催化电解亚氯酸钠制备高纯二氧化氯

发布时间：2018-04-03 06:48

  本文选题：二氧化氯　切入点：电解　出处：《功能材料》2017年09期

【摘要】：采用热分解法在钛金属片表面制得氧化铈(CeO_2)、氧化钨(WO_3)和氧化钌(RuO_2)催化层,以扫描电子显微镜(SEM)和X射线衍射(XRD)表征电极的形貌和晶体结构。以该电极为阳极,电解亚氯酸钠制备二氧化氯,考察了不同金属氧化物、反应物浓度、温度和电压等因素对二氧化氯产生的影响。结果表明,氧化钌催化电解亚氯酸钠的活性要远优于氧化钨和氧化铈。当NaClO_2浓度相差较大时,电解得到的二氧化氯浓度也相差较大,但电解转化率相差不大。温度越高,反应转化率和二氧化氯浓度也越高,20,40,60℃下电解0.1mol/L NaClO_2转化率分别为93.5%,98.1%和99.8%,产生的二氧化氯浓度分别达到6 212,6 343和6 618mg/L,在不同电压下电解NaClO_2,电压越高,二氧化氯浓度和转化率也越大,但电压越高,由于副反应的加剧,会导致单位耗电量的大幅增加。与8V下相比,12和15V电压下电解得到的二氧化氯总量分别增加了16.9%和39.3%,但单位耗电量却分别增加了54.5%和190.7%。
[Abstract]:Ce _ 2O _ 2 (W _ 2O _ 3) and ruthenium oxide Ruo _ 2) catalytic layers were prepared on the surface of titanium by thermal decomposition. The morphology and crystal structure of the electrode were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD).Using the electrode as anode, chlorine dioxide was prepared by electrolyzing sodium chlorite. The effects of different metal oxides, reactant concentration, temperature and voltage on the production of chlorine dioxide were investigated.The results show that the catalytic activity of ruthenium oxide in electrolytic sodium chlorite is much better than that of tungsten oxide and cerium oxide.When the concentration of NaClO_2 varies greatly, the concentration of chlorine dioxide obtained by electrolysis also varies greatly, but the electrolysis conversion is not different.娓╁害瓒婇珮,鍙嶅簲杞�鍖栫巼鍜屼簩姘у寲姘�娴撳害涔熻秺楂，

本文编号：1704072