Reaction and surface characterization study of Zn/Cr-based higher-alcohol synthesis catalysts X: Effects of excess promoter loading on surface chemistry |
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| Authors: | William S Epling Gar B Hoflund and David M Minahan |
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| Institution: | (1) Department of Chemical Engineering, University of Florida, 32611 Gainesville, FL, USA;(2) Union Carbide Corporation, Technical Center, 3200 Kanawha Turnpike, 25303 South Charleston, WV, USA;(3) Present address: Goal Line Environmental Technologies, 11141 Outlet Drive, 37932 Knoxville, TN, USA |
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| Abstract: | Promoter loading level significantly affects the catalytic behavior of Zn/Cr spinel higher alcohol synthesis (HAS) catalysts.
In this study a 5.9 wt.% Pd-promoted Zn/Cr spinel with a 5 and 7 wt.% K promoter have been tested and compared. At 1500 psig
and 400°C, the catalyst containing 5 wt.% K results in the production of slightly more butanol, less methanol and more hydrocarbons.
Using ion scattering spectroscopy and X-ray photoelectron spectroscopy, differences are found between the two catalyst surfaces
which must be responsible for the differences in catalytic behavior. |
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| Keywords: | K-promoted Zn/Cr spinel catalysts higher alcohol synthesis isobutanol methanol synthesis gas |
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