College of Safety and Emergency Management Engineering, Taiyuan University of Technology

电厂烟气主要成分为N2、CO2和部分O2，将电厂烟气注入矿井采空区可实现CO2封存，并替代注氮气防治遗煤自燃，但是烟气中的O2是造成遗煤自燃的因素之一。因此，亟待开发一种经济有效的催化剂来脱除电厂烟气中的O2。本研究采用共沉淀法，通过调变载体和负载量可控制备了铜基催化剂和系列xCuO/CeO2催化剂，利用BET、XRD、ICP、TEM、H2-TPR和XPS等手段对催化剂进行了表征，并建立催化剂结构与催化电厂烟气脱氧性能之间的构效关系。结果表明，CeO2的加入提高了CuO的分散性、增加了催化剂的氧空位，提高了催化剂的活性和还原氧化性能，Cu-Ce界面结构的协同效应促进了还原氧化过程，表现出良好的活性和循环稳定性。30CuO/CeO2由于其CuO颗粒尺寸最小、分散性最高、氧空位浓度最高，表现出较优的催化电厂烟气脱氧性能。本研究为开发低成本可循环使用、高活性和高稳定性的脱氧催化剂提供了参考。

The main components of power plant flue gas are N2, CO2 and part O2. Injecting power plant flue gas into mine goaf can achieve CO2 storage and replace nitrogen injection to prevent spontaneous combustion of left coal. However, O2 in flue gas is one of the factors causing spontaneous combustion of left coal. Therefore, it is urgent to develop an economical and effective catalyst to remove O2 from power plant flue gas. In this study, four types of copper-based catalysts were prepared using a controllable modulating support and loading capacity through co-precipitation method. Additionally, a series of CuO/CeO2 catalysts were prepared. The catalysts were characterized using BET, XRD, ICP, TEM, H2-TPR and XPS to establish a structure-activity relationship of catalyst. The results showed that the addition of CeO2 enhanced the dispersion of CuO, increased the oxygen vacancy in the catalyst, and improved the activity and reduction-oxidation performance of the catalyst. Moreover, the synergistic effect of Cu-Ce interface structure promoted the redox process, showing good activity and cycle stability. Among the catalysts, the 30CuO/CeO2 sample showed the best catalytic deoxidation performance owing to its smallest CuO particle size, highest dispersion and oxygen vacancy concentration. The results of this study provide a reference for the development of low cost, recyclable, high activity and stability deoxidation catalysts.

国家自然科学基金联合基金 ( U1810206 )资助

司马皓, 王雪峰, 邓存宝. 铜基载氧体催化电厂烟气脱氧研究[J]. 燃料化学学报（中英文）, 2024, 52(6): 839-849.

SIMA Hao, WANG Xuefeng, DENG Cunbao. Study on copper-based oxygen carrier catalytic power plant flue gas deoxidation[J]. Journal of Fuel Chemistry and Technology, 2024, 52(6): 839-849.