Green energy and fuel research., Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Review Advancing Hydrogen Development from 2015 to 2024 and Mitigating Noₓ Emissions Hydrogen-Enriched Combustion for a Cleaner Energy Future Yi-Kai Chih 1,*, Shang-Rong Kuo 2, Jing-Jie Wang 2 1 Department of Chemical Materials Engineering, National University Kaohsiung, Kaohsiung 811, Taiwan Greenergy, Tainan, Tainan 701, * Correspondence: [email protected] or [email protected] Received: 13 December 2024; Revised: 4 March 2025; Accepted: Published: 17 2025 Abstract: This study explores hydrogen energy’s transformative role in achieving net-zero greenhouse gas emissions, focusing on mitigating nitrogen oxides (NOx), byproduct hydrogen-enriched fuel combustion. Driven by rapid growth research 2024, it highlights hydrogen’s potential address critical energy environmental challenges. production is classified into thermolysis, biophotolysis, electrolysis, photoelectrochemical processes, with distinct sources outputs. Color codes denote types: green (electrolysis using renewables), blue (carbon capture natural reforming), gray (no carbon capture), pink (nuclear-powered), turquoise (methane decomposition). By 2050, hydrogen, aligned decarbonization goals declining costs, expected dominate the market, while will act as transitional source. The paper emphasizes importance pricing, regional cost disparities, strategic investments enhance low-emission competitiveness. However, major challenge increased NOx emissions higher combustion temperatures. reviews key mitigation strategies, including hydrogen-natural blending, staged combustion, exhaust recirculation (EGR), post-combustion measures such Selective Catalytic Reduction (SCR). Among these, EGR effectively lowers peak temperatures, optimizes fuel-air mixing minimize formation. Additionally, SCR remains one most efficient solutions, reducing over 80% various applications. demonstrates how these strategies can maximize minimizing impacts.

Language: Английский