Effect of ZrO2, Al2O3 and La2O3 on cobalt–copper catalysts for higher alcohols synthesis
- Louisiana State Univ., Baton Rouge, LA (United States)
In this work three cobalt–copper catalysts singly promoted with La, Zr, or Al were studied for catalytic conversion of syngas to higher alcohols. The properties of the promoted catalysts have been characterized by TPR, XRD, XPS and BET. CO hydrogenation was carried out in a plug-flow reactor under 30 bar, GHSV = 36000 scc/gcat/h, H2/CO = 2, and 250 °C at differential conversions. The catalyst activity and selectivity to higher alcohols are greatest on CuCoLa2O3 :ethanol selectivity 10.5% at a conversion of 0.76%. During 9 h of time-on-stream, CO conversion decreased on CuCoLa2O3 while methanol and higher alcohol selectivity increased. The behaviors on CuCoZrO2 and CuCoAl2O3 were different. On these two catalysts, CO conversion and selectivity reached a near-steady state much more quickly than CuCoLa2O3. These results suggest changes on CuCoLa2O3 that increase the selectivity for oxygenates continue with time, at least over the time scale investigated here.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Atomic-Level Catalyst Design (CALCD); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Material Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- SC0001058
- OSTI ID:
- 1369703
- Alternate ID(s):
- OSTI ID: 1250112
- Journal Information:
- Applied Catalysis. A, General, Vol. 507, Issue C; Related Information: CALCD partners with Louisiana State University (lead); Clemson University; University of Florida; Georgia Institute of Technology; Grambling State University; Oak Ridge National Laboratory; Ohio State University; Pennsylvania State; Texas A&M University; Vienna University of Technology, Austria; University of Utrecht, Netherlands; ISSN 0926-860X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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