-新型三组份催化剂在臭氧化降解有机物中的应用及优化终稿1学士学位论文VIP专享

新型三组份催化剂在臭氧化降解有机物中的应用及优化摘要水环境污染是普遍存在的问题．对于水中具有高化学稳定性、有毒难生物降解的有机污染物，基于强氧化性和无污染性，臭氧氧化技术得到极大的进展，但它单独臭氧氧化技术存在高选择性和高耗能性，因此基于强化臭氧氧化技术引起水处理工作的极大兴趣，其中尤以催化臭氧化技术最受关注。对于催化臭氧化技术，固体催化剂性能选择是催化体系是否具有高氧化性的关键。为了提高臭氧化降解乙酸的效率，本实验通过通过浸渍法制备了一种新型催化 V2O5-TiO2-AlF3/Al2O3催化剂，通过催化臭氧化过程中乙酸的降解效果来评价催化剂的活性。同时实验还讨论了制备催化剂的条件对催化剂活性的影响（如催化剂前驱体浓度的选择、催化剂表明钒钛比等），结果表明,增加前驱体的浓度或增大催化剂表面钒钛比都有助于增加催化活性。此外实验还优化各工艺参数对乙酸去除率的影响，如 pH,臭氧功率，气流率等。实验还进一步探讨该催化体系的机理，叔丁醇实验表明，VO2-TiO2/Al2O3催化臭氧化降解乙酸机制符合羟基自由基机理。关键词：催化臭氧化， V2O5-TiO2-AlF3/Al2O3，羟基自由基，乙酸CATALYTIC OZONE OXIDATION DEGRADATION ACETIC ACIDABSTRACTWater pollution is a widespread problem. For those organic pollutants with high chemical stability and toxic non-biodegradable in water，ozone oxidation technology has been tremendous growth based on its strong oxidizing and non-polluting, but separate ozone oxidation technology of high selectivity and high energy consumption, therefore causing great interest of water treatment based on strengthening the ozone，which catalytic ozonation was gotten most attention. For catalytic ozonation technology, catalyzed by solid catalyst selection is the key to whether the system has high oxidation. In order to improve the efficiency of the ozonation of acetic acid , prepared by impregnation method the catalyst V2O5-TiO2-AlF3/Al2O3 . Acetic acid degradation catalytic ozonation process to evaluate the catalytic activity. The factors affecting the catalyst activity ( such a...