Petroleum Science >2019,??Issue 4:??912-919 DOI: https://doi.org/10.1007/s12182-019-0335-5
Highly active OMS-2 for catalytic ozone decomposition under humid conditions Open?Access
文章信息
作者：Bo Peng, Wenjing Bao, Linlin Wei, Runduo Zhang, Zhoujun Wang, Zhichun Wang, Ying Wei
作者單位：
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, People’s Republic of China
投稿時間：218-09-10
引用方式：Peng, B., Bao, W., Wei, L. et al. Pet. Sci. (2019) 16: 912. https://doi.org/10.1007/s12182-019-0335-5
文章摘要
Four kinds of cryptomelane-type octahedral molecular sieve (OMS)-2-X (the X represents the molar ratio of KMnO4/MnAc2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reaction of KMnO4 and MnAc2, by changing their molar ratios. These samples were characterized by N2 adsorption–desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), temperature programmed reduction by H2 (H2-TPR) and X-ray photoelectron spectroscopy (XPS). Among them, the OMS-2-0.7 sample showed the best O3 conversion of 92% under high relative humidity (RH) of 90% and gas hourly space velocity of 585,000 h?1. This was accordingly thought as a possible way for purifying ozone-containing waste gases under high RH atmospheres. The efficiency of ozone decomposition of the prepared OMS-2-X sample was found to be related to specific surface area, particle size, surface oxygen vacancies, and Mn3+ cation amounts. The one-step hydrothermal synthesis was shown to be a simple method to prepare the considerably active OMS-2 solids for ozone decomposition.
關鍵詞
-
Cryptomelane type, Manganese oxide, Ozone decomposition, Nanofiber, Oxygen vacancy