| 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 |
| 摘要点击 2220 全文点击 1674 投稿时间：2006-09-24 修订日期：2006-11-01 |
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| 中文关键词 催化湿式氧化 铁酸盐 溶出 草酸 甲酸 乙酸 水杨酸 |
| 英文关键词 catalytic wet air oxidation zinc-aluminium ferrite leaching oxalic acid formic acid acetic acid salicylic acid |
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| 中文摘要 |
| 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． |
| 英文摘要 |
| 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℃ 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. |
