Study of electrostatic phenomenon in gas-solid processes

静电荷是在颗粒处理、运输和加工过程中，由于颗粒-颗粒、流体-颗粒和颗粒-壁面通过摩擦充电、摩擦通电和接触充电等接触而产生的。电荷的积聚会导致颗粒聚集、颗粒壁粘附和高压电场的产生，这可能导致爆炸，因此是一个主要的危害。聚合物工业中的气固流化床反应器、油气工业中的流体催化裂化装置以及制药中的压片和包封等气固过程为静电现象的发生提供了理想的环境。本研究计划将透过发展一种新的测量技术、研究主要的电荷产生机制和确定电荷产生控制策略，以帮助更好地了解上述行业的静电电荷产生。

Electrostatic charges are generated during particle handling, transport, and processing due to particle-particle, fluid-particle and particle-wall contacts by frictional charging, tribo-electrification and contact charging. The charge build-up results in particle agglomeration, particle-wall adhesion and generation of high-voltage electrical fields, which can cause explosions and therefore be a major hazard. Gas-solid processes such as gas-solid fluidized bed reactors in polymer industries, fluid catalytic crackers in oil and gas industries and tabletting and encapsulation in pharmaceuticals provide ideal environment for electrostatic phenomenon to occur. This research program will attempt to help to gain a better understanding of electrostatic charge generation in mentioned industries by developing a new measurement technique, studying the dominating charge generation mechanisms and determining charge generation control strategies.