Experimental study of humidity influence on triboelectric charging of particle-laden duct flows

Electrostatic charge on powders arises during pneumatic transport due to particle–particle and particle–surface interactions via triboelectrification. This is a potential threat the safety of industrial production source numerous fires dust explosions in past. Triboelectric charges are affected by environmental conditions, such as ambient temperature relative humidity. In this work, we experimentally investigated influence humidity particle gas–solid flows square-shaped duct. Monodisperse PMMA particles fed into fully developed airflow duct then pass through metallic section. The measured at outlet Faraday cup. By measuring electrostatic under various observed that first increases with decreases when becomes higher.