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oai:dspace.mit.edu:1721.1/1519872023-09-01T03:29:33Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023

Plata, Desiree Wilkinson, Mollie Massachusetts Institute of Technology. Department of Civil and Environmental Engineering 2023-08-30T15:56:56Z 2023-08-30T15:56:56Z 2023-06 2023-08-09T20:46:51.652Z https://hdl.handle.net/1721.1/151987 Methane is the second-most emitted greenhouse gas after carbon dioxide, and it is significantly more powerful as a short-term warmer, making it a valuable target for climate change mitigation efforts. Zeolites are earth-abundant minerals common in catalysis for their low price combined with high conversion and throughput potential. This study evaluates a specific copper-zeolite (mordenite) methane oxidation catalyst for long-term durability and potential performance at 400 and 950 C. Using materials characterization and spectroscopy techniques including scanning-electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller analysis (BET), differential scanning calorimetry (DSC), and X-ray diffraction (XRD), chemical and structural changes are tracked, identified, and assessed over the course of three months. Samples treated at 400 °C show no major structural or chemical changes in the catalyst, while samples treated at 950 °C show gradual transformation into a nonporous quartz-mullite-cristobalite mixture. This suggests indefinite catalyst stability at the former temperature and progressive catalyst degradation at the latter temperature, providing plausible long-term operation conditions and peak temporary conditions for this method of methane abatement. M.Eng. Massachusetts Institute of Technology In Copyright - Educational Use Permitted Copyright retained by author(s) https://rightsstatements.org/page/InC-EDU/1.0/ Materials Characterization and Spectroscopy for a Methane Abatement Catalyst Thesis application/pdf Master Master of Engineering in Civil and Environmental Engineering Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="87503688-0add-4925-82d1-66b56e41e3ea"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Title>Materials Characterization and Spectroscopy for a Methane Abatement Catalyst</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2023-06</PublicationDate> <Authors> <Author> <DisplayName>Wilkinson, Mollie</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>https://rightsstatements.org/page/InC-EDU/1.0/</License> <Abstract>Methane is the second-most emitted greenhouse gas after carbon dioxide, and it is significantly more powerful as a short-term warmer, making it a valuable target for climate change mitigation efforts. Zeolites are earth-abundant minerals common in catalysis for their low price combined with high conversion and throughput potential. This study evaluates a specific copper-zeolite (mordenite) methane oxidation catalyst for long-term durability and potential performance at 400 and 950 C. Using materials characterization and spectroscopy techniques including scanning-electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller analysis (BET), differential scanning calorimetry (DSC), and X-ray diffraction (XRD), chemical and structural changes are tracked, identified, and assessed over the course of three months. Samples treated at 400 °C show no major structural or chemical changes in the catalyst, while samples treated at 950 °C show gradual transformation into a nonporous quartz-mullite-cristobalite mixture. This suggests indefinite catalyst stability at the former temperature and progressive catalyst degradation at the latter temperature, providing plausible long-term operation conditions and peak temporary conditions for this method of methane abatement.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>