Analysis of Acid Catalyzed Reaction using Isotopic Transient Kinetics

使用同位素瞬态动力学分析酸催化反应

• 批准号: 9988412
• 负责人: James Goodwin, Jr.
• 金额: $ 17.5万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988412&HistoricalAwards=false
• 关键词: Analysis; Acid; Catalyzed; Reaction; using

AbstractProposal Title: Analysis of Acid Catalyzed Reactions Using Isotopic Transient KineticsProposal Number: CTS-9988412Principal Investigator: James GoodwinInstitution: University of PittsburghThe objective of this project is to use isotopic transient kinetic analysis (ITKA) to obtain in situ information on kinetic parameters for solid acid catalysts. The work will focus on determining the nature of the high activity and selectivity of sulfated zirconia (SZ) catalysts for butane isomerization, a model reaction. Parameters studied will include average residence time and concentration of active surface intermediates leading to iso-butane during n-butane isomerization on SZ and persulfated zirconia catalysts. Analytical techniques such as XPS, FTIR, NMR, and microcalorimetry will complement ITKA studies. An overall goal of this work is to understand the nature of active sites such that the sites on future catalysts might be more precisely tailored. Several specific questions need to be answered about SZ catalysts before more rational design can proceed. It is unclear why persulfated zirconia, containing a lower concentration of sulfate, gives higher activity for n-butane isomerization. It is also unclear why alumina-promoted catalysts promote coke formation but also have better catalyst stability. A successful solid-acid catalyst would replace liquid-acid catalysts, which lead to corrosion, catalyst separation, and environmental problems from acid recycle and disposal.

摘要提案标题：使用同位素瞬态动力学分析酸催化反应提案编号：CTS-9988412主要研究员：James Goodwin机构：匹兹堡大学该项目的目标是使用同位素瞬态动力学分析（ITKA）获得固体酸催化剂动力学参数的原位信息。 这项工作将重点确定硫酸化氧化锆（SZ）催化剂在丁烷异构化（一种模型反应）中的高活性和选择性的性质。 研究的参数包括在 SZ 和过硫酸氧化锆催化剂上正丁烷异构化过程中产生异丁烷的活性表面中间体的平均停留时间和浓度。 XPS、FTIR、NMR 和微量热法等分析技术将补充 ITKA 研究。 这项工作的总体目标是了解活性位点的性质，以便可以更精确地定制未来催化剂上的位点。 在进行更合理的设计之前，需要回答有关 SZ 催化剂的几个具体问题。 目前还不清楚为什么含有较低浓度硫酸盐的过硫酸氧化锆具有较高的正丁烷异构化活性。 还不清楚为什么氧化铝促进的催化剂促进焦炭形成但也具有更好的催化剂稳定性。 成功的固体酸催化剂将取代液体酸催化剂，液体酸催化剂会导致腐蚀、催化剂分离以及酸回收和处置带来的环境问题。