Nanoporous Sorbents for Mercury Removal from Flue Gases

用于去除烟气中汞的纳米多孔吸附剂

• 批准号: 6990840
• 负责人: HARIPRASAD GALI
• 金额: $ 11.56万
• 依托单位: LYNNTECH, INC.
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-01-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6990840
• 关键词: air filtration; biomedical equipment development; environmental exposure; industrial waste; mercury poisoning; vapor; waste disposal

DESCRIPTION (provided by applicant): Mercury is a significant environmental concern because of its toxicity, persistence in the environment, and bioaccumulation in the food chain. Approximately 80% of all U.S. mercury emissions come from coal-fired power plants and waste incinerators. Mercury is difficult to control in flue gas because it exists as a vapor, which easily passes through conventional particulate control devices. Activated carbon injection has been demonstrated as a control technology for waste incinerators to capture mercury along with fly ash in particulate control devices. However, for efficient removal of mercury a large quantity of activated carbon sorbent is needed, which creates fly ash utilization and disposal problems. To overcome these limitations, Lynntech is developing a new nanoporous sorbent for efficient and cost-effective removal of mercury from flue gas. The goal of this proposed research is to develop and commercialize a cartridge system containing the new nanoporous sorbent that can be easily retrofitted into the existing waste incinerators and power plants. Preliminary studies performed with this sorbent using mercury vapor demonstrated >99.9% mercury removal. The overall aim of Phase I is to optimize compositions to maximize mercury capacity and minimize manufacturing cost. A series of candidate sorbent materials will be generated and tested in simulated waste incinerator flue gas. The best-performing candidates will be selected for additional testing to characterize the effects of feed gas variation and composition. Methods for sorbent recycling will be developed.

说明（由申请方提供）：汞具有毒性，在环境中具有持久性，并在食物链中具有生物蓄积性，因此是一个重大的环境问题。美国约80%的汞排放来自燃煤发电厂和废物焚烧炉。汞在烟道气中难以控制，因为它以蒸汽形式存在，很容易通过传统的颗粒控制装置。活性炭喷射已被证明是废物焚烧炉的一种控制技术，可将汞沿着飞灰捕获到颗粒控制装置中。然而，为了有效地去除汞，需要大量的活性炭吸附剂，这产生了飞灰利用和处置问题。为了克服这些局限性，Lynntech正在开发一种新的纳米多孔吸附剂，用于高效、经济地去除烟气中的汞。这项拟议研究的目标是开发和商业化一种含有新的纳米多孔吸附剂的盒系统，该系统可以很容易地改造成现有的垃圾焚烧炉和发电厂。使用汞蒸气对该吸附剂进行的初步研究表明，汞去除率>99.9%。第一阶段的总体目标是优化成分，以最大限度地提高汞容量并最大限度地降低制造成本。一系列的候选吸附剂材料将在模拟垃圾焚烧炉烟气中产生和测试。将选择表现最好的候选产品进行额外测试，以表征原料气变化和组成的影响。将开发吸附剂再循环的方法。