Lei Zhang, Lingbo Qi, Hao Shu, Yang Jia, Lei Zhang, Chao Yang, Fang Bai, Zhiyu Sun
Xi'an University of Science and Technology, Xi'an 710054, China.
Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an 710021, China.
ACS Omega. 2020 Dec 2;5(49):31567-31574. doi: 10.1021/acsomega.0c03642. eCollection 2020 Dec 15.
The development of high-efficiency and low-cost new catalysts is an extremely attractive topic. In this study, two different matrix bentonite-modified fly ash catalysts were successfully prepared, and the compressive strength of the catalyst was studied by using unsaturated dynamic and static triaxial technology. The axial compressive strength of FC (fly ash catalysts added with Ca-based bentonite) was greater than that of FN (fly ash catalysts added with Na-based bentonite). The catalyst reached 978 kPa. The prepared catalyst was characterized by X-ray diffraction analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, and specific surface area analysis (BET) of the catalyst. In addition, denitration performance of different catalysts was explored, and the reaction conditions were optimized. The results demonstrate that when the mixing ratio of fly ash and calcium-based bentonite in the FC is 4:1, the compressive strength is relatively high, and the denitration rate reaches about 82%.
开发高效低成本的新型催化剂是一个极具吸引力的课题。在本研究中，成功制备了两种不同基体膨润土改性的粉煤灰催化剂，并采用非饱和动静态三轴技术研究了催化剂的抗压强度。FC（添加钙基膨润土的粉煤灰催化剂）的轴向抗压强度大于FN（添加钠基膨润土的粉煤灰催化剂）。该催化剂达到了978 kPa。通过X射线衍射分析、傅里叶变换红外光谱、扫描电子显微镜以及催化剂的比表面积分析（BET）对制备的催化剂进行了表征。此外，还探索了不同催化剂的脱硝性能，并对反应条件进行了优化。结果表明，当FC中粉煤灰与钙基膨润土的混合比例为4:1时，抗压强度相对较高，脱硝率达到约82%。
