Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
Int J Environ Res Public Health. 2023 Mar 10;20(6):4902. doi: 10.3390/ijerph20064902.
NO is a greenhouse gas and a candidate oxidant. Volatile organic pollutants (VOCs) have caused great harm to the atmospheric ecological environment. Developing the technique utilizing NO as the oxidant to oxidize VOCs to realize the collaborative purification has significant importance and practical value for NO emission control and VOC abatement. Therefore, the study of NO catalytic oxidation of tert-butanol based on zeolite catalysts was carried out. A series of molecular sieves, including FER, MOR, ZSM-5, Y, and BEA, were selected as the catalyst objects, and the 1.5% wt Fe and Co were, respectively, loaded on the zeolite catalysts via the impregnation method. It was found that the catalytic performance of BEA was the best among the molecular sieves. Comparing the catalytic performance of Fe-BEA under different load gradients (0.25~2%), it was found that 1.5% Fe-BEA possessed the best catalytic activity. A series of characterization methods showed that Fe content in 1.5% Fe-BEA was the highest, and more active sites formed to promote the catalytic reaction. The α-O in the reaction eventually oxidized tert-butanol to CO over the active site. The Co mainly existed in the form of Co cations over Co-BEA samples; the 2% Co-BEA possessing higher amounts of Co exhibited the highest activity among the prepared Co-BEA samples.
NO 是一种温室气体和候选氧化剂。挥发性有机污染物（VOCs）对大气生态环境造成了巨大危害。开发利用 NO 作为氧化剂氧化 VOCs 以实现协同净化的技术，对于控制 NO 排放和减少 VOCs 具有重要意义和实用价值。因此，开展了基于沸石催化剂的 NO 催化氧化叔丁醇的研究。选择 FER、MOR、ZSM-5、Y 和 BEA 等一系列分子筛作为催化剂对象，通过浸渍法分别在分子筛催化剂上负载 1.5wt%的 Fe 和 Co。结果表明，BEA 在分子筛中具有最佳的催化性能。比较了不同负载梯度（0.25~2%）下 Fe-BEA 的催化性能，发现 1.5%Fe-BEA 具有最佳的催化活性。一系列表征方法表明，1.5%Fe-BEA 中的 Fe 含量最高，形成了更多的活性位，促进了催化反应。反应中的α-O 在活性位上最终将叔丁醇氧化为 CO。Co 主要以 Co 阳离子的形式存在于 Co-BEA 样品中；在制备的 Co-BEA 样品中，2%Co-BEA 具有较高的 Co 含量，表现出最高的活性。
Zotero 插件
