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Role of Si/Al Ratio on Immobilization and Stability of Rhodium Complexes on ZSM-5
dc.contributor.advisor | Guzman, Javier | |
dc.contributor.author | Long, Brandon | |
dc.date.accessioned | 2009-03-23T03:11:43Z | |
dc.date.available | 2009-03-23T03:11:43Z | |
dc.date.issued | 2009-01-01 | |
dc.date.submitted | 2009 | |
dc.identifier.other | http://dissertations.umi.com/ku:10188 | |
dc.identifier.uri | http://hdl.handle.net/1808/4426 | |
dc.description.abstract | Rhodium complexes within the pores of zeolite ZSM-5 with varying Si/Al ratios (Si/Al 23, Si/Al 50, and Si/Al 280) were prepared from Rh1+(CO)2(C5H7O2), Rh22+(CO2CH3)4, and Rh3+(C5H7O2)3 followed by thermal treatment in He. IR results indicate that changing the Si/Al ratio stabilizes different Rh species, with the formation of Rh(I), Rh(II), or Rh(III) complexes along with the ability to coordinate two to four ligands. Through X-ray absorption spectroscopy, changes in oxidation state are followed and the final structure determined. Both the Si/Al ratio and rhodium precursor structure play a role, with Rh clusters of two atoms, four atoms, or six atoms immobilized on ZSM-5. Differences in bond lengths are affected by Si/Al ratio, creating tighter or more expanded clusters. This variation in structure caused by the Si/Al ratio shows potential for affecting the amount of hydrogen produced from the partial oxidation of methanol. | |
dc.format.extent | 72 pages | |
dc.language.iso | EN | |
dc.publisher | University of Kansas | |
dc.rights | This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author. | |
dc.subject | Chemical engineering | |
dc.title | Role of Si/Al Ratio on Immobilization and Stability of Rhodium Complexes on ZSM-5 | |
dc.type | Thesis | |
dc.contributor.cmtemember | Stagg-Williams, Susan | |
dc.contributor.cmtemember | Scurto, Aaron | |
dc.thesis.degreeDiscipline | Chemical & Petroleum Engineering | |
dc.thesis.degreeLevel | M.S. | |
kusw.oastatus | na | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess |
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Engineering Dissertations and Theses [1055]
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Theses [4088]