Al2O3催化臭氧化处理邻苯二甲酸二甲酯

'Al₂O₃催化剂对邻苯二甲酸二甲酯(DMP)溶液臭氧化过程的影响结果表明:Al₂O₃可以显著提高臭氧氧化的效果,反应120min后,TOC的去除率从单独臭氧氧化的23.9%提高到55.1%.实验中还考察了制备条件对Al₂O₃催化剂活性的影响并确定了反应的最佳工艺条件.在实验考察的范围内:焙烧温度600℃,Al₂O₃粒径为0.5～1.0mm时催化活性最高;最佳反应工艺条件为:催化剂投加量20g/L,混和气体流速200mL/min,反应温度15℃.通过单独臭氧氧化,单独臭氧氧化后再进行催化剂吸附,催化臭氧化的对比实验证明了Al₂O₃催化剂对体系TOC的去除主要是基于催化作用.

Catalytic Oxidation of Dimethyl Phthalate in Aqueous Solution by Aluminum Oxide

With dimethyl phthalate as the model pollutant and alumina as catalyst, the degradation of TOC system was systemically investigated. Results show that Al2O3 can significantly increase the effect of ozonation, and TOC removal rate in 120 minutes can reach 55.1% while only 23.9% with alone ozone. Al2O3 activeness is upmost under the follow conditions: calcination temperature, 600 degrees C; particle diameter, 0.5 - 1 mm; catalyst dosage, 20 g/L; gas flow rate, 200 mL/min, react temperature, 15 degrees C. The contrastive experiments of alone ozone, catalyst adsorption after ozonation and catalytic ozonation confirmed that catalytic reaction is the most important process to TOC removal in system with alumina as catalyst.