Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2022-10-04 , DOI: 10.1016/j.ultsonch.2022.106189 Wei-Zhuo Gai 1 , Shuang Tian 2 , Ming-Hao Liu 1 , Xianghui Zhang 1 , Zhen-Yan Deng 3
Ultrasound can accelerate and change the reaction process and is widely used in the field of hydrogen production and storage. In this study, ultrasound (US) and AlOOH suspension (AH) are used to promote hydrogen production from Al hydrolysis. The results indicate that both US and AH greatly shorten the induction time and enhance the hydrogen production rate and yield. The promoting effect of US and AH on Al hydrolysis originates from the acoustic cavitation effect and catalytic effect, respectively. When AH is used in combination with US, Al hydrolysis has the best hydrogen production performance and the hydrogen yield can reach 96.6 % within 1.2 h, because there is a synergistic effect on Al hydrolysis between AH and US. Mechanism analyses reveal that the micro-jets and local high temperature environment arising from acoustic cavitation improve the catalytic activity of AlOOH, while the suspended AlOOH particles enhance the cavitation effect of US. This work provides a novel and feasible method to promote hydrogen production from Al hydrolysis.
中文翻译:
超声与AlOOH悬浮液对Al水解制氢的协同作用及机制
超声波可以加速和改变反应过程,广泛应用于制氢和储氢领域。在这项研究中,超声波 (US) 和 AlOOH 悬浮液 (AH) 用于促进铝水解产生氢气。结果表明,US和AH都大大缩短了诱导时间,提高了产氢率和产率。US和AH对Al水解的促进作用分别来源于声空化效应和催化作用。当AH与US联合使用时,Al水解产氢性能最好,1.2 h内产氢率可达96.6%,这是因为AH和US对Al水解有协同作用。机理分析表明,声空化产生的微射流和局部高温环境提高了AlOOH的催化活性,而悬浮的AlOOH颗粒增强了US的空化效应。该工作为促进铝水解制氢提供了一种新颖可行的方法。