Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/134455
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dc.titleDEVELOPMENT OF NICKEL-BASED CATALYSTS FOR HIGH-TEMPERATURE WATER-GAS SHIFT REACTION
dc.contributor.authorANG MING LI
dc.date.accessioned2016-12-31T18:01:57Z
dc.date.available2016-12-31T18:01:57Z
dc.date.issued2015-09-18
dc.identifier.citationANG MING LI (2015-09-18). DEVELOPMENT OF NICKEL-BASED CATALYSTS FOR HIGH-TEMPERATURE WATER-GAS SHIFT REACTION. ScholarBank@NUS Repository.
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/134455
dc.description.abstractWATER-GAS SHIFT (WGS) REACTION PLAYS A DOMINANT ROLE IN PROMOTING THE IDEAL OF HYDROGEN ECONOMY BY UPGRADING HYDROGEN CONTENT OF SYNGAS. DESPITE ITS HIGH ACTIVITY AND LOW COST, USE OF NICKEL-BASED CATALYSTS IN WGS HAS BEEN PROHIBITIVE DUE TO ITS TENDENCY TOWARDS METHANATION WHICH REDUCES HYDROGEN YIELD. IN THIS WORK, SEVERAL STRATEGIES HAVE BEEN APPLIED TO SUPPRESS METHANATION. THROUGH TECHNIQUES SUCH AS XAS, IN-SITU DRIFTS, XPS, H2/CO-TPR AND XRD, CAUSES OF WGS ACTIVITY AND SELECTIVITY ENHANCEMENT WERE ELUCIDATED. FIRSTLY, FORMATION OF SMALL NI-CU ALLOY THROUGH PROMOTION WITH OLEIC ACID ENHANCED CO ADSORPTION WHICH ACTIVATED HYDROXYLS FOR ENHANCED WGS ACTIVITY. NEXT, ADDITION OF ALKALI METALS (E.G. NA AND K) INCREASED HYDROXYLS CONCENTRATION WHILE STRENGTHENING CO ADSORPTION, THEREBY PREVENTING FORMATION OF SUBCARBONYLS WHICH ARE PRECURSORS FOR METHANATION. LASTLY, NOVEL CUBIC-CEO2@NI-PHYLLOSILICATE@CEO2 CORE-SHELL STRUCTURES WITH INCREASED NICKEL-CERIA INTERFACIAL AREA AND STRONG MET
dc.language.isoen
dc.subjectnickel, copper, ceria, catalyst, water-gas shift, hydrogen
dc.typeThesis
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.contributor.supervisorKAWI, SIBUDJING
dc.description.degreePh.D
dc.description.degreeconferredDOCTOR OF PHILOSOPHY
dc.identifier.isiutNOT_IN_WOS
Appears in Collections:Ph.D Theses (Open)

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