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Selectivity catalytic

Engstrom J R, Goodman D Wand Weinberg W H 1986 Hydrogenolysis of n-butane over the (111) and (110)-(1 2) surfaces of iridium a direct correlation between catalytic selectivity and surface structure J. Am. Chem. Soc. 108 4653... [Pg.955]

DMN can be produced by alkylating naphthalene or 2-methylnaphthalene at 250—450°C over ZeoHte catalysts (102,103). However, no commercial technology by this synthetic route had been developed as of 1991, primarily because of low catalytic selectivity. [Pg.53]

Finally we mention in this section the non-catalytic selective bromination of aniline by the application of a zeolite pre-loaded with Bt2 as a slow release reagent (ref. 27). Aniline, dissolved in CCI4 was treated with Br2 adsorbed onto various zeolites and zeolite CaA was found to be most selective for monosubstitution (92%). The addition of organic bases improved the performance, probably due to scavenging of HBr. Also the toluidines could be monobrominated with this system with >95% selectivity. [Pg.212]

Data accunnilated in the last years on the Ft/Cu alloys, in particular on the 1) surface composition, 2) electronic structure, 3) adsorption properties, 4) catalytic behaviour and 5) various side effects, make a detailed discussion possible of the catalytic selectivity and mechanism of hydrocarbon reactions. [Pg.267]

The chemistry at the electrified aqueous/metal interface is quite fascinating, as its structure, properties, and dynamics can significantly influence reaction energetics, dictate the kinetics that control catalytic selectivity, and open up novel reaction pathways and mechanisms. [Pg.123]

Catalytic selectivity does not appear to correlate with the (average) M-M distance (in the absence of any ligands in the cavity) or, more broadly, the separation of the centers of the two porphyrins (Ct-Ct) the best ORR catalysts are... [Pg.664]

The Fe-only form of these metalloporphyrins is a highly selective ORR catalyst when adsorbed on a graphite or Au electrode. It operates at an overpotential of about 0.55 V at pH 7 and av >3.9 (Fig. 18.19) and retains these characteristics for >10 mrnovers the catalytic selectivity is independent of the amount of deposited catalyst. [Pg.680]

S. T. Oyama and J. W. Hightower (eds), Catalytic Selective Oxidation, ACS Symposium Series, Vol. 523, American Chemical Society, Washington, DC, 1992. [Pg.102]

Presently the catalytic selective NOx reduction by ammonia is efficient and widespread through the world for stationary sources. The remarkable beneficial effect of 02 for the complete reduction of NO into nitrogen is usually observed between 200 and 400°C. However, such a technology is not applicable for mobile sources due to the toxicity of ammonia and vanadium, which composes the active phase in vanadia-titania-based catalysts. Main drawbacks related to storing and handling of ammonia as well as changes in the load composition with subsequent ammonia slip considerably affect the reliability of such a process. On the other hand, the use of urea for heavy-duty vehicles is of interest with the in situ formation of ammonia. [Pg.308]

Both the Co and the Fe systems have very similar chemistry for the 1 1 codimerization reaction. Although they are almost identical in catalytic selectivity, they do differ in other catalytic properties, especially the rate of reaction (66). In practice, the Co system is superior to the Fe system our discussion will therefore focus mainly on the former system. [Pg.309]

NExSELECT A catalytic, selective hydrogenation process developed by Neste Oy. Operated inPorvoo, Finland, since 1996. [Pg.188]

Fig. 47. Catalytic selectivity as a function of Ti content in Ti-MCM-41 for 1-naphthol hydroxylation with aqueous H202. H202 selectivity (mol%) = (number of moles of H202 utilized in product (1, 4-naphthoquinone, 1,4-dihydroxynaphthalene and 1,2-dihydroxynaphthalene) formation/-number of moles of H202 fed) X 100 [data from Chaudhari et al. (277)]. Fig. 47. Catalytic selectivity as a function of Ti content in Ti-MCM-41 for 1-naphthol hydroxylation with aqueous H202. H202 selectivity (mol%) = (number of moles of H202 utilized in product (1, 4-naphthoquinone, 1,4-dihydroxynaphthalene and 1,2-dihydroxynaphthalene) formation/-number of moles of H202 fed) X 100 [data from Chaudhari et al. (277)].
In addition to the universal concern for catalytic selectivity, the following reasons could be advanced to argue why an electrochemical scheme would be preferred over a thermal approach (i) There are experimental parameters (pH, solvent, electrolyte, potential) unique only to the electrode-solution interface which can be manipulated to dictate a certain reaction pathway, (ii) The presence of solvent and supporting electrolyte may sufficiently passivate the electrode surface to minimize catalytic fragmentation of starting materials. (iii) Catalyst poisons due to reagent decomposition may form less readily at ambient temperatures, (iv) The chemical behavior of surface intermediates formed in electrolytic solutions can be closely modelled after analogous well-characterized molecular or cluster complexes (1-8). (v)... [Pg.1]

Zeolite ZSM-5. Zeolite catalytic selectivity is usually related to channel size, but for many reactions catalytic activity and selectivity also are influenced by the number of acid sites that contact reactant molecules. Since the acidity of a local region within a zeolite crystal is directly related to the aluminum concentration in that region 14], it is important to know the... [Pg.317]


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Absorption Plus Selective Catalytic Reduction

Acrolein catalytic selectivity

Adsorption Equilibria and Catalytic Selectivity

Alkene metathesis, catalytic selective

Alkenes oxidation, catalytic selectivity

Ammonia distribution, selective catalytic

Ammonia selective catalytic reduction

Annex 3.1 Catalytic Efficiency and Selectivity

Butadiene, catalytic selectivity

CATALYTIC SELECTIVE OXIDATION

CATALYTIC SELECTIVE OXIDATION Oxygenation reactions catalyzed

CATALYTIC SELECTIVE OXIDATION Volta

CATALYTIC SELECTIVE OXIDATION cyclooctene epoxidation

Carbohydrates selective catalytic oxidation

Carbohydrates selective catalytic oxidation of, employing platinum catalysts

Catalyst selective catalytic

Catalysts and Reactors for Selective Catalytic Reduction of NO

Catalysts platinum, in selective catalytic oxidation

Catalysts platinum, in selective catalytic oxidation of carbohydrates

Catalytic Selectivity of CYP

Catalytic activity olefin selectivity

Catalytic activity product selectivity

Catalytic activity selectivity

Catalytic asymmetric synthesis enzyme selection

Catalytic behavior selective oxidation

Catalytic cracking, general selective extraction

Catalytic distillation process selection

Catalytic fast pyrolysis aromatics selectivity

Catalytic hydrogenation selectivity

Catalytic processes, selectivity

Catalytic reactions amination catalysts, selection

Catalytic reactions involving selectivity

Catalytic reagents developing more selective

Catalytic selective

Catalytic selective

Catalytic selectivity effect

Catalytic selectivity effect surface reconstruction

Catalytic selectivity, changing

Catalytic selectivity, electrochemical

Catalytic selectivity, electrochemical methods

Catalytic zeolite-membrane reactors for selectivity enhancement

Conformation selective catalytic oxidation

Control of Selectivity through Kinetic Coupling between Heterogeneous Catalytic Cycles

Correlations of the catalyst microstructure with catalytic activity and selectivity

Cross-selective catalytic reactions

Cyclopropanation selected catalytic results

Effect of interparticle mass transfer on catalytic selectivity

Fast selective catalytic reduction

Fast selective catalytic reduction mechanism

Fluid catalytic cracking, reactor selection

Fluid cracking catalysts catalytic selectivity

Fluorinated Ligands for Selective Catalytic Reactions

Heterogeneous catalytic kinetics selectivity

Heterogeneous-homogeneous catalytic limiting selectivity

Heyns, K., and Paulsen H., Selective Catalytic Oxidation of Carbohydrates

Hydrocarbon-assisted selective catalytic reduction

Hydrocarbon-selective catalytic reduction

Hydrogen-Selective Catalytic Reduction (H2-SCR)

Hydrogen-selective catalytic reduction

Hydrogenation catalytic performance, selectivity

Hydrogenation, catalytic selective

Hydrogenation, catalytic, alkene selectivity

Hydrogenation, catalytic, alkene selectivity with

Hydrogenolysis catalytic selectivity

INDEX catalytic selectivity effect

Kinetic parameters selective catalytic

Membrane reactors catalytic selective

Multifunctional Materials in Selective Catalytic Oxidation

NO selective catalytic reduction

Nitric Acid Selective Catalytic Reduction

Nitroaldol reaction, anti-selective catalytic

Nitroaldol reaction, anti-selective catalytic asymmetric

Non-Selective Catalytic Reduction

Oxidation selective catalytic, of carbohydrates

Poison selective catalytic

Polymer selective catalytic reaction

Polysaccharides selective catalytic oxidation

Propylene catalytic selectivity

Reduction, selective catalytic

Selected Applications of the Catalytic Enantioselective Allylation Reaction in Natural Product Synthesis

Selected catalytic properties

Selection catalytic

Selection catalytic elution

Selection for catalytic activity

Selective Catalytic Oxidation H2O2 formation

Selective Catalytic Reduction The SCR Process

Selective Catalytic Reduction acid plants

Selective Catalytic Reduction approaches

Selective Catalytic Reduction plasma

Selective Catalytic Reduction process

Selective catalytic conversion

Selective catalytic membrane

Selective catalytic membrane process

Selective catalytic oxidation ammonia

Selective catalytic oxidation employing platinum catalysts

Selective catalytic oxidation material

Selective catalytic oxidation of, employing platinum catalysts

Selective catalytic oxidation over highly

Selective catalytic oxidation titanium silicate

Selective catalytic reagents

Selective catalytic reagents acetylene

Selective catalytic reduction (SCR

Selective catalytic reduction ammonia oxidation

Selective catalytic reduction catalyst

Selective catalytic reduction catalyst modules

Selective catalytic reduction catalyst sizing

Selective catalytic reduction challenges

Selective catalytic reduction chemical

Selective catalytic reduction chemistry

Selective catalytic reduction component

Selective catalytic reduction deNOx

Selective catalytic reduction deactivation

Selective catalytic reduction deactivation causes

Selective catalytic reduction description

Selective catalytic reduction design

Selective catalytic reduction design considerations

Selective catalytic reduction direct synthesis

Selective catalytic reduction exchange

Selective catalytic reduction fast reaction

Selective catalytic reduction filters

Selective catalytic reduction filtration

Selective catalytic reduction hydrothermal

Selective catalytic reduction of NOX

Selective catalytic reduction operating conditions

Selective catalytic reduction oxidation

Selective catalytic reduction pore size

Selective catalytic reduction ranges

Selective catalytic reduction reactions

Selective catalytic reduction standard reaction

Selective catalytic reduction synthesis methods

Selective catalytic reduction with ammonia

Selective oxidation catalysts catalytic behavior

Selectivity of catalytic activity

Selectivity, catalytic performance

Selectivity, in catalytic hydrogenation

Shape-selective catalysts, example catalytic material

Structured Catalytic Reactors for Selective Oxidations

Urea and NH3 Selective Catalytic Reduction

Zeolite catalytic selectivity, related

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