Ethanol Conversion to C4+ Olefins over Bimetallic Copper- And Lanthanum-Containing Beta Zeolite Catalysts
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); University of Maryland, College Park, MD (United States)
- University of Alabama, Tuscaloosa, AL (United States)
- University of Maryland, College Park, MD (United States)
We report ethanol conversion to C4+ olefins remains a critical yet nonselective process for producing renewable middle distillates. Here, Cu–La/Beta catalysts composed of copper and lanthanum incorporated onto a dealuminated Beta support are reported for ethanol conversion to C4+ olefins (73% selectivity, ~98% ethanol conversion, 623 K,<4% C1–C3 hydrocarbons) which particularly favors C5+ olefin formation (43% selectivity) as a distinction from the benchmarking Cu–Y/Beta catalyst. Monometallic Cu/Beta or La/Beta samples are insufficient to catalyze the C4+ olefin formation and primarily form dehydration products (e.g., ethylene and diethyl ether), indicating the necessity of both Cu and La species for butene and C5+ olefin formation. Increasing the bulk La loading at a fixed Cu content yields higher C5+ olefins until the La/Cu molar ratio reaches 3.6. These findings indicate Cu–La/Beta as an effective ethanol conversion catalyst that facilitates multiple C–C bond formation events required for synthesizing C5+ olefins (i.e., hexenes and octenes).
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1883667
- Journal Information:
- ACS Sustainable Chemistry & Engineering, Vol. 10, Issue 18; ISSN 2168-0485
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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