Development of Novel Evaluation Method for Deodorization Performance Based on Adsorption Isotherm and Material Balance

Abstract

This study proposes a novel evaluation method for deodorization performance based on adsorption isotherm and material balance. Traditional methods for deodorization performance relied on concentration reduction rates, making it difficult to predict deodorization performance when space volume or deodorant quantity changed. The proposed method determines the equilibrium concentration and equilibrium amount adsorbed by finding the intersection of a material balance equation and the deodorant's specific adsorption isotherm.

Key advantages of this approach include predicting performance at varying initial concentrations, calculating the necessary amount of deodorant to reach olfactometry threshold concentration, and scaling up results from small-scale bag tests to actual room sizes.

Validation experiments used by ammonia and an activated carbon filter as an odor and a deodorant, respectively demonstrated that the ammonia adsorption to activated carbon filter followed the Freundlich adsorption isotherm. The author successfully predicted the required sample weight to achieve an ammonia threshold concentration of 1.5 ppm, even when the gas volume was increased threefold. This methodology allows for the prediction of deodorization performance under various conditions.