Collaborative Research: Removal of Toxic Gases by Intercalation and Reactive Adsorption

合作研究：插层和反应吸附去除有毒气体

• 批准号: 0754979
• 负责人: Keith Gubbins
• 金额: $ 12.21万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-04-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0754979&HistoricalAwards=false
• 关键词: Collaborative; Research; Removal; Toxic; Gases

CBET-0754979GubbinsThis NSF award by the Chemical and Biological Separations program supports work by Professors Teresa J. Bandosz and Keith E. Gubbins at CUNY City College and North Carolina State University, respectively, to investigate and design novel reactive adsorbents for the removal of toxic gases. Growing concerns about the environment and terrorist attacks prompt a search for effective adsorbents for removal of small molecule toxic gases, such as ammonia, hydrogen sulfide, sulfur dioxide, and carbon monoxide. These are usually to be removed under ambient conditions in the presence of moisture, conditions where physical adsorption forces are weak. In the research program proposed here we will use a combined experimental and theoretical approach to explore toxic gas removal using reactive adsorption, by designing graphite oxide materials with functional surface groups that are optimal for removal of these gases. The experimental work will be carried out at CUNY City College, and the theoretical program at North Carolina State University. We seek to determine the fundamental mechanism, at the atomic and electronic levels, of reactive adsorption/intercalation of small molecule toxic gases on these materials. The graphite oxides will be synthesized and modified to achieve suitable microporosity and reactive/catalytic surface properties. The fundamental theoretical studies will guide the synthesis of materials with appropriate pore structures and surface functionalilties. In return, the experimental findings will suggest new directions of enquiry for the theoretical studies. Studies will be made both in the absence and presence of water, thus mimicking practical conditions in industry.This will be the first concerted combined experimental and theoretical investigation of these systems. The research is expected to lead to improved functionalized adsorbents, which may find application in other scientific challenges where the separation of reactive molecules is involved. In addition to developing experimental and theoretical algorithms to design effective adsorbents, the results may find wide applications in air cleaning, energy storage, and fuel cell technology. The materials developed may also find application as gas sensors. Changes in electrical conductivity due to the presence of such small molecules intercalated within the graphite interlayer space can be used to detect toxic gases at low concentrations.Two graduate students (one at CCNY and one at NCSU) and one undergraduate student (CCNY) will work on the project. Since CCNY is a minority serving institution there is a high probability that students from underrepresented groups will be involved in the research, which will have a positive effect on development of environmental awareness in the minority group. Other important educational aspects are the development of new environmental chemistry experiments by the undergraduate student involved in the research (independent research undergraduate project), and the development of new theoretical methods for the surface characterization of functionalized materials and for reaction with diffusion in nano-structured materials.

CBET-0754979Gubbins 这项由化学和生物分离项目颁发的 NSF 奖项支持分别来自纽约市立大学和北卡罗来纳州立大学的 Teresa J. Bandosz 和 Keith E. Gubbins 教授的工作，以研究和设计用于去除有毒气体的新型反应吸附剂。 对环境和恐怖袭击的日益关注促使人们寻找有效的吸附剂来去除小分子有毒气体，例如氨、硫化氢、二氧化硫和一氧化碳。这些通常要在存在湿气的环境条件下、物理吸附力较弱的条件下去除。在此提出的研究计划中，我们将采用实验和理论相结合的方法，通过设计具有最适合去除这些气体的功能表面基团的氧化石墨材料，探索利用反应吸附去除有毒气体。 实验工作将在纽约市立大学城市学院进行，理论项目将在北卡罗来纳州立大学进行。 我们寻求在原子和电子水平上确定小分子有毒气体在这些材料上反应吸附/嵌入的基本机制。石墨氧化物将被合成和改性以获得合适的微孔率和反应/催化表面特性。基础理论研究将指导具有适当孔结构和表面功能的材料的合成。 作为回报，实验结果将为理论研究提出新的探究方向。 研究将在无水和有水的情况下进行，从而模拟工业中的实际条件。这将是对这些系统的首次协调一致的实验和理论研究。 该研究预计将改进功能化吸附剂，这可能会应用于涉及反应分子分离的其他科学挑战。除了开发实验和理论算法来设计有效的吸附剂外，研究结果还可能在空气净化、能源存储和燃料电池技术中得到广泛应用。开发的材料还可以用作气体传感器。由于石墨夹层空间中存在此类小分子，导致电导率发生变化，可用于检测低浓度的有毒气体。两名研究生（一名在 CCNY，一名在 NCSU）和一名本科生（CCNY）将参与该项目。由于CCNY是一个少数族裔服务机构，来自弱势群体的学生很有可能参与研究，这将对少数族裔环境意识的发展产生积极影响。其他重要的教育方面是参与研究的本科生（独立研究本科项目）开发新的环境化学实验，以及开发功能化材料表面表征和纳米结构材料扩散反应的新理论方法。