Gas-phase photocatalytic oxidation of refractory VOCs mixtures: Through the net of process limitations
Gas-phase photocatalytic oxidation of refractory VOCs mixtures: Through the net of process limitations
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难熔 VOC 混合物的气相光催化氧化：突破工艺限制
DOI：
10.1016/j.cattod.2016.03.041
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发表时间：
2017
期刊：
影响因子：
5.3
通讯作者：
Deubener
中科院分区：
文献类型：
--
作者：
Krichevskaya;Moiseev;Pronina;Deubener
光催化氧化挥发性有机物（VOCs）是一种有效的室内空气处理手段。然而，缺点包括相对较低的氧化速率，有时形成有毒副产物和催化剂失活。这些障碍将通过合成活性催化材料和在适当选择的工艺参数下有效的催化剂再生来克服。本文介绍了一种新型火焰气溶胶合成的纳米结构二氧化钛F3的光催化性能和使用少量臭氧加速光催化剂活性恢复的方法。在将F3的性能与市售的基准光催化剂P25进行比较之后，进行了PCO减少混合物中挥发性有机化合物的实验研究。在F3和P25光催化剂下，丙烯酸、丙烯腈和甲苯的混合物可降解；在P25光催化剂下，丙烯腈、苯乙烯和甲苯的混合物可降解；臭氧也用于P25的再生。接触时间、混合物中挥发性有机化合物和臭氧浓度、温度和空气湿度均有变化。在实验条件下，新型光催化剂的活性大大超过了基准：在实验条件下，与P25相反，F3没有表现出失活症状，仅释放出微量的有毒HCN产物。这种新型光催化剂在治理VOCs混合物方面具有良好的效果。臭氧对VOCs的PCO和光催化剂活性的恢复都有有效的辅助作用，大大缩短了光催化剂的再生时间。
Photocatalytic oxidation (PCO) of volatile organic compounds (VOCs) presents an effective means of indoors air treatment. Shortcomings, however, include relatively low oxidation rate, sometimes formation of toxic by-products and catalyst deactivation. These obstacles are to be surmounted via synthesis of active catalytic materials and efficient catalyst regeneration at properly chosen process parameters. The article describes the photocatalytic performance of a novel flame aerosol synthesised nano-structured titania F3 and the method of accelerated photocatalyst activity restoration using small amounts of ozone. The experimental research into PCO abating VOCs in mixtures was undertaken following the performance of F3 compared to the benchmarking commercially available photocatalyst P25. The mixture containing acrylic acid, acrylonitrile and toluene was degraded at F3 and P25 photocatalysts, whereas the mixture of acrylonitrile, styrene and toluene—at P25 with admixtures of ozone; ozone was also used for regeneration of P25. The contact time, VOCs and ozone concentration in mixtures, temperature, and air humidity varied. In the experimental conditions, the novel photocatalyst showed activity substantially surpassing the one of the benchmark: within the experimental conditions, F3, contrary to P25, showed no symptoms of deactivation, emitting only trace amounts of toxic HCN product. The novel photocatalyst thus confirmed its promising efficiency in abatement of VOCs mixtures. Ozone appeared to be effective aid in both PCO of VOCs and the photocatalyst activity restoration dramatically shortening the photocatalyst regeneration time.
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影响因子：
15.1
作者：
Batault, F.;Thevenet, F.;Locoge, N.
通讯作者：
Locoge, N.
苯乙烯-臭氧反应的低温红外研究。
DOI：
--
发表时间：
1979
期刊：
影响因子：
--
作者：
I. Hisatsune;K. Shinoda;J. Heicklen
通讯作者：
J. Heicklen
从多分散性和相变角度分析纳米结构热解二氧化钛粉末的光催化性能：临界锐钛矿粒径作为抑制电荷复合的因素
影响因子：
15.1
作者：
Moiseev;Krichevskaya;Deubener
通讯作者：
Deubener
影响因子：
22.1
作者：
Joks, Svetlana;Klauson, Deniss;Deubener, Joachim
通讯作者：
Deubener, Joachim