硝酸金属(Ce, Cu, Mn和Co)前驱体对一氧化碳总氧化的影响

Subhashish Dey , Ganesh Chandra Dhal , Ram Prasad , Devendra Mohan
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引用次数: 39

摘要

环境温度一氧化碳氧化是目前研究的重要课题之一。本文以硝酸钴、硝酸铈、硝酸铜和硝酸锰为前驱体制备了不同类型的CO氧化催化剂,其中硝酸铈前驱体在低温下对CO的氧化性能最好。测定了催化剂在停滞空气、流动空气和反应焙烧(空气中CO含量为4.5%)等不同焙烧条件下的活性。在反应器中进行了活性试验,反应条件为:催化剂100mg,空气中CO含量2.5%,反应温度由环境温度升高到更高温度,达到CO完全氧化。采用XRD、FTIR、SEM-EDX、XPS和BET等技术对催化剂进行了表征。不同催化剂的活性顺序为:Ce-Oxide; Mn-Oxide; Cu-Oxide; Co-Oxide。
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Effect of nitrate metal (Ce, Cu, Mn and Co) precursors for the total oxidation of carbon monoxide

The ambient temperature carbon monoxide oxidation is one of the important topics in the present scenario. In this paper, we prepared various types of catalysts from the precursors of cobalt nitrate, cerium nitrate, copper nitrate and manganese nitrate for the oxidation of CO. Among the prepared catalysts, the cerium nitrate precursor showed the best performance for CO oxidation at low temperature. The activity of the catalysts was measured in different calcination conditions like stagnant air, flowing air and reactive calcination (4.5% CO in air). The activity test was done in the reactor under the following reaction conditions: 100 mg of catalyst, 2.5% CO in the air and the reaction temperature was increased from ambient to a higher value at which complete oxidation of CO was achieved. The characterization of the catalyst was done by several techniques like XRD, FTIR, SEM-EDX, XPS and BET. The order of activity for different catalysts was as follows: Ce-Oxide > Mn-Oxide > Cu-Oxide > Co-Oxide.

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