CAREER: Educational and Research Opportunities in Environmental Engineering: Catalysis as a Tool for Solving Environmental Problems

提案题目：环境工程的教育和研究机会：催化作为解决环境问题的工具。项目编号：CTS-9702699首席研究员：Fabio H. Ribeiro机构：伍斯特理工学院本研究将重点研究含氯氟烃化合物在钯单晶和碳负载钯及其他载体上的加氢脱氯。更好地了解这些催化反应将影响环境修复和污染预防技术。科学问题是确定脱氯和Pd失活的机制，以及结构对催化活性和选择性的影响。在可能的结构现象中，PI将研究有机化合物结构效应、金属结构敏感性、支撑效应和晶体尺寸效应。将使用的技术包括在特高压条件下（LEED， AES， XPS， TPD）进行表面结构和成分分析，在高温（500℃）和高压反应器（1.5 atm）中进行原位紫外拉曼，以及在单独的间歇反应器中进行同位素交换反应。在详细讨论载体在反应中的作用的同时，还将研究Pd在C以外的载体上的重组。教育计划包括加强WPI化学工程专业学生的环境取向。从大三到研究生阶段的项目将涉及学生学习和解决由现有环境机构法规或根据工业合作者定义的实际问题。

ABSTRACT Proposal Title: Educational and Research Opportunities in Environmental Engineering: Catalysis as a Tool for Solving Environmental Problems. Proposal Number: CTS-9702699 Principal Investigator: Fabio H. Ribeiro Institution: Worcester Polytechnic Institute This study will be focused on the hydrodechlorination of chlorofluorocarbon compounds on Pd single crystal and Pd supported on carbon and other supports. Better understanding of these catalytic reactions will impact environmental technologies of remediation as well as pollution prevention. The scientific issues are the identification of mechanisms of dechlorination and of Pd deactivation, and of the structural effects on catalytic activity and selectivity. Among the possible structural phenomena, the PI will address organic compound structure effects, metal structure sensitivity, support effects, and crystallite size effects. The techniques to be used include surface structure and composition analysis under UHV conditions (LEED, AES, XPS, TPD), in-situ ultraviolet Raman in a high-temperature (500 C) and high-pressure reactor (1.5 atm), and isotopic exchange reaction in a separate batch reactor. The restructuring of Pd on supports other than C will be studied while addressing in detail the role of the support in the reaction. The educational plan includes the strengthening of an environmental orientation for WPI chemical engineering students. Projects at the junior through graduate levels will involve students studying and solving real problems prompted by existing environmental agency regulations or defined in accordance with industrial collaborators.