Solid-Catalyzed Reactions in Supercritical Reaction Media

超临界反应介质中的固体催化反应

基本信息

批准号：
9816969
负责人：
Bala Subramaniam
金额：
$ 13.81万
依托单位：
University of Kansas Center for Research Inc
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-10-01 至 2001-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9816969&HistoricalAwards=false
关键词：
Solid Catalyzed Reactions Supercritical Reaction

项目摘要

Abstract - Subramaniam - 9816969 This research program will rationally exploit supercritical (sc) reaction media to develop new, environmentally-safer and selective processes for such important catalytic reactions as acid catalyzed 1-butene/isobutane alkylation to produce gasoline, skeletal isomerization of n-butane to isobutane and selective functional groups hydrogenations on supported catalysts. The goals include (i) the optimization of the cosolvent-based supercritical solid-acid alkylation process (recently developed in our laboratory) to obtain enhanced alkylate yields at high butene conversion; (ii) the application of the in situ sc decoking concept to extend the life of low-temperature, solid-acid skeletal isomerization catalysts; and (iii) the optimization of solid-catalyzed sc hydrogenation process by pressure-tuning solvent and transport properties in the near-critical region to achieve desired product selectivity and hydrogenation rates. Besides providing a better fundamental understanding of the physicochemical processes underlying heterogeneous fluid/solid catalysis in sc media, the catalyst systems developed in this research are likely to impact the refining and chemical industries by minimizing chemical waste while optimizing catalyst selectivity, efficiency and lifetime. Specifically, solid-acid catalyzed alkylation and isomerization processes with enhanced activity and product yields could emerge as commercially-viable, environmentally-safer alternatives to liquid-acid based processes. Continuous solid-catalyzed hydrogenation in sc media - characterized by pressure-tunable selectivities minimizing waste formation, enhanced reaction rates, and inherently safer operation due to decreased holdup of hazardous reagents in the reactor - could emerge as an attractive process for functional groups' hydrogenations, a subject critical to the fine chemicals, pharmaceutical and food industries.

摘要-Subramaniam-9816969该研究计划将合理利用超临界介质（SC）反应培养基开发新的，环保的和选择性的过程，以用于酸催化的1-二丁烯/异丁烷烷基化，以产生汽油，骨骼骨骼异构化，以产生酸催化的催化反应，丁烷到异丁烷和选择性官能团在支持的催化剂上氢化。目标包括（i）优化基于助质的超临界固体烷基化过程（最近在我们的实验室开发），以在高丁烷转化率时获得增强的烷基化产量；（ii）原位sc裂解概念的应用以延长低温，固体骨骼异构化催化剂的寿命；（iii）通过压力调节溶剂和近临界区域的运输特性来优化固体催化的SC氢化过程，以实现所需的产品选择性和氢化速率。除了对SC介质中异质液/固体催化的基本理解提供更好的基本了解外，本研究中开发的催化剂系统可能通过最大程度地减少化学废物而在优化催化剂的选择性，效率，效率和生命周期来最大程度地减少化学废物来影响炼油和化学工业。具体而言，具有增强活性和产物产量的固体酸催化烷基化和异构化过程可能会成为基于液体酸过程的商业可行，环境储备的替代品。 SC培养基中连续的固体催化氢化（以可压力可调的选择性最小化，使废物形成，增强的反应速率以及由于反应器中有害试剂的持有减少而固有的更安全的操作可能会成为功能组的氢化，氢化，固有的过程，这是一个有吸引力的过程对精细化学品，制药和食品行业至关重要的主题。