Collaborative Research: Development of a Novel Strategy for Using Waste Concrete to Mitigate Industrial Nitrogen Dioxide Emissions and to Inhibit Corrosion

合作研究：开发利用废弃混凝土减少工业二氧化氮排放和抑制腐蚀的新策略

• 批准号: 1537985
• 负责人: Alexander Orlov
• 金额: $ 24.96万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2020-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1537985&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Novel; Strategy

Cement kilns are a significant contributor to anthropogenic nitrogen oxides emissions. This study seeks to demonstrate a promising and novel approach to the air pollution mitigation. A collaborative study will investigate an innovative approach to utilizing waste concrete material which, based on preliminary investigations, can economically and sustainably strip nitrogen dioxide from flue gas. The concrete waste containing sequestered pollutants can then be recycled as either set-accelerating or corrosion-inhibiting admixtures in new concrete. As a result, the approach can potentially turn waste materials into valuable products. The broader applications of the solution are not only in cement manufacturing, but also in incineration plants, boilers, process heaters, glass furnaces, and power plants. This project will be supported by an interdisciplinary team from Stony Brook and Clarkson Universities with highly complementary expertise in materials science, environmental chemistry and engineering, and civil engineering. The educational components of this project will focus on achieving the following objectives: (1) Expanding the undergraduate concentration in environmental engineering and chemistry; (2) Developing case studies that will allow students to grasp the fundamentals in environmental and civil engineering; (3) Increasing the number of underrepresented minority students who will be exposed to environmental chemistry, civil engineering and sustainability topics.The technical approach to achieve the above mentioned outcomes will include several experimental strategies. The nitrogen dioxide absorption capacity of the demolished concrete as a function of particle size, age, type of aggregate, composition, moisture content and ambient relative humidity and temperature will be determined using state of the art experimental methods, including advanced spectroscopic techniques, reactor studies, and microscopy. Subsequently, the newly acquired properties of nitrogen dioxide sequestered concrete, such as set-accelerating and/or corrosion-inhibiting properties, will be analyzed for application in new concrete. More specifically, comprehensive studies focused on hydration kinetics, microstructure development, volumetric porosity, chloride binding capacity, chloride diffusion resistance, and corrosion rate will be conducted using various analytical techniques such as isothermal conduction calorimetry, nano-tomography, and potentiodynamic polarization. The intellectual merits of these approaches are in distinct novelties of the applications and characterization strategies. Moreover, this project will create new knowledge specifying mechanisms of nitrogen dioxide interaction with concrete surface, environmental conditions needed to maximize the uptake, the chemistry of the end products, and the potential utilization of the end products as constituents in new concrete.

水泥窑是人为氮氧化物排放的重要贡献者。这项研究试图证明一种有希望的缓解空气污染的方法。一项协作研究将调查一种创新的方法来利用废物混凝土材料，根据初步研究，可以从烟气中经济和可持续地剥离二氧化氮。然后，可以将含有隔离污染物的混凝土废物回收为新混凝土中的固定加速或抑制混合物。结果，该方法可能会将废料变成有价值的产品。 该解决方案的更广泛应用不仅在水泥制造中，还包括焚化厂，锅炉，工艺加热器，玻璃炉和发电厂。该项目将得到Stony Brook和Clarkson大学的跨学科团队的支持，在材料科学，环境化学和工程以及土木工程方面具有高度互补的专业知识。该项目的教育组成部分将着重于实现以下目标：（1）扩大环境工程和化学方面的本科集中度； （2）开发案例研究将使学生能够掌握环境和土木工程中的基础知识； （3）增加将接触环境化学，土木工程和可持续性主题的代表性不足的少数族裔学生的数量。实现上述成果的技术方法将包括几种实验策略。将使用艺术实验方法的状态（包括晚期光谱技术，反应器研究和显微镜）确定，将拆除混凝土的氮二氧化碳吸收能力与粒径，年龄，骨料类型，组成，水分含量和环境相对湿度和温度确定。随后，将分析新的二氧化二氧化二氧化混凝土的新获得的特性，例如固定加速和/或抑制腐蚀特性，以在新混凝土中的应用中进行分析。更具体地说，将使用各种分析技术（例如等温分析技术，例如等温分析技术）进行综合研究，重点介绍水合动力学，微观结构发展，体积孔隙率，氯化物结合能力，氯化物扩散抗性和腐蚀速率。这些方法的智力优点是应用和表征策略的不同新颖性。此外，该项目将创建新的知识指定二氧化氮与混凝土表面，最大化摄取所需的环境条件的机制，最终产物的化学性质以及最终产物作为新混凝土中最终产物的潜在利用。