| 多层光源内置式气-液-固循环流化床光催化降解双酚A |
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| 引用本文： | 全学军,程治良,杨露,项锦欣,赵清华.多层光源内置式气-液-固循环流化床光催化降解双酚A[J].环境科学学报,2011,31(6):1233-1240. |
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| 作者姓名： | 全学军 程治良 杨露 项锦欣 赵清华 |
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| 作者单位： | 重庆理工大学化学化工学院,重庆,400050 |
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| 基金项目： | 重庆市科技攻关计划项目(No.CSTC2009AB1048) |
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| 摘 要： | 悬浮浆态光催化反应体系具有固-液接触面积大、过程效率高和处理量较大的优点,但存在浆态体系中纳米催化剂难于分离回收的问题,为解决这一难题,提出了在废水污染物光催化降解过程中使用易于沉降分离的微米级颗粒光催化荆,并与新设计的多层光源内置式气-液-固循环流化床相结合组成的光催化反应体系.以微米级颗粒Gd-TiO2为光催化剂,...
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| 关 键 词： | 流化床光催化反应器 钆掺杂二氧化钛 光催化降解 双酚A |
| 收稿时间： | 2010/8/13 0:00:00 |
| 修稿时间： | 2010/9/20 0:00:00 |
Photocatalytic degradation of bisphenol A in a gas-liquid-solid circulating fluidized bed photoreactor with internal multi-layered lamps using Gd-doped TiO2 particles |
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| QUAN Xuejun,CHENG Zhiliang,YANG Lu,XIANG Jinxin and ZHAO Qinghua.Photocatalytic degradation of bisphenol A in a gas-liquid-solid circulating fluidized bed photoreactor with internal multi-layered lamps using Gd-doped TiO2 particles[J].Acta Scientiae Circumstantiae,2011,31(6):1233-1240. |
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| Authors: | QUAN Xuejun CHENG Zhiliang YANG Lu XIANG Jinxin and ZHAO Qinghua |
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| Institution: | College of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400050,College of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400050,College of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400050,College of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400050 and College of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400050 |
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| Abstract: | A new photocatalytic degradation process combining particle and gas-liquid-solid circulating fluidized bed photoreactor (GLSCFBPR) technologies is proposed, in order to take the advantage of suspended slurry photocatalytic systems that can maximize the efficiency of photon utilization, oxidation rates and reactor throughput, and to solve the separation problem of nanophotocatalysts from the slurry system. The performance of the proposed process was evaluated using Gd doped TiO2 microparticles as photocatalyst and bisphenol A as model pollutant. Photocatalyst concentration, superficial gas velocity and superficial liquid velocity all have a corresponding optimum value in the new reactor system. When the micrometer Gd-TiO2 was used, the optimum operation conditions were photocatalyst concentration 6 g·L-1, superficial gas velocity 8.34×10-3m·s-1 and superficial liquid velocity 1.11×10-2 m·s-1. Under the optimized operation conditions, the Gd-TiO2 fluidized system exhibited superior photocatalytic degradation and sedimentation separation performance to that of the P25-TiO2 slurry system. Therefore, the new photocatalytic reactor system combining easily separable microparticles and a gas-liquid-solid circulating fluidized bed reactor is highly suitable for large-scale industrial applications of photocatalysis for water treatment and purification. |
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| Keywords: | fluidized bed photoreactor Gd doped titanium dioxide photocatalytic degradation bisphenol A |
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