| Description |
1 online resource (13 pages) : color illustrations. |
|
text txt rdacontent |
|
computer c rdamedia |
|
online resource cr rdacarrier |
| Series |
NREL/PR ; 5100-79702 |
|
NREL/PR ; 5100-79702.
|
| Note |
"ACS Spring 2021 National Meeting, April 7th 2021." |
|
"ChemCatBio Chemical Catalysis for Bioenergy." |
| Bibliography |
Includes bibliographical references (page 12). |
| Funding |
National Renewable Energy Laboratory DE-AC36-08GO28308 |
| Note |
Description based on online resource; title from PDF title page (NREL, viewed on Aug. 18, 2021). |
| Summary |
Conversion of methanol and dimethyl ether to high-octane gasoline catalyzed by beta zeolite (BEA) provides an opportunity for the production of high-quality fuels from renewable carbon sources (e.g., gasified biomass). Recent research demonstrated that a Cu-modified BEA zeolite catalyst (Cu/BEA) offered advantages over the unmodified BEA catalyst due to multifunctional Cu species that enabled incorporation of co-fed H2, reactivation of light alkanes, and reduction of products from the aromatic hydrocarbon pool. The shift in hydrocarbon pool chemistry has the potential to influence the identity and relative composition of surface carbon species that are often linked to deactivation. A detailed understanding of these carbon species is important to develop an effective and efficient regeneration procedure that can enable the transition from fundamental catalyst development to commercial application. Here, we applied complementary ex situ and in situ characterization techniques to compare the structures of surface carbon species on post-reaction Cu/BEA and unmodified BEA catalysts. Both catalysts contained acyclic and aromatic hydrocarbons along with graphitic carbon species. However, the post-reaction Cu/BEA catalyst had a lower polycyclic aromatic content, and further, the graphitic species were more hydrogenated and defective. It was also found that the presence of Cu promoted carbon removal at lower temperatures than for unmodified BEA through activation of O2 by Cu during thermal oxidation. The fundamental insight into the composition of surface carbon species enabled the design of an effective and efficient regeneration strategy for the DME homologation reaction over Cu/BEA, resulting in full recovery of the catalyst activity. |
| Subject |
Hydrocarbons -- United States.
|
|
Synthesis gas.
|
|
Speciation (Chemistry) -- United States.
|
|
Speciation (Chemistry)
|
|
Hydrocarbures -- États-Unis.
|
|
Gaz de synthèse.
|
|
Spéciation (Chimie)
|
|
Hydrocarbons
|
|
Speciation (Chemistry)
|
|
Synthesis gas
|
|
United States https://id.oclc.org/worldcat/entity/E39PBJtxgQXMWqmjMjjwXRHgrq
|
| Indexed Term |
catalyst regeneration |
|
coke formation |
|
Cu/BEA catalyst |
|
dimethyl ether |
|
high octane gasoline |
|
in situ spectroscopy |
| Genre/Form |
technical reports.
|
|
Technical reports
|
|
Technical reports.
|
|
Rapports techniques.
|
| Added Author |
National Renewable Energy Laboratory (U.S.), issuing body.
|
|
United States. Department of Energy. Office of Energy Efficiency and Renewable Energy, sponsoring body.
|
| Standard No. |
1784275 OSTI ID |
|
0000-0002-8751-2003 |
| Gpo Item No. |
0430-P-09 (online) |
| Sudoc No. |
E 9.22:NREL/PR-5100-79702 |
|
