Controlling olefin selectivity in electrocatalytically-assisted alkane dehydrogenation

控制电催化辅助烷烃脱氢中的烯烃选择性

• 批准号: 1213443
• 负责人: Umit Ozkan
• 金额: $ 45万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1213443&HistoricalAwards=false
• 关键词: Controlling; olefin; selectivity; electrocatalytically; assisted

With this award from the Chemical Catalysis Program, Prof. Umit S. Ozkan from the Ohio State Uinversity and co-PI Anne Co will investigate, in an interdisciplinary setting, the factors that control olefin selectivity from the electrocatalytically-assisted dehydrogenation of lower alkanes. The primary challenge in alkane dehydrogenation is selectivity control. The proposed research will combine two different strategies to tackle this problem. (1) Using an electrocatalytic reactor scheme will prevent hydrocarbons and oxygen coming in contact in the gas phase, hence limiting further oxidation of olefin molecules. At the same time, voltage control will provide a steady-flux of oxide ions to the anode, lifting the thermodynamic limitation, which governs non-oxidative dehydration reactions. Also, controlling the transfer of oxide ions to the anode surface could limit any carbonaceous species depositing on the surface in the form of coke. (2) By focusing on the surface properties of the anode electrocatalysts, it will be possible to tailor its activity to promote alkane activation, but inhibit C-C bond cleavage and complete oxidation of olefins. Understanding the structure/function relationship will guide this tailoring. To achieve this goal, the co-PIs will combine their expertise from two different fields, namely heterogeneous catalysis and electrochemistry. The interface of these areas will provide a unique approach to tackle the problems inherent in alkane dehydrogenation. The work plan will combine materials synthesis, detailed characterization and electrocatalytic activity measurements in an iterative process.Alkane activation and dehydrogenation are reactions of great importance to the chemical industry. Selective conversion of alkanes to olefins may have significant economic impact. The fundamental understanding which will be acquired in this study can be extended to other catalytic oxidation reactions such as production of aldehydes, ketones and alcohols from lower alkanes. Many of the results from this project will be used to enhance the contents of a new course on electrochemistry, developed by the co-PI. The PI has well-established partnerships with two local high schools to provide research internship experience to senior high school students. One of the schools, Columbus School for Girls, is a college preparatory school dedicated to girls' intellectual and social growth from infancy to the twelfth grade. Other programs that focus on human resource development will include College of Engineering Summer Orientation for Female Engineering Freshmen and "Energy and Environment Day" for ninth grade girls as part of a "CheME & YOU @OSU" summer camp at Ohio. Both PI and co-PI have an existing track record of involving undergraduate students in hands on research, leading to co-authorship in research publications.

凭借化学催化计划的这一奖项，俄亥俄州立大学的 Umit S. Ozkan 教授和联合首席研究员 Anne Co 将在跨学科环境中研究控制低级烷烃电催化辅助脱氢中烯烃选择性的因素。烷烃脱氢的主要挑战是选择性控制。拟议的研究将结合两种不同的策略来解决这个问题。 (1) 使用电催化反应器方案将防止碳氢化合物和氧气在气相中接触，从而限制烯烃分子的进一步氧化。同时，电压控制将为阳极提供稳定的氧离子通量，从而解除控制非氧化脱水反应的热力学限制。此外，控制氧化物离子向阳极表面的转移可以限制任何碳质物质以焦炭的形式沉积在表面上。 (2)通过关注阳极电催化剂的表面性质，可以调整其活性以促进烷烃活化，但抑制C-C键断裂和烯烃的完全氧化。了解结构/功能关系将指导这种剪裁。为了实现这一目标，共同首席研究员将结合他们来自两个不同领域的专业知识，即多相催化和电化学。这些领域的结合将提供一种独特的方法来解决烷烃脱氢中固有的问题。该工作计划将在迭代过程中结合材料合成、详细表征和电催化活性测量。烷烃活化和脱氢是对化学工业非常重要的反应。烷烃选择性转化为烯烃可能具有显着的经济影响。本研究中获得的基本理解可以扩展到其他催化氧化反应，例如从低级烷烃生产醛、酮和醇。该项目的许多成果将用于增强共同首席研究员开发的电化学新课程的内容。 PI与当地两所高中建立了良好的合作伙伴关系，为高中生提供研究实习经验。其中一所学校是哥伦布女子学校，是一所大学预科学校，致力于女童从婴儿期到十二年级的智力和社会发展。其他专注于人力资源开发的项目包括工程学院针对女性工程新生的夏季迎新活动，以及针对九年级女生的“能源与环境日”活动，作为俄亥俄州“CheME & YOU @OSU”夏令营的一部分。 PI 和 co-PI 都有让本科生参与研究的现有记录，从而导致研究出版物的共同作者。