Online citations, reference lists, and bibliographies.
Please confirm you are human
(Sign Up for free to never see this)
← Back to Search

Synergy Between Copper And Zinc Oxide During Methanol Synthesis. Transfer Of Activating Species

R. Burch, R. Chappell, S. Golunski
Published 1989 · Chemistry

Save to my Library
Download PDF
Analyze on Scholarcy
Share
The nature of the synergy between Cu and ZnO has been examined using temperature-programmed desorption and reaction techniques. Adsorption of CO–CO2–H2 on Cu/SiO2 and on ZnO/SiO2 results in the formation of surface intermediates which are distinguishable by different activation energies for their dissociation into CO2 and H2. A mixture of the two catalysts does not simply exhibit the characteristics of both components. After adsorption of the gas-feed on a physical mixture at 325 K, CO2 and H2 are desorbed separately. It is proposed that, during the dissociation of the species on the Cu surface, hydrogen can spill acoross the silica, causing the zinc oxide to become hydrided and hydroxylated. Further, if there is intimate contact between the phases, it could be envisaged that the hydroxyl species contribute to the creation of bidentate Cu-methanoates from CO2 and even CO. This would explain the observation that when CO–H2(at 101 325 Pa) is passed over the catalysts during programmed heating, a sample prepared by coprecipitation is the only one to generate methanol.



This paper is referenced by
10.1016/J.CRCI.2019.01.002
Improved Cu- and Zn-based catalysts for CO2 hydrogenation to methanol
D. Allam (2019)
10.1016/J.APCATB.2019.117971
Differences in bifunctionality of ZnO and ZrO2 in Cu/ZnO/ZrO2/Al2O3 catalysts in hydrogenation of carbon oxides for methanol synthesis
Imran Abbas (2019)
10.1002/ZAAC.201300356
How to Prepare a Good Cu/ZnO Catalyst or the Role of Solid State Chemistry for the Synthesis of Nanostructured Catalysts
M. Behrens (2013)
10.1023/A:1023588322846
On the Issue of the Active Site and the Role of ZnO in Cu/ZnO Methanol Synthesis Catalysts
J. Nakamura (2003)
10.1007/BF00806562
The synergy between Cu and ZnO in methanol synthesis catalysts
Y. Kanai (1996)
10.1039/FT9908603151
Gas-phase transport of hydrogen atoms in methanol synthesis over copper/zinc oxide catalysts?
M. Spencer (1990)
10.1007/BF00808597
Spectroscopic evidence for adsorption sites located at Cu/ZnO interfaces
Julian E. Bailie (1995)
10.1016/S1381-1169(01)00416-2
Methanol decomposition over copper particles incorporated in the interlayer regions of zinc aluminum silicate hydroxide
K. Hashimot (2002)
10.1039/A700747G
Junctions between CuOx and ZnOy in sensors for CO and catalystsfor CO hydrogenation
B. J. Miller (1997)
10.1021/JP206065Y
Effect of Surface Hydroxyls on CO2 Hydrogenation Over Cu/γ-Al2O3 Catalyst: A Theoretical Study
R. Zhang (2011)
10.1016/S1386-1425(03)00255-5
Characterization of zinc hydroxynitrates by diffuse reflectance infrared spectroscopy--structural modifications during thermal treatment.
Cyril Chouillet (2004)
10.1007/BF00769666
An in situ high pressure FT-IR study of CO2/H2 interactions with model ZnO/SiO2, Cu/SiO2 and Cu/ZnO/SiO2 methanol synthesis catalysts
G. Millar (1992)
10.1016/S0926-860X(00)00876-0
Production of hydrogen by partial oxidation of methanol over Cu/ZnO catalysts prepared by microemulsion technique
Johan Agrell (2001)
10.1016/S0926-860X(99)00313-0
The chemical modification seen in the Cu/ZnO methanol synthesis catalysts
T. Fujitani (2000)
10.1016/0039-6028(94)91157-6
The chemisorption and reactions of formic acid on Cu films on ZnO (0001)-O
A. Ludviksson (1994)
10.1007/BF00321943
On the hydrogenation of CO and CO2 over copper/zirconia and palladium/zirconia catalysts
C. Schild (1991)
10.1016/S0167-2991(98)80808-2
Mechanistic studies of methanol synthesis from CO2/H2 on Cu/ZnO/SiO2 catalyst
Dong-keun Lee (1998)
10.1016/J.CATCOM.2012.01.031
By-product co-feeding reveals insights into the role of zinc on methanol synthesis catalysts
M. Santiago (2012)
10.1016/S0167-2991(06)81923-3
Deuteration of zeolitic hydroxyl groups in the presence of platinum — Evidence for a spillover reaction pathway
U. Roland (1995)
5.5 Methanol Chemistry
Edward L. Kunkes (2013)
10.1039/FT9908602683
The role of copper and zinc oxide in methanol synthesis catalysts
R. Burch (1990)
10.1016/S0167-2991(08)64468-7
Catalytic Activity of Reduced CuxZn(1-x)O and CuO/CuxZn(1-x)O in CO2/H2 Reactions
D. Stirling (1993)
10.1016/0926-860X(93)80250-T
Intermediate species on zirconia supported methanol aerogel catalysts: II. Adsorption of carbon monoxide on pure zirconia and on zirconia containing zinc oxide
D. Bianchi (1993)
10.1080/00268979200101721
A combined infrared, temperature programmed desorption and temperature programmed reaction spectroscopy study of CO2 and H2 interactions on reduced and oxidized silica-supported copper catalysts
G. Millar (1992)
10.1016/S0167-2991(96)80350-8
The effect of zinc oxide in Raney copper catalysts on methanol synthesis, water gas shift, and methanol steam reforming reaction
D. Wang (1996)
10.1016/0304-5102(92)80073-P
Pulse-chromatographic N2O titration of the copper surface area on CuZnOMeOx catalysts in connection with their hydrogen adsorption
H. Berndt (1992)
10.1016/S0167-2991(08)64449-3
Hydrogenation of CO2 Over Copper, Silver and Gold/Zirconia Catalysts: Comparative Study of Catalyst Properties and Reaction Pathways
A. Baiker (1993)
10.1016/0926-860X(92)80196-J
Investigation of the reactions of acetaldehyde on promoted rhodium catalysts
R. Burch (1992)
10.1002/14356007.O05_O03
Heterogeneous Catalysis and Solid Catalysts, 3. Industrial Applications
O. Deutschmann (2011)
10.1016/J.IJHYDENE.2019.04.206
Insights into the role of Zn and Ga in the hydrogenation of CO2 to methanol over Pd
Raydel Manrique (2019)
10.1016/0166-9834(91)80008-K
Support effects in methanol synthesis over copper-containing catalysts
W. Robinson (1991)
10.1007/BF00764730
Methanol synthesis over Cu/SiO2 catalysts
J. Robbins (1991)
See more
Semantic Scholar Logo Some data provided by SemanticScholar