STTR Phase I: Silica-Titania Coated Packing: A Novel Solution Capable of 99% Hg Capture at a Low 20-year Cost

小型企业技术转让（STTR）第一阶段研究项目建议开发一种新型吸附填料材料，该材料浸透了光触媒颗粒，即二氧化硅-二氧化钛涂层填料（STCP），可以经济地捕获烟气中90%以上的汞。汞是一种持久性污染物，会在环境中积累，对人类健康产生负面影响。燃煤电厂是美国最大的人为汞污染源。在拟议的工作中，STCP材料将在模拟烟气和当地电力公司实际烟气的试验台规模实验中进行合成和测试。将确定设计试验和商业装置所需的参数。拟议的工作将开发一种较低成本的去除气体流燃烧中以各种化学形式吸附的汞的方法。商业化后，STCP技术将为电力行业提供一种强大而经济的技术，不会对电厂问题的平衡产生负面影响，也不会损害飞灰的适销性。所提出的技术适用于所有燃煤电厂，特别适合那些燃烧褐煤或亚烟煤的公用事业，这些煤燃烧时产生的单质汞浓度高于离子汞。

The Small Business Technology Transfer (STTR) Phase I Research project proposes to develop a novel adsorbent packing material impregnated with photocatalyst particles, Silica-Titania Coated Packing (STCP), that can economically capture greater than 90% of mercury in flue gas. Mercury is a persistent pollutant that accumulates in the environment and can negatively affect human health. Coal-fired power plants are the largest anthropogenic source of mercury pollution in the United States. In the proposed work, the STCP material will be synthesized and tested in bench-scale experiments with simulated flue gas and in actual flue gas at a local power utility. Parameters needed for the design of pilot and commercial units will be determined. The proposed work would develop a lower cost removal of mercury, adsorbed in all chemical forms, from combustion of gas streams. When commercialized, the STCP technology would offer the power industry a robust and economical technology that does not negatively impact the balance of plant issues, and does not compromise the salability of fly ash. The technology proposed has application to all coal-fired plants, and is particularly well-suited for those utilities that burn lignite or sub-bituminous coal, which when combusted produce higher concentrations of elemental mercury compared to ionic mercury.