title: Heterobimetallic Zeolite, InV-ZSM-5, Enables Efficient Conversion of Biomass Derived Ethanol to Renewable Hydrocarbons.
abstract: Direct catalytic conversion of ethanol to hydrocarbon blend-stock can increase biofuels use in current vehicles beyond the ethanol blend-wall of 10-15%. Literature reports describe quantitative conversion of ethanol over zeolite catalysts but high C2 hydrocarbon formation renders this approach unsuitable for commercialization. Furthermore, the prior mechanistic studies suggested that ethanol conversion involves endothermic dehydration step. Here, we report the complete conversion of ethanol to hydrocarbons over InV-ZSM-5 without added hydrogen and which produces lower C2 (<13%) as compared to that over H-ZSM-5. Experiments with C2H5OD and in situ DRIFT suggest that most of the products come from the hydrocarbon pool type mechanism and dehydration step is not necessary. Thus, our method of direct conversion of ethanol offers a pathway to produce suitable hydrocarbon blend-stock that may be blended at a refinery to produce fuels such as gasoline, diesel, JP-8, and jet fuel, or produce commodity chemicals such as BTX.
authors.affiliation: Materials Science &Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA, 37831-6133.
authors.forename: Chaitanya K
authors.initials: CK
authors.lastname: Narula
authors.affiliation: Materials Science &Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA, 37831-6133.
authors.forename: Zhenglong
authors.initials: Z
authors.lastname: Li
authors.affiliation: Materials Science &Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA, 37831-6133.
authors.forename: Erik M
authors.initials: EM
authors.lastname: Casbeer
authors.affiliation: Materials Science &Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA, 37831-6133.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Geiger
authors.affiliation: Energy &Environmental Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
authors.forename: Melanie
authors.initials: M
authors.lastname: Moses-Debusk
authors.affiliation: Energy &Environmental Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
authors.forename: Martin
authors.initials: M
authors.lastname: Keller
authors.affiliation: Physical Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
authors.forename: Michelle V
authors.initials: MV
authors.lastname: Buchanan
authors.affiliation: Energy &Environmental Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
authors.forename: Brian H
authors.initials: BH
authors.lastname: Davison