Transformations of simple ethers on dehydrating catalysts Communication 3. Effect of surface acidity on catalytic activity

1982 ◽  
Vol 31 (4) ◽  
pp. 752-757
Author(s):  
A. A. Silakova ◽  
V. �. Vasserberg ◽  
G. I. Levi
Keyword(s):  
Catalytic Activity ◽  
Surface Acidity ◽  
Effect Of Surface

Effect of surface acidity on the catalytic activity and deactivation of supported sulfonic acids during dehydration of methanol to DME

2020 ◽  
Vol 44 (39) ◽  
pp. 16810-16820
Author(s):  
Rosanna Viscardi ◽  
Vincenzo Barbarossa ◽  
Daniele Mirabile Gattia ◽  
Raimondo Maggi ◽  
Giovanni Maestri ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Water Resistance ◽  
Surface Acidity ◽  
Acid Catalyst ◽  
Acid Sites ◽  
Sulfonic Acids ◽  
Effect Of Surface

Superiorty of the supported sulfonic acid catalyst in terms of the water resistance and efficiency of the acid sites compared to the commercial reference.

scholarly journals Effect of surface acidity of cyano-bridged polynuclear metal complexes on the catalytic activity for the hydrolysis of organophosphates

2018 ◽  
Vol 8 (18) ◽  
pp. 4747-4756 ◽  
Author(s):  
Hiroyasu Tabe ◽  
Chihiro Terashima ◽  
Yusuke Yamada
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Metal Complexes ◽  
Surface Acidity ◽  
Polynuclear Metal Complexes ◽  
Hydrolysis Of ◽  
Effect Of Surface

Heterogeneous catalysis of cyano-bridged polynuclear metal complexes was examined for the hydrolysis of toxic organophosphates. The surface acidity of cyano-bridged polynuclear metal complexes strongly effects on the catalytic activity.

Vanadium-Chromium Oxide: Effective Catalysts for Ammoxidation of 3-Picoline

2013 ◽  
Vol 634-638 ◽  
pp. 624-627 ◽  
Author(s):  
Feng Jiang ◽  
Wei Xu ◽  
Lei Niu ◽  
Guo Min Xiao
Keyword(s):  
Raman Spectroscopy ◽  
Catalytic Activity ◽  
Chromium Oxide ◽  
Atmospheric Pressure ◽  
High Selectivity ◽  
Surface Acidity ◽  
N2 Adsorption ◽  
Composite Oxide ◽  
Highly Active

Bulk vanadium-chromium oxide (VCrO) catalyst was prepared and characterized by N2 adsorption, XRD, NH3-TPD, H2-TPR, and Raman spectroscopy. XRD and Raman results showed that the VCrO catalyst was a kind of VV-CrIII composite oxide mainly consisted of crystalline V2O5 and CrVO4-Ⅲ (orthorhombic). NH3-TPD and H2-TPR results revealed that this catalyst had negligible surface acidity, and was easily reduced due to the formation of CrVO4-Ⅲ. Their catalytic activity was evaluated in the ammoxidation of 3-picoline to nicotinonitrile. Catalytic results showed that the bulk VCrO catalyst was highly active and selective; the nicotinonitrile selectivity and yield was up to 96.1%, 88.2% respectively at atmospheric pressure and 360 °C. The high selectivity was related closely to the low surface acidity of the catalyst.

Electron Donating, Acid-Base and Catalytic Properties of Perovskite-Type Mixed Oxides of Rare Earths

1995 ◽  
Vol 60 (6) ◽  
pp. 977-982
Author(s):  
S. Sugunan ◽  
V. Meera
Keyword(s):  
Catalytic Activity ◽  
Electron Donor ◽  
Rare Earths ◽  
Electron Affinity ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Surface Acidity ◽  
Electron Acceptors ◽  
Acid Base ◽  
Perovskite Type

The electron donor properties of perovskite-type mixed oxides (LaFeO3, PrFeO3, SmFeO3, LaCoO3, PrCoO3, SmCoO3, LaNiO3, PrNiO3 and SmNiO3) were studied based on the adsorption of electron acceptors exhibiting different electron affinity viz. 7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrachloro-1,4-benzoquinone, p-dinitrobenzene, and m-dinitrobenzene. The surface acidity/basicity of the oxides was determined using a set of Hammett indicators. The data were correlated with the catalytic activity of the oxides for the reduction of cyclohexanone with 2-propanol.

Catalytic aromatization of naphtha under methane environment: Effect of surface acidity and metal modification of HZSM-5

Fuel ◽  
2018 ◽  
Vol 223 ◽  
pp. 211-221 ◽  
Author(s):  
Jack Jarvis ◽  
Ashley Wong ◽  
Peng He ◽  
Qingyin Li ◽  
Hua Song
Keyword(s):  
Surface Acidity ◽  
Environment Effect ◽  
Catalytic Aromatization ◽  
Effect Of Surface

Surface acidity, catalytic activity and selectivity of some oxides supported on alumina

1988 ◽  
Vol 41 ◽  
pp. 1-11 ◽  
Author(s):  
Juan C. Yori ◽  
Juan C. Luy ◽  
Jose M. Parera
Keyword(s):  
Catalytic Activity ◽  
Surface Acidity
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