Models for converting CLD to PSD for bimodal distributions of particles

Focused Beam Reflectance Measurement (FBRM) is a commonly used PAT tool that measures the Chord Length Distribution (CLD) of the particles in a suspension, providing a fingerprint of the size distribution of the suspended particles. Despite the extensive usage, there still exists a need for models for converting CLD to particle size distribution (PSD) particularly for bimodal distribution of particles with aspect ratio higher than one. In this work, we further developed and evaluated different models for converting the CLD to the PSD of particles with an aspect ratio greater than one and have discussed the applicability of the models to monomodal as well as bimodal distributions. The models have been verified at different aspect ratios using synthetically generated experimental data. It was observed that the geometric model proposed in this work performs better than the other models compared in this work. The presented models and results will be useful for selecting appropriate CLD to PSD models for a wide range of applications.