Abstract
The paraffin-to-olefin (P/O) ratio in gasoline fuel is a critical metric affecting fuel properties and engine efficiency. In the conversion of dimethyl ether (DME) to high-octane hydrocarbons over BEA zeolite catalysts, the P/O ratio can be controlled through catalyst design. Here, we report bimetallic catalysts that balance the net hydrogenation and dehydrogenation activity during DME homologation. The Cu-Zn/BEA catalyst exhibited greater relative dehydrogenation activity attributed to higher ionic site density, resulting in a lower P/O ratio (6.6) versus the benchmark Cu/BEA (9.4). The Cu-Ni/BEA catalyst exhibited increased hydrogenation due to reduced Ni species, resulting in a higher P/O ratio (19). The product fuel properties were estimated with an efficiency merit function and compared against finished gasolines and a typical alkylate blendstock. Merit values for the hydrocarbon product from all three BEA catalysts exceeded those of the comparison fuels (0–5.3), with the product from Cu-Zn/BEA exhibiting the highest merit value (9.7).
| Original language | English |
|---|---|
| Article number | 120801 |
| Journal | Applied Catalysis B: Environmental |
| Volume | 301 |
| DOIs | |
| State | Published - Feb 2022 |
Funding
This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, in part by Argonne National Laboratory, operated by The University of Chicago, and in part by Oak Ridge National Laboratory, operated by UT-Battelle, LLC, for the U.S. Department of Energy ( DOE ) under Contract Nos. DE-AC36-08GO28308 , DE-AC02-06CH11357 , and DE-AC05-00OR22725 , respectively. Funding provided by the U.S. DOE Office of Energy Efficiency and Renewable Energy Bioenergy Technologies Office in collaboration with the Chemical Catalysis for Bioenergy (ChemCatBio) Consortium, a member of the Energy Materials Network (EMN). ECW and JTM were supported in part by the National Science Foundation under Cooperative Agreement No. EEC–1647722. This research used resources of the Advanced Photon Source, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and the MRCAT member institutions. The microscopy was performed as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility. The views expressed in this article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for U.S. Government purposes. This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, in part by Argonne National Laboratory, operated by The University of Chicago, and in part by Oak Ridge National Laboratory, operated by UT-Battelle, LLC, for the U.S. Department of Energy (DOE) under Contract Nos. DE-AC36-08GO28308, DE-AC02-06CH11357, and DE-AC05-00OR22725, respectively. Funding provided by the U.S. DOE Office of Energy Efficiency and Renewable Energy Bioenergy Technologies Office in collaboration with the Chemical Catalysis for Bioenergy (ChemCatBio) Consortium, a member of the Energy Materials Network (EMN). ECW and JTM were supported in part by the National Science Foundation under Cooperative Agreement No. EEC–1647722. This research used resources of the Advanced Photon Source, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and the MRCAT member institutions. The microscopy was performed as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility. The views expressed in this article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for U.S. Government purposes.
| Funders | Funder number |
|---|---|
| Chemical Catalysis for Bioenergy | |
| Energy Materials Network | |
| U.S. DOE Office of Energy Efficiency and Renewable Energy Bioenergy Technologies Office | |
| U.S. Government | |
| National Science Foundation | EEC–1647722 |
| U.S. Department of Energy | DE-AC05-00OR22725, DE-AC02-06CH11357, DE-AC36-08GO28308 |
| Office of Science | |
| Argonne National Laboratory | |
| Oak Ridge National Laboratory | |
| National Renewable Energy Laboratory | |
| University of Chicago |
Keywords
- Cu/BEA zeolite
- Dehydrogenation
- Engine efficiency
- High octane gasoline
- Paraffin/olefin ratio