National University of Singapore
DEVELOPMENT OF NOVEL CATALYSTS AND PROCESSES FOR SUSTAINABLE HYDROGEN TECHNOLOGIES
Abstract
dc:description.abstractThis Ph.D. study advances hydrogen-related technologies to support decarbonization, focusing on key reactions like propane dehydrogenation (PDH), CO₂ methanation, dry reforming of methane (DRM), and COₓ-free catalytic methane decomposition (CDM). A core challenge in these processes is catalyst sintering, which reduces stability and performance. The research develops anti-sintering strategies using single-atom alloys (PtCu, PtZn), intermetallics, and confinement effects. Notably, PtCu/1B shows 99% propylene selectivity for 100 hours at 500 °C, while Pt₁Zn₁ exhibits thermodynamic-limit efficiency at 550 °C. Plasma-treated Ni-Ce catalysts improve CO₂ methanation, and a CeO₂-based core@shell catalyst mitigates coking during DRM. For CDM, Ni-phyllosilicate catalysts on KCC-1 support carbon nanotube formation and regeneration. These innovations improve catalyst durability and efficiency. Additionally, integrating membrane reactors is proposed to enhance hydrogen recovery. Thermodynamic assessments were conducted across PDH, DRM, CDM, ammonia decomposition, and methylcyclohexane dehydrogenation to guide the development of commercially viable and sustainable hydrogen technologies.
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
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- LIM KANG HUI