Catalytic synthesis of methanol from CO/H/sub 2/. I. Phase composition, electronic properties, and activity of the Cu/ZnO/M/sub 2/O/sub 3/ catalysts
Abstract
The catalytic activity of the low pressure Cu/ZnO/Al/sub 2/O/sub 3/ or Cr/sub 2/O/sub 3/ catalysts for methanol synthesis resides in the Cu/ZnO system. No special pore distribution or presence of crystalline phases such as spinels is necessary for selectivity to methanol. The Cu/ZnO system stabilizes a black substance which has been identified as a Cu/sup I/ solution in ZnO. A synthesis mechanism is proposed whereby the Cu/sup I/ centers chemisorb and activate carbon monoxide and the ZnO surface activates hydrogen. Catalyst deactivation in the CO/H/sub 2/ mixture is explained as the reduction of Cu/sup I/ to inactive copper metal, and the promotion effect of O/sub 2/, H/sub 2/O, and CO/sub 2/ as a maintenance of oxidation potential high enough to keep the copper in the active Cu/sup I/ state. Poisoning by hydrogen sulfide and HCl is attributed to irreversible heteropolar chemisorption of H/sub 2/S and HCl with blocking of the Cu/sup I/ centers by the SH/sup -/ and Cl/sup -/ groups. 4 tables, 11 figs., 58 references.
- Authors:
-
- Lehigh Univ., Bethlehem, PA
- Publication Date:
- OSTI Identifier:
- 6715442
- Report Number(s):
- CONF-780305-P1
Journal ID: CODEN: ACPCA
- Resource Type:
- Conference
- Journal Name:
- Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States)
- Additional Journal Information:
- Journal Volume: 23:2; Conference: American Chemical Society conference, Anaheim, CA, USA, 12 Mar 1978
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 10 SYNTHETIC FUELS; COPPER ALLOYS; CATALYTIC EFFECTS; METHANOL; SYNTHESIS; ZINC OXIDES; ALUMINIUM OXIDES; CARBON DIOXIDE; CARBON MONOXIDE; CHEMICAL REACTION KINETICS; CHEMISORPTION; CHROMIUM OXIDES; HYDROGEN; SYNTHESIS GAS; ALCOHOLS; ALLOYS; ALUMINIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM COMPOUNDS; CRYOGENIC FLUIDS; ELEMENTS; FLUIDS; GASES; HYDROXY COMPOUNDS; KINETICS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SEPARATION PROCESSES; SORPTION; TRANSITION ELEMENT COMPOUNDS; ZINC COMPOUNDS; 090221* - Alcohol Fuels- Chemical Synthesis- (1976-1989)
Citation Formats
Herman, R G, Klier, K, Simmons, G W, Finn, B P, Bulko, J B, and Kobylinski, T P. Catalytic synthesis of methanol from CO/H/sub 2/. I. Phase composition, electronic properties, and activity of the Cu/ZnO/M/sub 2/O/sub 3/ catalysts. United States: N. p., 1978.
Web.
Herman, R G, Klier, K, Simmons, G W, Finn, B P, Bulko, J B, & Kobylinski, T P. Catalytic synthesis of methanol from CO/H/sub 2/. I. Phase composition, electronic properties, and activity of the Cu/ZnO/M/sub 2/O/sub 3/ catalysts. United States.
Herman, R G, Klier, K, Simmons, G W, Finn, B P, Bulko, J B, and Kobylinski, T P. 1978.
"Catalytic synthesis of methanol from CO/H/sub 2/. I. Phase composition, electronic properties, and activity of the Cu/ZnO/M/sub 2/O/sub 3/ catalysts". United States.
@article{osti_6715442,
title = {Catalytic synthesis of methanol from CO/H/sub 2/. I. Phase composition, electronic properties, and activity of the Cu/ZnO/M/sub 2/O/sub 3/ catalysts},
author = {Herman, R G and Klier, K and Simmons, G W and Finn, B P and Bulko, J B and Kobylinski, T P},
abstractNote = {The catalytic activity of the low pressure Cu/ZnO/Al/sub 2/O/sub 3/ or Cr/sub 2/O/sub 3/ catalysts for methanol synthesis resides in the Cu/ZnO system. No special pore distribution or presence of crystalline phases such as spinels is necessary for selectivity to methanol. The Cu/ZnO system stabilizes a black substance which has been identified as a Cu/sup I/ solution in ZnO. A synthesis mechanism is proposed whereby the Cu/sup I/ centers chemisorb and activate carbon monoxide and the ZnO surface activates hydrogen. Catalyst deactivation in the CO/H/sub 2/ mixture is explained as the reduction of Cu/sup I/ to inactive copper metal, and the promotion effect of O/sub 2/, H/sub 2/O, and CO/sub 2/ as a maintenance of oxidation potential high enough to keep the copper in the active Cu/sup I/ state. Poisoning by hydrogen sulfide and HCl is attributed to irreversible heteropolar chemisorption of H/sub 2/S and HCl with blocking of the Cu/sup I/ centers by the SH/sup -/ and Cl/sup -/ groups. 4 tables, 11 figs., 58 references.},
doi = {},
url = {https://www.osti.gov/biblio/6715442},
journal = {Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States)},
number = ,
volume = 23:2,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 1978},
month = {Wed Mar 01 00:00:00 EST 1978}
}