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摘要: 采用程序升温氧化(TPO)技术和吸附催化氧化循环实验,研究了金属担载量对CuO/AC催化-吸附剂干法催化氧化苯酚的影响。结果表明,随着金属担载量的增加,CuO/AC催化-吸附剂的苯酚催化氧化活性升高,并且苯酚与催化-吸附剂之间的相互作用增强,使吸附的苯酚不易脱附/降解脱附。同时,CuO/AC催化吸附剂自身的烧蚀活性也随金属担载量的增加而升高。对于吸附-干法催化氧化法而言,CuO/AC存在一个较佳的金属担载量范围,该范围以Cu的质量分数计为3%~5%。
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关键词:
- 担载量 /
- CuO/AC催化-吸附剂 /
- 干法催化氧化 /
- 苯酚
Abstract: Adsorption of organic pollutants from waste waters at ambient conditions followed by catalytic dry oxidation of these adsorbed materials at low temperatures has been reported to be a promising method for the treatment of toxic and/or biorefractory wastewaters. This work mainly investigated the effect of metal loadings on the catalytic activity of the CuO/AC catalystsorbent used for the catalytic dry oxidation of phenol through temperatureprogrammed oxidation (TPO) and consecutive adsorptionoxidation experiments. The results indicate that increasing metal loadings promotes the phenol oxidation activity of the CuO/AC catalystsorbent, and enhances the affinity between the phenol and the CuO/AC catalystsorbent. This makes the adsorbed phenol desorb and/or deassociatively desorb from the catalystsorbent difficult. In addition, the ignition activity of the CuO/AC catalystsorbent itself is improved with increasing metal loadings. According to these results, it is clear that there is a proper metal loadings range of 3 ~ 5% for the CuO/AC catalystsorbent used for catalytic dry oxidation of phenol, which is calculated as the Cu weight percent.-
Key words:
- metal loadings /
- CuO/AC catalystsorbent /
- catalytic dry oxidation /
- phenol
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