Rakitskaya Tatyana L, Kiose Tatyana A, Golubchik Kristina O, Ennan Alim A, Volkova Vitalia Y
Department of Inorganic Chemistry and Chemical Ecology, Odessa I.I. Mechnikov National University, 2, Dvoryanskaya St., Odessa, 65082, Ukraine.
Physicochemical Institute of Environment and Human Protection, 3, Preobrazhenskaya St., Odessa, 65082, Ukraine.
Chem Cent J. 2017 Mar 27;11(1):28. doi: 10.1186/s13065-017-0256-6.
Samples of natural clinoptilolite were modified by an acid-thermal method at nitric acid concentrations of 0.25, 0.5, 1.0, and 3.0 M and a contact time of 30 min. A series of catalysts, KPdCl-Cu(NO)-KBr/S (S = 0.25H-CLI, 0.5H-CLI, 1H-CLI, and 3H-CLI) was obtained. All samples were investigated by X-ray phase and thermogravimetric analysis, FT-IR spectroscopy, water vapor ad/desorption and pH metric method. Besides, KPdCl-Cu(NO)-KBr/S samples were tested in the reaction of low-temperature carbon monoxide oxidation. It have been found that, owing to special physicochemical and structural-adsorption properties of 3H-CLI, it promotes formation of the palladium-copper catalyst providing carbon monoxide oxidation at the steady-state mode down to CO concentrations lower than its maximum permissible concentration at air relative humidity varied within a wide range.
天然斜发沸石样品通过酸热法在硝酸浓度为0.25、0.5、1.0和3.0 M且接触时间为30分钟的条件下进行改性。获得了一系列催化剂，即KPdCl-Cu(NO)-KBr/S（S = 0.25H-CLI、0.5H-CLI、1H-CLI和3H-CLI）。所有样品均通过X射线相分析和热重分析、傅里叶变换红外光谱、水蒸气吸附/脱附以及pH测量法进行研究。此外，还对KPdCl-Cu(NO)-KBr/S样品进行了低温一氧化碳氧化反应测试。结果发现，由于3H-CLI具有特殊的物理化学和结构吸附特性，它促进了钯-铜催化剂的形成，使得在空气相对湿度在很宽范围内变化时，能在稳态模式下将一氧化碳氧化至低于其最大允许浓度的浓度。
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