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Local Environment and Nature of Cu Active Sites in Zeolite-Based Catalysts for the Selective Catalytic Reduction of NOx
Cu-exchanged zeolites have demonstrated widespread use as catalyst materials in the abatement of NOx, especially from mobile sources. Recent studies focusing on Cu-exchanged zeolites with the CHAExpand
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Confirmation of Isolated Cu2+ Ions in SSZ-13 Zeolite as Active Sites in NH3-Selective Catalytic Reduction
NH3-Selective Catalytic Reduction (NH3-SCR) is a widely used technology for NOx reduction in the emission control systems of heavy duty diesel vehicles. Copper-based ion exchanged zeolites and inExpand
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Determining the storage, availability and reactivity of NH3 within Cu-Chabazite-based Ammonia Selective Catalytic Reduction systems.
Three different types of NH3 species can be simultaneously present on Cu(2+)-exchanged CHA-type zeolites, commonly used in Ammonia Selective Catalytic Reduction (NH3-SCR) systems. These includeExpand
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Changing active sites in Cu–CHA catalysts: deNOx selectivity as a function of the preparation method
The selective catalytic reduction of NOx with ammonia (NH3–SCR) has been studied over Cu–CHA catalysts in which the loading of copper species was achieved using three different synthetic routes: twoExpand
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Ruthenium-catalyzed hydrogenation of levulinic acid: Influence of the support and solvent on catalyst selectivity and stability
Abstract The catalytic performance of 1 wt% Ru-based catalysts in the hydrogenation of levulinic acid (LA) has been studied at 40 bar H 2 and 473 K. This was done by assessing the influence of theExpand
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Selective Catalytic Reduction of NOx over Copper-based Microporous Catalysts
Increasing concerns in our society regarding the release of harmful gasses into the atmosphere have led to the development and implementation of various technologies that curb the amount ofExpand
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Correlating Metal Poisoning with Zeolite Deactivation in an Individual Catalyst Particle by Chemical and Phase-Sensitive X-ray Microscopy**
Fluid catalytic cracking (FCC) is the main conversion process used in oil refineries. An X-ray microscopy method is used to show that metal poisoning and related structural changes in the zeoliteExpand
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Intergrowth structure and aluminium zoning of a zeolite ZSM-5 crystal as resolved by synchrotron-based micro X-ray diffraction imaging.
Zeolites represent an important group of heterogeneous catalysts and are heavily used in the petrochemical and refining industries.[1] Since their discovery, zeolites with MFI topology, namely ZSM-5,Expand
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Chemical deactivation of Cu-SSZ-13 ammonia selective catalytic reduction (NH3-SCR) systems
The chemical deactivation of Cu-SSZ-13 Ammonia Selective Catalytic Reduction (NH3-SCR) catalysts by Pt, Zn, Ca and P has been systematically investigated using a range of analytical techniques inExpand
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Effect of high energy electron beam irradiation on the structural properties, electrical resistivity and thermopower of La0.5Sr0.5MnO3 manganites
Abstract Bulk samples of La0.5Sr0.5MnO3 manganite have been subjected to electron beam irradiation of different dosages. As a consequence, the structural and electronic transport properties vizExpand