摘要
在微波强化ClO2催化氧化处理活性黄染料废水工艺中，考察CuOn-La2O3／γ-Al2O3催化剂的使用寿命，并通过ICP、XPS、BET等测试，分析高级氧化水处理工艺中催化剂失活的原因，应用微波辐照法对CuOn-La2O3／γ-Al2O3催化剂进行再生试验研究。结果表明，催化剂活性下降的主要原因是活性组分的少量流失及表面积炭覆盖了催化剂的活性位。通过正交试验确定了微波辐照法再生催化剂的最佳工艺，当微波功率为500W，辐照时间30min，加热介质SiC与催化剂比值2：1时，再生催化剂的活性可以恢复到新鲜催化剂的91、67％，效果好于常规的乙醇萃取再生和硝酸氧化再生。XPS测试结果进一步证明，微波辐照再生后，催化剂表面的积炭得到了很好的去除．
The catalytic activity and stability of CuOn-La2O3/γ-Al2O3 catalyst was studied in the microwave-enhanced ClO2 catalytic oxidation process. Main reasons for decrease of catalyst activity were discussed by analyzing the results of ICP, XRD and XPS, and catalyst regeneration experiment was carried out under microwave irradiation. The results showed that the main reasons for decrease of catalyst activity in ClO2 catalytic oxidation of remazol golden yellow dye wastewater with CuOn-La2O3/γ-Al2O3 as the catalyst was that the leaching of effective ions and degradation intermediates covered the activity position of catalyst. As the degradation intermediates attach to the appearance of catalyst loosely, and can be removed off under high temperature, the catalyst can be regenerated under microwave irradiation. When microwave power was 500 W, irradiation time was 30 min, the quality ratio of SiC and CuOn-La2O3/γ-Al2O3 was 2：1, the catalytic activity of regenerated catalyst would be recovered to be 91.67% as fresh catalyst. Compared with rinsing deactivated catalysts in absolute alcohol and HNO3, microwave irradiation is the best methods of catalyst regeneration. The XPS results also indicated that the degradation intermediates on the catalyst surface were effectively removed under microwave irradiation.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A09期3326-3329,共4页
Journal of Functional Materials
基金
高校博士点专项科研基金资助项目（20040213027）
国家自然科学基金资助项目（50678045）
关键词
微波辐照
催化剂
失活
再生
microwave irradiation
catalyst
deactivation
regeneration
