Particle technology is one of the fundamental bases for the development of energy and environment related technologies. Many energy conversion processes and environmental control systems involve the use or the production of particulate phases. A sustainable design of such technologies involves a better design of particles (e.g., catalysts, CO2 capture sorbents, chemical looping oxygen carriers) and understanding of reactions involving novel particulate systems. This area is designed to provide a platform for researchers and practitioners to discuss advancement and exchange ideas on how to address common challenges in applying particulate technologies in the sustainable energy and environment fields, such as energy conversion fundamentals and technologies, unconventional and renewable energy sources, carbon capture, utilization, and sequestration.