Air oxidation of propylene by supported copper phthalocyanine

Ragaini, V.; Saravalle, R.

doi:10.1007/bf02070893

Cited by 6 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is widely agreed that both diolefin and olefin hydrogenation/isomerization proceed via hydrogen atom addition on metal surfaces. [24][25][26] In fact, the high activity of butene reactions is limited to metals (e.g., Pt, Pd, Rh, Ni) which dissociate hydrogen molecules at low temperatures. The hydrogen spillover model includes a postulated source of hydrogen atoms for accelerating reaction at sites (i.e., FeCe) which cannot independently dissociate hydrogen.…”

Section: Discussionmentioning

confidence: 99%

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Chang

Phillips

1997

Langmuir

View full text Add to dashboard Cite

In an effort to better understand the excellent synergism of certain physical mixtures of supported catalysts for the 1-butene double bond shift described previously, the butadiene hydroisomerization selectivity/activity of the same mixtures was studied. Limited activity/selectivity synergism for the hydroisomerization of butadiene was measured for physical mixtures of FeCe/Grafoil (alloy) and Pt/Grafoil or Pd/Grafoil (noble metal). A high degree of synergism was noted for mixtures in which the ratio of alloy to noble metal was less than about 20:1. Additions of alloy to mixtures which increased the ratio to values higher than 20 did not change the activity or selectivity. For Pd/Grafoil containing mixtures both activity and selectivity synergism could be explained completely on the basis of a hydrogen spillover model. For example, the limit in activity synergism was ascribed to the depletion of hydrogen atoms away from palladium centers (radial gradient around each noble metal particle) due to the use of these atoms in hydrogenation of butadiene on FeCe particles. In contrast, to explain the nonequilibrium ratio of 2-butenes in platinum-containing mixtures, it is necessary to hypothesize two processes: both hydrogen spillover and bifunctional catalysis.

show abstract

Section: Discussionmentioning

confidence: 99%

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Chang

Phillips

1997

Langmuir

View full text Add to dashboard Cite

show abstract

“…Extensive investigations have been made for the catalytic DBM of n-butenes on noble metal catalysts. [6][7][8][9][10][11][12] The mechanism of the reaction can be referred from the literature 6 where the paths for additionabstraction (AD-AB) mechanism (alkyl-reversal) and abstraction-addition (AB-AD) mechanism (π-allylic intermediate) are reported. In the two mechanisms, hydrogen abstraction, addition, and transfer processes take place on the metal catalysts.…”

Section: Mechanism Of 1-butene Isomerization On Mo 2 N/γ-al 2 Omentioning

confidence: 99%

“…The double-bond isomerization of butenes, a typical and important isomerization reaction, has been widely investigated on a variety of catalysts, including solid acid catalysts, [1][2][3] base catalysts, 4,5 and noble metal catalysts. [6][7][8][9][10][11][12] Transition metal oxides, MoO 3 and WO 3 , are also used to catalyze the isomerization of butenes. [13][14][15] The mechanisms of double-bond migration (DBM) on these catalysts are quite different.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Isomerization of 1-Butene on Mo₂N/γ-Al₂O₃Catalyst Studied by in Situ FT-IR Spectroscopy

Ying

et al. 2001

J. Phys. Chem. B

View full text Add to dashboard Cite

The adsorption and reaction of 1-butene on Mo2N/γ-Al2O3 catalyst have been studied by in situ FT-IR spectroscopy at low temperatures, 145 K to room temperature (RT). The adsorbed 1-butene can be converted to cis- and trans-2-butenes below 201 K on Mo2N/γ-Al2O3 catalyst. The result of coadsorption of 1-butene with CO indicates that 1-butene is mainly adsorbed on the surface Mo sites of the nitrided catalyst. No isomerization of adsorbed 1-butene and 2-butenes on reduced passivated Mo2N/γ-Al2O3 sample below RT is observed. It is suggested that the double-bond migration (DBM) of 1-butene is mainly proceeded via an alkyl species on the surface cus Mo sites of Mo2N/γ-Al2O3 catalyst. This resembles the behaviors of Group VIII metals in the isomerization of butenes. The incorporated nitrogen atoms are proposed to devote to both the valence state of surface Mo sites and the interaction between 1-butene and the nitrided catalyst. A possible path from 1-butene conversion to 2-butenes on Mo2N/γ-Al2O3 catalyst is proposed.

show abstract

Metal Complexes of Phthalocyanines

Boucher

1979

Coordination Chemistry of Macrocyclic Compounds

View full text Add to dashboard Cite

Air oxidation of propylene by supported copper phthalocyanine

Cited by 6 publications

References 6 publications

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Low-Temperature Isomerization of 1-Butene on Mo₂N/γ-Al₂O₃Catalyst Studied by in Situ FT-IR Spectroscopy

Metal Complexes of Phthalocyanines

Contact Info

Product

Resources

About

Air oxidation of propylene by supported copper phthalocyanine

Cited by 6 publications

References 6 publications

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Catalytic Synergism in Physical Mixtures of Supported Iron−Cerium and Supported Noble Metal for Hydroisomerization of 1,3-Butadiene

Low-Temperature Isomerization of 1-Butene on Mo2N/γ-Al2O3Catalyst Studied by in Situ FT-IR Spectroscopy

Metal Complexes of Phthalocyanines

Contact Info

Product

Resources

About

Low-Temperature Isomerization of 1-Butene on Mo₂N/γ-Al₂O₃Catalyst Studied by in Situ FT-IR Spectroscopy