aqueous ammonia. Then immersed to sulphuric acid and finally calcined at 550 °C for 3 h to give TiO2–SO42−. 17 Al2O3/PO43− solid acida Aluminium nitrate hydrated with nine moles of water dis...
New life for old catalyst: technology developed in Europe is now being optimized to make an attractive catalyst rejuvenation option even better In addition, since regeneration obviates the need for disposal of used catalyst, it can significantly reduce the costs associated with that disposal process....
Electrochemically converting nitrate, a widespread water pollutant, back to valuable ammonia is a green and delocalized route for ammonia synthesis, and can be an appealing and supplementary alternative to the Haber-Bosch process. However, as there are other nitrate reduction pathways present, selectivel...
Studies by researchers at Tokyo Institute of Technology have developed a catalyst that is so effective at promoting dissociation of the nitrogen bond in ammonia production reactions that it is no longer the step limiting the rate of the reaction.
were blocked by the formed NO adducts on Fe–N–C catalysts and then five-electron electrochemical reductive stripping converted NO into ammonia (Fig.5c). By the accurate determination of the stripping charge (Qstrip, Fig.5d) by subtracting the poisoned and unpoisoned traces in the stripping ...
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The versatility of cyanide andbipyridylligands has been used to stabilize low oxidation states. By using potassium inliquid ammonia, K3TiIII(CN)6is reduced to K2TiII(CN)4and TiBr3+ KCN to K4Ti0(CN)4. With ZrBr3and MICN (MI= K, Rb) in liquid ammonia,ammonolysisoccurs and zerovalent ...
Therefore, the emergence of ammonia creation and conversion technology (ACCT) system shows excellent performance in reducing cold-start NOx emission [199]. Gao et al. [200] investigated the effect of aftertreatment system layout on exhaust gas emission reduction, as shown in Fig. 31. The results...