Synthesis of Ru confined in MFI zeolites catalyst and its study on the catalytic combustion performance of propane
WANG Jing-jing1, XIA Liang-hui1, WU Ya-ni1, LIU Yu-jie1, XU He1, LIU Qi-yuan1, LIU Ji-chen1, JIAN Yan-fei1, HE Chi1,2
1. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2. National Engineering Laboratory for VOCs Pollution Control Material & Technology, Beijing 101408, China
Abstract：Three Ru-based catalysts were synthesized using in-situ synthesis, impregnation, and deposition-precipitation methods in combination with MFI zeolites to investigate their catalytic oxidation activity toward propane (C3H8). The catalyst synthesized via the in-situ method, denoted as Ru@MFI, exhibited the highest low-temperature oxidation activity, achieving a 90% conversion rate at 270°C, along with remarkable thermal stability at high temperatures and hydrophobicity. Characterization techniques, including X-ray diffraction (XRD), N2 adsorption-desorption, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and temperature-programmed desorption of CO (CO-TPD), revealed that Ru confined within the MFI zeolite channels possessed the smallest particle size and highest dispersion, thereby increasing the number of active Ru sites. Further characterization using Raman spectroscopy and hydrogen temperature-programmed reduction (H2-TPR) indicated that interactions between Ru and the MFI framework led to a redistribution of charge around Ru or oxygen, enhancing the reduction capabilities. Consequently, the Ru@MFI catalyst demonstrated superior propane oxidation activity. Additionally, the geometric confinement within the MFI channels maintained the stability and dispersion of Ru species during high-temperature calcination, effectively preventing Ru aggregation and further ensuring the catalyst's high-temperature thermal stability.
王晶晶, 夏良辉, 武雅妮, 刘昱洁, 徐赫, 刘起源, 刘基丞, 建艳飞, 何炽. MFI分子筛限域Ru催化剂的制备及其丙烷催化燃烧性能[J]. 中国环境科学, 2025, 45(1): 58-65.
WANG Jing-jing, XIA Liang-hui, WU Ya-ni, LIU Yu-jie, XU He, LIU Qi-yuan, LIU Ji-chen, JIAN Yan-fei, HE Chi. Synthesis of Ru confined in MFI zeolites catalyst and its study on the catalytic combustion performance of propane. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 58-65.
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