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以硝酸铜水溶液(浓度50.0g/L)浸渍母体分子筛(NaA,CaA,NaX和CaX)2h,干燥1h并在450℃焙烧6h后制得CuO/分子筛夹心型吸附剂-催化剂.活性组分(CuO)在母体分子筛上沉积的涂层厚度约1mm.采用原子吸收光谱、X射线衍射、红外光谱和差示扫描量热等技术对母体分子筛、浸渍介质和吸附剂-催化剂进行了表征.将该吸附剂-催化剂用于醇(甲醇、丙醇和丁醇)蒸气的催化氧化,催化活性实验在固定床石英反应器中于100～350℃下进行,测定了生成的副产物及其在空气流中的浓度.结果表明,在200～250℃时生成的副产物量最多.CuO/分子筛催化剂的使用寿命为120d,在此期间,该吸附剂-催化剂对醇氧化成CO2和H2O具有活性.随着醇分子量的增加和醇初始浓度的降低,起燃温度和完全氧化温度降低.
CuO / molecular sieve sandwich adsorbent-catalyst was prepared by impregnating precursor molecular sieves (NaA, CaA, NaX and CaX) with copper nitrate aqueous solution (concentration 50.0g / L) for 2h, drying for 1h and calcining at 450 ℃ for 6h. CuO) was deposited on the precursor molecular sieve to a thickness of about 1 mm.The precursor molecular sieves, impregnating media and adsorbent-catalysts were characterized by atomic absorption spectroscopy, X-ray diffraction, infrared spectroscopy and differential scanning calorimetry Adsorbent-Catalysts for the Catalytic Oxidation of Alcohols (Methanol, Propanol and Butanol) Vapors, Catalytic Activity Experiments were carried out in a fixed-bed quartz reactor at 100-350 ° C. The by-products formed and their effect on air flow The results showed that the amount of by-products generated was the highest at 200-250 ° C. The service life of the CuO / zeolite catalyst was 120 days, during which time the adsorbent-catalyst was active for the oxidation of alcohols to CO2 and H2O. The increase of alcohol molecular weight and the initial concentration of alcohol reduced the light-off temperature and the complete oxidation temperature.