Abstract

This dissertation explores O₂/H₂O and H₂O₂/H₂O as alternative oxidizers to enhance combustion stability, reduce emissions, and improve hydrogen yield. Opposed-flow flame experiments show that oxy-steam reduces flame temperature and soot precursors while increasing thermal radiation. H₂O₂-steam, due to its exothermic decomposition, significantly improves flame stability and hydrogen production but introduces modeling challenges. In diesel reforming, H₂O₂ yields up to 80% more hydrogen and less coke compared to oxy-steam, highlighting its potential in confined or low-oxygen environments. These findings contribute to the development of cleaner combustion and reforming technologies for carbon-neutral energy systems.

Biography

Jiajun Li joined the Mechanical Engineering program in the PSE Division at KAUST in 2021. He received his bachelor's degree in Naval Architecture and Ocean Engineering from Harbin Engineering University and earned his master's degree in Mechanical Engineering from the University of Pittsburgh. His PhD research focuses on low-emission combustion and hydrogen production, particularly using O₂/H₂O and H₂O₂/H₂O mixtures in counterflow flames and diesel reforming.