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Title: Ethanol Conversion to C4+ Olefins over Bimetallic Copper- And Lanthanum-Containing Beta Zeolite Catalysts

Journal Article · · ACS Sustainable Chemistry & Engineering
 [1];  [2];  [3];  [3];  [1]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); University of Maryland, College Park, MD (United States)
  3. University of Alabama, Tuscaloosa, AL (United States)
  4. 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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