UV-Laser ablation enhanced Joule-heating catalyst support for electrified MSR in microreactor

作者：Li, Xinying; Yuan, Ding; Xie, Tian; Zhang, Quancong; Xu, Wenjun; Fu, Ting; Chu, Xuyang; Luo, Tao; Wu, Linjing; Zhou, Wei^*

来源：Chemical Engineering Journal, 2023, 459: 141571.

DOI：10.1016/j.cej.2023.141571

• Joule-heating
• Catalyst support
• Microreactor
• Hydrogen production
• Methanol steam reforming
• Endothermic reaction

Methanol is a promising hydrogen carrier, where hydrogen-rich gas can be produced by methanol steam reforming (MSR). However, this method of releasing hydrogen is highly energy consuming. Herein, the Joule-heating catalyst support (JHCS) was fabricated by a FeCrAl metal to enhance the efficiency of electrification, replacing the conventional external heating method. The heat can be provided for the reforming reaction directly inside the microreactor by the Joule-heating method. The Joule-heating reactor showed a faster thermal response than the externally heated reactor; the start-up heating time and the time of a start-stop cycle are about 75 % and 50 % of those for external heating, respectively. The methanol conversion rate of the Joule-heating microreactor was 91.45 % at 280 degrees C, improved by nearly 30 % than the external heating counterpart. The consumed power density of the Joule-heating microreactor was 2 W/cm3, only 15.8 % of external heating (12.61 W/cm3). The reforming efficiency reached 51.91 % without any waste heat recovery measures, about 4 times of the external heating method. Heat transfer simulation verified the minimal radial temperature gradient in the microreactor eliminated by JHCS. The proposed JHCS method demonstrates a uniform microreactor temperature distribution and superior hydrogen production performance with lower power consumption.

• 单位
  厦门大学