| 羧酸类有机物催化湿式氧化过程中ZnFe0.25Al1.75O4催化剂的稳定性研究 |
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| 引用本文： | 徐爱华,杨民,杜鸿章,彭福勇,孙承林.羧酸类有机物催化湿式氧化过程中ZnFe0.25Al1.75O4催化剂的稳定性研究[J].环境科学,2007,28(7):1455-1459. |
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| 作者姓名： | 徐爱华 杨民 杜鸿章 彭福勇 孙承林 |
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| 作者单位： | 中国科学院大连化学物理研究所，大连116023;中国科学院大连化学物理研究所，大连116023;中国科学院大连化学物理研究所，大连116023;中国科学院大连化学物理研究所，大连116023;中国科学院大连化学物理研究所，大连116023 |
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| 基金项目： | 国家高技术研究发展计划(863)项目(2002AA601260) |
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| 摘 要： | 草酸、甲酸和乙酸是催化湿式氧化过程3种最主要的小分子羧酸类中间产物．比较了ZnFe0.25Al1.75O4催化剂降解这3种物质时的催化活性和铁离子溶出量的大小．160℃下草酸是唯一可被完全降解的物质，降解过程中铁溶出量高达9.5 mg·L-1；而甲酸和乙酸对铁离子稳定性影响很小．由于草酸具有很强的酸性和还原性，铁溶出量在氮气气氛中比在氧气气氛中大．ZnFe0.25Al1.75O4催化剂对水杨酸也具有很高的降解活性和稳定性．
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| 关 键 词： | 催化湿式氧化 铁酸盐 溶出 草酸 甲酸 乙酸 水杨酸 |
| 文章编号： | 0250-3301（2007）07-1455-05 |
| 收稿时间： | 2006/9/24 0:00:00 |
| 修稿时间： | 2006-09-242006-11-01 |
Catalytic Stability in Wet Air Oxidation of Carboxylic Acids over ZnFe0.25Al1.75O4 Catalyst |
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| XU Ai-hu,YANG Min,DU Hong-zhang,PENG Fu-yong and SUN Cheng-lin.Catalytic Stability in Wet Air Oxidation of Carboxylic Acids over ZnFe0.25Al1.75O4 Catalyst[J].Chinese Journal of Environmental Science,2007,28(7):1455-1459. |
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| Authors: | XU Ai-hu YANG Min DU Hong-zhang PENG Fu-yong and SUN Cheng-lin |
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| Institution: | 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Oxalic, formic and acetic acid are main intermediate products in catalytic wet air oxidation process (CWAO). The catalytic activity and stability in CWAO of the three short-chain organic acids over ZnFe0.25Al1.75O4 catalyst were studied. Oxalic acid is the only oxidizable intermediate and the largest amount of Fe leaching is 9.5 mg L(-1) at 160 degrees C during CWAO process. Formic and acetic acid have little influence on Fe leaching. Due to the strong reducible ability of oxalic acid, the amount of Fe leaching is larger in nitrogen atmosphere than that in oxygen atmosphere. Salicylic acid can be also degraded by ZnFe0.25Al1.75O4 catalyst with a high catalytic activity and stability. |
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| Keywords: | catalytic wet air oxidation zinc-aluminium ferrite leaching oxalic acid formic acid acetic acid salicylic acid |
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