Hydrogen evolution risk and sustainable control strategy for industrial aluminum alloy dust in wet dust collectors

Abstract

The management of aluminium-silicon alloy polishing dust in wet dust collection systems is crucial for addressing hydrogen evolution risks that lead to potential explosion hazards and impact the efficiency of hydrogen recovery during dust recycling. This study assesses the explosion risks associated with hydrogen evolution from aluminum-silicon dust during hydrolysis and investigates the efficacy of expired vitamin C Yinqiao tablets (EVCTs) as sustainable hydrogen inhibitors. Experimental results show that elevated temperatures and negative pressure intensify hydrogen generation, creating substantial safety risks during storage and operations. At a concentration of 500 mg/L, EVCTs achieve a hydrogen inhibition efficiency of 94.43 %, effectively stabilizing hydrogen evolution suppression even under varying environmental conditions. Molecular simulations indicate that the active components of EVCTs interact with the aluminium-silicon surface via heterocyclic π-electrons and heteroatoms (O and N atoms), forming a stable adsorption layer. This layer not only inhibits hydrogen evolution but also preserves the structural integrity of the dust particles, facilitating safer handling and storage. By demonstrating the dual benefits of explosion risk mitigation and waste pharmaceutical recycling, this study provides an innovative approach to enhancing the safety of industrial waste dust management and the resource efficiency of its recycling.