Li Xinying, Gao Chao, Yuan Ding, Qin Yuanbao, Fu Dongbi, Jiang Xiyang, Zhou Wei
Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China.
Materials (Basel). 2024 May 24;17(11):2535. doi: 10.3390/ma17112535.
Hydrogen energy is the clean energy with the most potential in the 21st century. The microchannel reactor for methanol steam reforming (MSR) is one of the effective ways to obtain hydrogen. Ceramic materials have the advantages of high temperature resistance, corrosion resistance, and high mechanical strength, and are ideal materials for preparing the catalyst support in microchannel reactors. However, the structure of ceramic materials is hard and brittle, and the feature size of microchannel is generally not more than 1 mm, which is difficult to process using traditional processing methods. Diamond wire saw processing technology is mainly used in the slicing of hard and brittle materials such as sapphire and silicon. In this paper, a microchannel with a periodic corrugated microstructure was fabricated on a ceramic plate using diamond wire sawing, and then as a catalyst support when used in a microreactor for MSR hydrogen production. The effects of wire speed and feed speed on the amplitude and period size of the periodic corrugated microstructure were studied using a single-factor experiment. The microchannel surface morphology was observed via SEM and a 3D confocal laser microscope under different processing parameters. The microchannel samples obtained under different processing parameters were supported by a multiple impregnation method. The loading strength of the catalyst was tested via a strong wind purge experiment. The experimental results show that the periodic corrugated microstructure can significantly enhance the load strength of the catalyst. The microchannel catalyst support with the periodic corrugated microstructure was put into the microreactor for a hydrogen production experiment, and a good hydrogen production effect was obtained. The experimental results have a positive guiding effect on promoting ceramic materials as the microchannel catalyst support for the development of hydrogen energy.
氢能是21世纪最具潜力的清洁能源。甲醇蒸汽重整（MSR）微通道反应器是获取氢气的有效途径之一。陶瓷材料具有耐高温、耐腐蚀和高机械强度等优点，是制备微通道反应器中催化剂载体的理想材料。然而，陶瓷材料结构硬且脆，微通道特征尺寸一般不超过1毫米，采用传统加工方法难以加工。金刚石线锯加工技术主要用于蓝宝石、硅等硬脆材料的切片。本文利用金刚石线锯在陶瓷板上制备了具有周期性波纹微观结构的微通道，然后将其用作MSR制氢微反应器中的催化剂载体。采用单因素实验研究了线速度和进给速度对周期性波纹微观结构的振幅和周期尺寸的影响。在不同加工参数下，通过扫描电子显微镜（SEM）和三维共聚焦激光显微镜观察微通道表面形貌。采用多次浸渍法对不同加工参数下得到的微通道样品进行负载。通过强风吹扫实验测试催化剂的负载强度。实验结果表明，周期性波纹微观结构可显著提高催化剂的负载强度。将具有周期性波纹微观结构的微通道催化剂载体放入微反应器中进行制氢实验，取得了良好的制氢效果。实验结果对推动陶瓷材料作为微通道催化剂载体发展氢能具有积极的指导作用。
