| Fe-MCM-41催化臭氧氧化间甲酚废水 |
| 摘要点击 2025 全文点击 1009 投稿时间：2014-08-12 修订日期：2014-11-10 |
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| 中文关键词 Fe-MCM-41 间甲酚 臭氧 催化臭氧氧化 多相催化 |
| 英文关键词 Fe-MCM-41 m-cresol ozone catalytic ozonation heterogeneous catalysis |
| 作者 | 单位 | E-mail | | 孙文静 | 中国科学院大连化学物理研究所, 大连 116023
中国科学院大学化学与化工学院, 北京 100049 | sunwenjing14@mails.ucas.ac.cn | | 王亚旻 | 中国科学院大连化学物理研究所, 大连 116023 | | | 卫皇曌 | 中国科学院大连化学物理研究所, 大连 116023 | | | 王森 | 中国科学院大连化学物理研究所, 大连 116023
中国科学院大学化学与化工学院, 北京 100049 | | | 李旭宁 | 中国科学院大连化学物理研究所, 大连 116023 | | | 李敬美 | 中国科学院大连化学物理研究所, 大连 116023 | | | 孙承林 | 中国科学院大连化学物理研究所, 大连 116023 | clsun@dicp.ac.cn | | 安路阳 | 中钢集团鞍山热能研究院有限公司, 炼焦技术国家工程研究中心, 鞍山 114044 | |
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| 中文摘要 |
| 首次应用Fe-MCM-41催化臭氧氧化间甲酚废水. 研究了铁的掺杂质量分数、催化剂质量浓度和底物质量浓度对间甲酚转化率和TOC去除率的影响,并采用XRD、H2-TPR、穆斯堡尔谱、BET对催化剂的结构性质进行表征. 结果表明,铁的掺杂质量分数对Fe-MCM-41在催化臭氧氧化间甲酚中的活性具有较大影响,最佳掺杂质量分数为4.4%. 随着铁掺杂质量分数的提高,介孔分子筛的结晶度减弱,介孔结构晶面间距减小,比表面积、孔容、平均孔径整体上呈下降趋势,Fe在介孔分子筛表面仅以γ-Fe2O3形式存在,且催化剂具有良好的铁磁性和稳定性. 臭氧在反应中既有直接氧化作用也有间接氧化作用,且二者比近似为1:1. 在模型废水原始pH值条件下,使用Fe掺杂质量分数为4.4%的催化剂,当间甲酚初始质量浓度为500mg ·L-1,催化剂质量浓度为0.1g ·L-1时,30 min内间甲酚转化率为100%,TOC去除率为26.8%. |
| 英文摘要 |
| Fe-MCM-41 was first used for the treatment of m-cresol in catalytic ozonation. The effect of the percentage of Fe dopping mass, catalyst dosage and the natural concentration of substrate on m-cresol conversion and TOC removal were studied.The structural property of Fe-MCM-41 was characterized by X-ray diffraction,temperature-programmed reduction,Mössbauer spectra and BET of catalysts.The results showed that Fe dopping mass had a great effect on the catalytic activity of Fe-MCM-41 in catalytic ozonation and the optimal percentage of dopping mass was 4.4%(wt).The results showed that with Fe dopping mass increase,the degree of crystallinity became weaker, the crystal surface distance reduced,as well as the specific surface area,pore volume and aperture. γ-Fe2O3 was the only form staying on the surface of MCM-41, and the catalyst had good ferromagnetism and stability. Ozonation played a role of both direct oxidation and indirect oxidation in the reaction, approximately the same ratio.Under the experimental condition of the natural pH of model wastewater,using 4.4%(wt) Fe-MCM-41 as catalyst, natural concentration of m-cresol 500 mg ·L-1, catalyst dosage 0.1g ·L-1 and reaction time 30 min, m-cresol conversion and TOC removal were 100% and 26.8%,respectively. |
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