File Name: practical catalytic hydrogenation techniques and applications .zip
With the accelerating industrialization, urbanization process, and continuously upgrading of consumption structures, the CO2 from combustion of coal, oil, natural gas, and other hydrocarbon fuels is unbelievably increased over the past decade. As an important carbon resource, CO2 gained more and more attention because of its converting properties to lower hydrocarbon, such as methane, methanol, and formic acid.
Transition metal-based bimetallic catalysts for the chemoselective hydrogenation of furfuraldehyde. Jorge J. In this work, the liquid-phase chemoselective hydrogenation of furfural was studied, employing Pt, Rh and Ni-based catalysts. Bimetallic systems, containing different amounts of tin, were obtained by means of controlled surface reactions between a monometallic catalyst and Sn C 4 H 9 4. The results obtained when monometallic catalysts were employed suggest a relationship between metal properties and the activity and selectivity obtained. The addition of tin has different effects on the three systems, both in terms of conversion and selectivity. Keywords: furfural, furfuryl alcohol, hydrogenation, bimetallic catalysts, PtSn.
Cuixian Yang a , Andrew R. Teixeira a , Yanxiang Shi a , Stephen C. E-mail: kfjensen mit. Recent advancements in micro-flow technologies and a drive toward more efficient, greener and safer processes have led to a renaissance in flow-chemistry for pharmaceutical production. In this work, we demonstrate the use of a stabilized Pd nanoparticle-organic-silica catalyst to selectively catalyze the hydrogenation of N nitrophenyl nicotinamide, a functionalized active pharmaceutical ingredient API surrogate. A kinetic analysis has revealed that the surface catalyzed hydrogenation progresses through a condensation mechanism whereby an azo dimer intermediate is formed and rapidly consumed. Finally, a parametric study was performed at various pressures, temperatures, residence times and flow regimes to achieve quantitative chemoselective conversion of the nitroarene to the corresponding primary amine.
The hydrogenation of fats and oils and their oleochemical derivatives such as fatty acids, fatty acid esters and fatty nitriles has proven to be a very useful and versatile way to modify these starting materials. This chapter will be limited to discussing exclusively the hydrogenation of carbon-carbon double bonds. Hydrogenation or the addition of hydrogen to the double bonds, allows the processor to modify the properties by removing some of the double bonds. He can do this to a limited but not unimportant extent, selectively. Selectivity is therefore another aspect used in fat modification by hydrogenation.
Practical catalytic hydrogenation: Techniques and applications. By Morris Freifelder, Wiley‐Interscience, New York, N.Y., xxii + pp. 16 × cm.
Size effect plays a crucial role in catalytic hydrogenation. The highly dispersed ultrasmall clusters with a limited number of metal atoms are one candidate of the next generation catalysts that bridge the single-atom metal catalysts and metal nanoparticles. However, for the unfavorable electronic property and their interaction with the substrates, they usually exhibit sluggish activity. Taking advantage of the small size, their catalytic property would be mediated by surface binding species.
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