The effect of zeolite framework during NH3-SCR reactions

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dc.contributor.authorHasani Jalilian, Raha
dc.contributor.departmentChalmers tekniska högskola / Institutionen för kemi och kemitekniksv
dc.contributor.examinerHärelind, Hanna
dc.contributor.supervisorHärelind, Hanna
dc.date.accessioned2021-06-18T11:13:13Z
dc.date.available2021-06-18T11:13:13Z
dc.date.issued2021sv
dc.date.submitted2020
dc.description.abstractZeolites are aluminosilicates with well-defined channels or pores containing metal cations. Zeolites are often used in automotive industries to reduce NOX emissions. This study aimed at synthesizing the zeolite SSZ-13 with different Si/Al ratio (SAR). Cu-SSZ-13 with SAR 12 and different Cu/Al molar ratio is the focus of this study. The purpose is to investigate the influence of framework structure on the formation of surface species during ammonia-SCR of NOX over Cu-based zeolites. The synthesis of the zeolites was carried out by the sol-gel method followed by hydrothermal crystallization in an autoclave, and Cuexchange was done by the incipient wetness impregnation method. To characterize the zeolites, ICP-SFMS, XRF, DRIFT, BET, BJH was used. XRD measurements showed no signs of impurities or structural changes since they matched the references. Synthesizing the zeolite with SAR 6 with different ratio of initial components was not successful. To evaluate the evolution of surface species during ammonia-SCR of NOX over Cu-based zeolites, DRIFT was used, which showed that Brønsted acid sites and Lewis acid sites could be found, which increased the catalytic activity and enhanced NOX conversion.sv
dc.identifier.coursecodeKBTX12sv
dc.identifier.urihttps://hdl.handle.net/20.500.12380/302624
dc.language.isoengsv
dc.setspec.uppsokPhysicsChemistryMaths
dc.titleThe effect of zeolite framework during NH3-SCR reactionssv
dc.type.degreeExamensarbete för masterexamensv
dc.type.uppsokH
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