Unsteady processes and aerosol catalysis

Glikin, M. A.; Kutakova, D.A.; Prin, E.

doi:10.1016/s0009-2509(99)00133-5

Cited by 8 publications

(7 citation statements)

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“…The use of nanosized clusters offers particular promise in this area. For instance, the presence of a nanosized iron oxide aerosol results in a 4−5 order increase in the rate of acetic acid oxidation in both laboratory and pilot scale experiments . In an application closer to that considered here, Nevskaya et al discovered that the use of laser-dispersed Ni nanostructures supported on Si/SiO 2 increased the rate of chlorinated hydrocarbon isomerization and olefin hydrogenation reactions by 2−4 orders of magnitude as compared with catalysis using a nickel film.…”

Section: Introductionmentioning

confidence: 71%

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)

2009

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The role of catalyst size and geometry in hydrocarbon decomposition is elucidated using density functional theory (DFT). For the sake of clarity, the work focuses on the dissociative adsorption of H 2 and CH 4 on an icosahedral Ni 13 cluster and a Ni(111) surface. Both H 2 and CH 4 adsorb molecularly at t 1 sites of the cluster. Subsequent dissociation leaves H atoms most strongly bound to c 3 sites, while CH 3 favors t 1 and b 2 sites. A hybrid linear synchronous transit/quadratic synchronous transit (LST/QST) transition state search algorithm allows transition state structures to be located and dissociation barriers to be obtained. The lowest H 2 and CH 4 dissociation barriers are estimated to be 3.5 and 9.9 kcal/mol, respectively. The corresponding values for Ni(111) are 0.6 and 21.4 kcal/mol. Molecular orbital (MO) theory is employed to explain how local distortion in the electronic structure of the nickel atoms lowers these barriers.

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Section: Introductionmentioning

confidence: 71%

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)

2009

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“…As a result, there were recorded particles size 8-10 nm in the reaction zone, and 100-200 nm after the reactor. This ensures consistently high activity catalyst [3].…”

Section: Introductionmentioning

confidence: 94%

“…After our publications [3,4] authors [5] studied the changes in activity of one nanoparticle of Ni in quartz. They studied using the example of the reaction methanation where nanoparticle of Ni remained in the reactor volume.…”

Section: Introductionmentioning

confidence: 99%

Specific control parameters in the technology of aerosol nanocatalysis

Glikina¹,

Glikin²,

Kudryavtsev³

2009

Annales UMCS, Chemistry

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This article shows the benefits of new technology for the implementation of gas-phase chemical reactions by aerosol nanocatalysis. The influence of new managing factors such as the concentration of catalyst, frequency, amplitude of motion of catalyst particles, dispersive material, etc. This enhances the process management and increases the rate of reaction per mass of catalyst in the 104-106 times. The selectivity of chemical transformations increases by 10-20%. Sometimes, new valuable products of the reaction are formed.

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“…A systematic search for technological solutions free from the above limitations has led to the creation of a new method for conducting heterogeneous catalytic reactions in the gaseous phase (Glikin et al 1997). This method is based on the use of a finely milled active material as a catalyst in the reactor where it is present as an aerosol of micro-and nano-particles.…”

Section: A New Direction For Catalyst Technologymentioning

confidence: 99%

A New Way to Increase Catalyst Activity

Glikin¹,

Kutakova²,

Glikina³

et al. 2001

Adsorption Science & Technology

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ABSTRACT:A new method for conducting a heterogeneous catalytic reaction in the gaseous phase is discussed. It eliminates the use of carriers and allows catalysis to be conducted via an aerosol of finely milled active catalytic materials. Problems associated with the strength and thermal stability of catalysts are thereby avoided. A high and constant catalytic activity is ensured for the aerosol catalyst by integrating the chemical reaction zone and the mechanical treatment zone. Thus, solid particles that move with the reactant flow or special devices that allow mechanical treatment of the catalyst particles may be located in the reactor. Such aerosol catalysis has been tested in processes involving partial and complete oxidation, recovery, vinylation, chlorination and dechlorination. Relative to traditional systems, i.e. placement of the active catalytic active material on the carrier, the reaction rate was increased by 4-5 orders of magnitude. The production of catalysts and the implementation of chemical reactions are thereby both simplified simultaneously.

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Unsteady processes and aerosol catalysis

Cited by 8 publications

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Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)

Specific control parameters in the technology of aerosol nanocatalysis

A New Way to Increase Catalyst Activity

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Unsteady processes and aerosol catalysis

Cited by 8 publications

References 0 publications

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H2 and CH4: Ni13 versus Ni(111)

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H2 and CH4: Ni13 versus Ni(111)

Specific control parameters in the technology of aerosol nanocatalysis

A New Way to Increase Catalyst Activity

Contact Info

Product

Resources

About

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)

Influence of Nickel Catalyst Geometry on the Dissociation Barriers of H₂ and CH₄: Ni₁₃ versus Ni(111)