Experimental investigation on the moisture absorption performance of common rough processed biomass particles

Abstract With the increasingly severe global ecological and energy crisis, green environmental protection is receiving more and more attention from people. This study uses peanut shells and bamboo as raw materials for rough processing to produce biomass particles as solid adsorbents, exploring the feasibility of using biomass materials as environmentally friendly desiccants. The pore size and distribution of the materials are characterized by a fully automatic specific surface area and pore size analyzer, and the desorption performance of the materials is detected by a thermogravimetric analyzer. Using a dynamic water vapor adsorption analyzer (DVS) to test the moisture absorption capacity and rate of materials under a single operating condition (25 ℃, RH90%), and comparing them with silica gel under the same experimental conditions. The results show that the specific surface area and pore volume of bamboo charcoal particles are larger than those of peanut shell particles, so the moisture absorption of bamboo charcoal particles is better than that of peanut shell particles; Thermogravimetric analysis shows that compared to bamboo charcoal particles, peanut shell particles have lower temperatures during the main desorption stage and consume less energy during the regeneration process; Research on adsorption kinetics shows that both bamboo charcoal and peanut shell particles have lower moisture absorption than silica gel, but have a longer effective dehumidification time. Therefore, bamboo charcoal and peanut shell particles are potential environmentally-friendly dehumidification materials.