纳米纤维催化滤料协同氧化烟气中零价汞和挥发性有机物的机理研究

Considering the increasing pressure on the reduction of mercury and volatile organic compounds (VOCs) from coal-fired flue gas in China, this proposal develops a novel approach of simultaneous catalytic oxidation of elemental mercury and VOCs from flue gas by nanofibrous materials at low temperatures. Catalytic nanofibers can be synthesized by electrospinning method. The effects of material and process parameters on the morphology and the catalytic performances of the nanofibrous catalysts towards elemental mercury and VOCs oxidation will be systematically investigated. Based on the analysis of physicochemical properties of the nanofibrous catalysts, the relationship between structure and activity will be revealed; then the activity of simultaneous catalytic oxidation of elemental mercury and VOCs will be evaluated. By means of microstructure modulation and formulation design, efficient simultaneous removal of elemental mercury and VOCs could be achieved. In addition, the competitive adsorption and reaction mechanism during simultaneous catalytic oxidation will also be investigated theoretically and experimentally; furthermore, the role of various gas components in flue gas and the coupling mechanism between them will also be illustrated. A better understanding of the simultaneous removal of elemental mercury and VOCs by catalytic nanofibers will finally be provided.

鉴于我国面临的燃煤烟气汞和挥发性有机物（VOCs）减排压力不断增大，本项目提出利用静电纺纳米纤维（毡）低温条件下协同催化氧化烟气中零价汞和挥发性有机物的新思路。采用静电纺丝法制备纳米纤维催化滤料，研究制备参数对纳米纤维形貌结构以及零价汞、VOCs氧化性能的影响规律，揭示纳米纤维零价汞、VOCs氧化的构效关系；研究纳米纤维对零价汞和VOCs的协同氧化效果，通过纳米纤维结构调控和配方优化，实现零价汞和VOCs的高效协同氧化，揭示协同反应过程中的竞争机制和反应机理；阐明烟气成分对零价汞和VOCs氧化的影响规律及其耦合机制，形成纳米纤维催化滤料协同脱除零价汞和VOCs的新方法。

鉴于我国面临的挥发性有机物（VOCs）减排压力不断增大，本项目提出利用静电纺纳米纤维低温条件下催化氧化烟气中挥发性有机物的新思路。采用静电纺丝法制备纳米纤维催化滤料，研究了制备参数对纳米纤维形貌结构以及VOCs氧化性能的影响规律，揭示了纳米纤维VOCs氧化的构效关系；通过纳米纤维结构调控和配方优化，实现了VOCs的高效氧化；阐明烟气成分对纳米纤维催化氧化活性的影响规律，形成了纳米纤维催化滤料协同脱除细颗粒物和VOCs的新方法。在项目执行期间，发表SCI论文4篇；申请国家发明专利5项，实用新型专利2项，其中已授权6项。