Silica-supported silver catalysts modified by cerium/manganese oxides for total oxidation of formaldehyde

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• 作者：Tamara Kharlamova ; Grigory Mamontov ; Mikhail Salaev ; Vladimir Zaikovskii ; Galina Popova ; Vladimir Sobolev ; Alexei Knyazev ; Olga Vodyankina
• 关键词：Silver catalysts ; Total oxidation ; Formaldehyde ; Ceria ; Manganese oxides
• 刊名：Applied Catalysis A: General
• 出版年：2 October, 2013
• 年：2013
• 卷：467
• 期：Complete
• 页码：519-529
• 全文大小：1848 K

文摘

Silica-supported silver catalysts modified by cerium/manganese oxides were studied as catalysts for total oxidation of formaldehyde. The catalysts were characterized by N₂ adsorption, XRD, and H₂-TPR methods. Catalytic activity of the samples was tested in a flow fixed-bed reactor at atmospheric pressure and 100-200 掳C using a feed gas containing 10,000-22,000 ppm of formaldehyde with a flow rate corresponding to a WHSV of 鈭?9,000 mL/(g_cat h). It was shown that combination of silica support and a small amount of cerium/manganese oxides allows developing silver catalysts with defined micro- and macrostructure as well as high activity in the total oxidation of formaldehyde.