The structure of the copper/zinc oxide catalyst by an in-situ EXAFS study

1985 ◽  
Vol 89 (26) ◽  
pp. 5671-5676 ◽  
Author(s):  
Kazuyuki Tohji ◽  
Yasuo Udagawa ◽  
Takanori Mizushima ◽  
Akifumi Ueno
Keyword(s):  
Zinc Oxide ◽  
Oxide Catalyst ◽  
Copper Zinc ◽  
Exafs Study ◽  
Copper Zinc Oxide ◽  
In Situ Exafs

Development of a kinetic model for alcohol synthesis over a cesium-promoted copper/zinc oxide catalyst

1991 ◽  
Vol 30 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Kevin J. Smith ◽  
Chyi Woei Young ◽  
Richard G. Herman ◽  
Kamil Klier
Keyword(s):  
Zinc Oxide ◽  
Kinetic Model ◽  
Oxide Catalyst ◽  
Alcohol Synthesis ◽  
Copper Zinc ◽  
Copper Zinc Oxide

scholarly journals Bridging the Time Gap: A Copper/Zinc Oxide/Aluminum Oxide Catalyst for Methanol Synthesis Studied under Industrially Relevant Conditions and Time Scales

2016 ◽  
Vol 128 (41) ◽  
pp. 12900-12904 ◽  
Author(s):  
Thomas Lunkenbein ◽  
Frank Girgsdies ◽  
Timur Kandemir ◽  
Nygil Thomas ◽  
Malte Behrens ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Aluminum Oxide ◽  
Time Scales ◽  
Methanol Synthesis ◽  
Oxide Catalyst ◽  
Aluminum Oxide Catalyst ◽  
Copper Zinc ◽  
Time Gap ◽  
Copper Zinc Oxide

Copper-zinc oxide catalyst. Part II. Preparation, IR characterization and thermal properties of novel bimetallic precursors

1996 ◽  
Vol 276 ◽  
pp. 209-220 ◽  
Author(s):  
Juraj Černák ◽  
Jozef Chomič ◽  
Charles Kappenstein ◽  
Rachid Brahmi ◽  
Daniel Duprez
Keyword(s):  
Zinc Oxide ◽  
Thermal Properties ◽  
Oxide Catalyst ◽  
Copper Zinc ◽  
Copper Zinc Oxide

Modeling, Simulation and Experimental Study of Methanol Synthesis for 11C Radiopharmaceuticals

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Erik J van Lier ◽  
Dusko Posarac ◽  
K. E. Kwok ◽  
C. Jim Lim
Keyword(s):  
Carbon Monoxide ◽  
Zinc Oxide ◽  
Liquid Phase ◽  
Gas Phase ◽  
Methanol Synthesis ◽  
Oxide Catalyst ◽  
Specific Activity ◽  
Synthesis Process ◽  
Copper Zinc ◽  
Copper Zinc Oxide

Carbon-11 radiopharmaceuticals are gaining an increasing importance in positron emission tomography due to their importance in diagnostic medicine. The most wide spread method of production of these radiopharmaceuticals is by methylation of an appropriate precursor with the highly reactive [11C]methyl iodide. Conventional synthesis of this intermediate involves liquid phase synthesis of [11C]methanol, which is the step that limits the specific activity of the final product. To avoid the loss of specific activity, a catalytic gas phase methanol synthesis process was evaluated. In this procedure, [11C]carbon monoxide would be reduced to [11C]methanol using a copper zinc oxide catalyst in the presence of hydrogen.In this study, a reactor to catalytically convert 50 ppm carbon monoxide to methanol was developed. A copper zinc oxide catalyst was prepared by a co-precipitation method. The catalyst was activated by reduction with hydrogen and passivated with oxygen prior to methanol synthesis. The effects of temperature, pressure and flowrate on the conversion of carbon monoxide to methanol were studied. The experimental results were used in conjunction with a commercially available process simulator to fit a kinetic model for methanol synthesis from carbon monoxide. This model was used to determine optimal operating conditions for this reactor and predicts a 60% conversion of [11C]carbon monoxide to [11C]methanol. These findings suggest that gas phase [11C]methanol synthesis is a viable alternative to the conventional liquid phase method, meriting further studies with carbon-11.

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