Investigation into the hydrogen inhibition mechanism of Platycladus orientalis leaf extract as a biodegradation inhibitor for waste aluminum-silicon alloy dust in wet dust collectors
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引用次数: 0
Abstract
This study investigates the risk of hydrogen explosion caused by waste metal dust encountering water in wet dust collectors. It proposes using renewable plant extracts to suppress hydrogen evolution from aluminum-silicon (Al-Si) alloy dust, aiming to achieve intrinsically safer production. Platycladus orientalis leaf extract (POLE) was prepared using water as a solvent. Hydrogen inhibition experiments, material characterization, and theoretical calculations were conducted to evaluate the effect of POLE on waste Al-Si dust. The inhibition experiments demonstrated that POLE exhibits excellent inhibitory performance. At a POLE concentration of 2.0 g/L, the hydrogen inhibition efficiency reaches 97.71 % after 22 h, with a reaction rate constant of 8.9708 × 10−5, approaching zero. This efficiency remained stable over 5 days. POLE formed a uniform, dense protective film on the Al-Si dust surface, with a contact angle of 99.23°. FTIR spectra revealed absorption peaks corresponding to POLE functional groups and Al-O bonds, indicating that successfully adsorption of POLE through both physical and chemical interactions. Finally, theoretical calculations were performed to further explain the hydrogen inhibition mechanism of POLE, supplementing and confirming the characterization data. This study inhibited hydrogen production from waste dust, offering a new approach to enhancing the hydrogen production rate from recycled Al scraps.
本研究调查了废金属粉尘在湿式集尘器中遇水引起氢爆炸的风险。研究建议使用可再生植物提取物来抑制铝硅(Al-Si)合金粉尘中的氢演化,从而实现本质上更安全的生产。以水为溶剂制备了东方桔梗叶提取物(POLE)。通过氢抑制实验、材料表征和理论计算,评估了 POLE 对铝硅废尘的影响。抑制实验表明,POLE 具有优异的抑制性能。当 POLE 浓度为 2.0 g/L 时,22 h 后氢气抑制效率达到 97.71%,反应速率常数为 8.9708 × 10-5,接近零。这一效率在 5 天内保持稳定。POLE 在铝硅粉尘表面形成了一层均匀致密的保护膜,接触角为 99.23°。傅立叶变换红外光谱显示了与 POLE 官能团和 Al-O 键相对应的吸收峰,表明 POLE 通过物理和化学作用成功吸附。最后,理论计算进一步解释了 POLE 的抑氢机理,补充并证实了表征数据。该研究抑制了废粉尘的制氢,为提高回收铝废料的制氢率提供了一种新方法。
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