ORNL’s biomass particle and bulk property determination capability offers a thorough examination and understanding of biomass materials, essential for their efficient handling, conversion, and utilization. We offer a multifaceted approach to biomass characterization, providing valuable insights for optimizing biomass utilization across diverse applications. Using advanced techniques, we delve into the intricate physical characteristics at the particle level, encompassing size, shape, surface area, surface roughness, and densities, both true and envelope. These parameters are pivotal in various biomass conversion processes, including pyrolysis and combustion, ensuring optimal performance and efficiency. Drawing upon ORNL’s extensive expertise and equipment, we comprehensively assess biomass materials, encompassing their bulk properties such as density, compressibility, and permeability. Additionally, we analyze dynamic flow characteristics, including flow rate, specific flow energy, and flow stability, offering insights crucial for effective material handling and processing. Furthermore, our evaluation extends to shear characteristics, encompassing shear and wall friction, essential for understanding material behavior under various processing conditions. Our capability also includes the evaluation of segregation potential for biomass mixtures to ensure homogeneity and uniformity in composition, contributing to enhanced process reliability and product quality.