Fu Wenjing, Wei Cundi, Zuo Jing, Zhang Jiupeng, Zhang Jinyi, Xu Shaonan
Key Laboratory of Automobile Materials of Ministry of Education, Jilin Province Solid Waste Utilization Project Center, Department of Materials Science and Engineering, Jilin University, Changchun 130022, Jilin Prov., China.
ACS Omega. 2022 Jun 1;7(23):19775-19783. doi: 10.1021/acsomega.2c01543. eCollection 2022 Jun 14.
The Al sheets alloyed by Ga-In-Sn are generally utilized to react with water for H production, while the valuable byproducts, , alumina hydrates, have not been fully studied. In this work, through controlling the reaction temperature, three types of alumina hydrates, bayerite (40 °C), pseudo-boehmite (PB) (70-120 °C), and boehmite (130-160 °C), were successfully prepared based on a series of interface reactions and structural transformations. These alumina hydrates and their calcined products (alumina) possess high purity with a total impurity element content of <450 ppm, especially an extremely low sodium content (<21 ppm) and iron content (<52 ppm). Significantly, the obtained pseudo-boehmite displays excellent surface properties (specific surface area: 332.7 m g, pore volume: 0.3 cm g, and pore diameter: 3.6 nm), competitive to the current commercial SB powder by Sasol. This work not only deepens the understanding of the byproducts in a Ga-In-Sn-alloyed Al-water reaction but also establishes a facile "green" method oriented to industrial applications, which is promising for the linkage benefits of the hydrogen production industry.
由镓-铟-锡合金化的铝片通常用于与水反应制氢，而有价值的副产物——水合氧化铝，尚未得到充分研究。在这项工作中，通过控制反应温度，基于一系列界面反应和结构转变，成功制备了三种类型的水合氧化铝：三羟铝石（40℃）、拟薄水铝石（PB）（70-120℃）和薄水铝石（130-160℃）。这些水合氧化铝及其煅烧产物（氧化铝）具有高纯度，总杂质元素含量<450 ppm，特别是钠含量极低（<21 ppm）和铁含量极低（<52 ppm）。值得注意的是，所获得的拟薄水铝石表现出优异的表面性质（比表面积：332.7 m²/g，孔体积：0.3 cm³/g，孔径：3.6 nm），可与目前萨索尔公司的商用SB粉末相媲美。这项工作不仅加深了对镓-铟-锡合金化铝-水反应中副产物的理解，还建立了一种面向工业应用的简便“绿色”方法，这对于制氢产业的联动效益具有广阔前景。
