Impregnation metal

T. L. Rutt andJ. A. Syne, "Fabrication of Multilayer Ceramic Capacitor by Metal Impregnation," IEEE Trans. Parts Hybrids Packag., PHP-9, 144-147 (1973). 

Dry metal-impregnated charcoal catalyst was being added from a polythene bag to an aqueous solution under nitrogen. Static so generated ignited the charcoal dust and caused a flash fire. The risk was eliminated by adding a slurry of catalyst in water from a metal container. 

Murakami T. A metal impregnation method of biological specimens for scanning electron microscopy. Arch Histol Jpn 1973 35 323-326. 

Considering all we know up to now, the specific properties of zeolites can be summarized as follows. Zeolites are aluminosilicates with defined microporous channels or cages. They have excellent ion-exchange properties and can thus be used as water softeners and to remove heavy metal cations from solutions. Furthermore, zeolites have molecular sieve properties, making them very useful for gas separation and adsorption processes, e.g., they can be used as desiccants or for separation of product gas streams in chemical processes. Protonated zeolites are efficient solid-state acids, which are used in catalysis and metal-impregnated zeolites are useful catalysts as well. 

Glycerol hydrogenolysis has also been illustrated over transition metals impregnated on silica. Some metals, such as Co and Pt, appear inactive for glycerol conversion, while others, such as Rh, Pd, Ir and, especially, Ru are active but lack the... 

We have found that Additive R has very good metals tolerance. Laboratory metals-impregnation studies show that 5,000 ppm Ni + V (33% Ni, 67% V) has no effect on the SOx reduction capability of Additive R. At a higher metals level of 10,000 ppm Ni + V (33% Ni, 67% V), Additive R loses only 9% of its SOx reduction capability. This is seen in Figure 5 for DA-250 + 10% Additive R + 0.37% CP-3. In this study, the DA-250 and Additive R were impregnated with metals then CP-3 was added and the 3-component blend steam deactivated at 1350 F, 100% steam, 15 psig, 8 hours. 

Figure 7-16 A highly simplified sketch of an automohile engine and catalytic converter with typical gas compositions indicated before and after the automotive catalytic converter. The catalytic converter is a tube wall reactor in which a noble-metal-impregnated wash coat on an extruded ceramic monolith creates surface on which reactions occur.

Finally, the effect of various steps of the deactivation procedures prior to the ReDox cycles on the acidity of the samples was investigated. Catalytic samples were collected after the first calcination step and after the metal impregnation step just... 

Ammonia is adsorbed on the surface of an SCR catalyst in a diffusion limited laminar flow regime. The ammonia combines with vanadium pentoxide V2O5, a catalytic metal impregnated on the surface of the catalyst, to form a Bronsted acid site. NOx reduction takes place on this acid site to form nitrogen and water. The spent -OH site is restored to -OH via oxidation to repeat the catalytic cycle. Once the vanadium site can no longer revert back into the -1-5 oxidative state, then that site is no longer active for NO reduction. Figure 17.7 shows the catalytic cycle for the SCR reactions. 

Enhanced imaging of several dairy products has been demonstrated through the application of a relatively elaborate preparative technique in combination with a cold-field emission scanning electron microscope (FESEM) [86], The preparative methods include a metal-impregnation technique, termed tannin-ferrocyanide-osmium (TA-F-O, Figure 21), which was adapted from Hirano et al. [87]. 

Bowden, F. P. Frictional properties of porous metal impregnated with plastic. Research (London) 3, 147—168 (1950). 

In order to visualize the process of non-wetting fluid injection Wood s metal Porosimetry was used [11-16], Wood s metal Impregnation technique is based on the same principles as Mercury Porosimetry, i.e., an immiscible,... 

Since the method of metal impregnation will also have a large impact on the profile of vanadium deposition of the catalyst, we clearly need to review this aspect of catalyst testing. Via cyclic metal impregnation and catalyst deactivation, we can approach "Real-World" conditions far better. (Table VII.)... 

The route of catalyst deactivation via a cyclic metal impregnation and deactivation method has produced significant improvements in approaching realistic vanadium and nickel profiles over the catalyst particles. From electron microprobe analyses of Ni and V loaded catalyst it has been established that after pore volume saturation, Ni and V are rather homogeneously distributed over the catalyst. 

Properties Mitchell Method Cyclic Metals Impregnation Cyclic Propylene Steam... 

Figure 5. Small-pore silica-alumina catalyst after metal impregnation...

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