| 王艳敏,于超英,孟旭,赵培庆,丑凌军,陈革新.CexMn1-xO2复合氧化物的制备及催化湿式氧化降解高浓度有机酸的应用[J].分子催化,2017,31(5):428-437 |
| CexMn1-xO2复合氧化物的制备及催化湿式氧化降解高浓度有机酸的应用 |
| The Preparation of CexMn1-xO2 Mixed Oxides and the Applications for Catalytic Wet Air Oxidation of High Concentration Organic Acids |
| 投稿时间：2017-07-03 修订日期：2017-08-10 |
| DOI： |
| 中文关键词: 复合氧化物 催化湿式氧化 有机酸 纳米球 |
| 英文关键词:mixed oxides catalytic wet air oxidation organic acids nanospheres |
| 基金项目:国家自然科学基金项目（No.21403256，21573261） |
|
| 摘要点击次数: 1771 |
| 全文下载次数: 2954 |
| 中文摘要: |
| 利用水热法制备CeO2和一系列不同Ce/Mn原子比的CexMn1-xO2复合氧化物的纳米球，对其进行XRD、XPS、SEM、H2-TPR和N2吸附-脱附的表征，并通过催化湿式氧化降解丁酸对催化活性进行测试，结果表明Ce0.2Mn0.8O2对丁酸的降解呈现出优异的催化性能.该催化剂对高浓度的醋酸、丁酸以及两者混合酸的降解也具有高的催化活性，在185℃、0.9 MPa O2条件下反应2 h，醋酸、丁酸以及两者混合酸COD（化学需氧量）的去除率分别高达89.8%、99.5%和99.4%.最后，对该催化剂催化湿式氧化降解丁酸、醋酸以及丁酸和醋酸的混合酸进行了动力学和稳定性方面的研究. |
| 英文摘要: |
| CeO2 nanospheres and CexMn1-xO2 nanospheres were prepared by PVP-assisted hydrothermal method and characterized by SEM, XPS, XRD, H2-TPR and N2 absorption-desorption. The catalytic wet air oxidation (CWAO) behavior of high concentration organic acids, including acetic acid, butyric acid and the mixture of acetic acid and butyric acid, is tested over the Ce0.2Mn0.8O2 nanosphere, which turns out to be an efficient catalyst for the activation and degradation of high concentration organic acids. When the reaction operated at 0.9 MPa partial pressure of O2, 185℃ for 2 h, the chemical oxygen demand (COD) removal can reach up to 89.8%, 99.5% and 99.4% for acetic acid, butyric acid and the mixture of acetic acid and butyric acid, respectively. Noticeably, the kinetic studies of CWAO for three kinds of organic acids over the Ce0.2Mn0.8O2 reveal that the degradation of sole acid is easier than that of mixture acid. In addition, the Ce0.2Mn0.8O2 oxides perform a good reusability during the cycle experiment even after six cycles. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
