New Sorbents for Separation and Purification by Weak Chemical Bonds

这笔赠款是通过化学和运输系统司界面、运输和分离计划的分离和净化计划子要素授予的。首席研究员是密歇根大学的拉尔夫·杨博士。建议的研究涉及三种基本类型的分离问题的新型吸附剂的研究。特别强调了涉及烯烃体系的那些。在这些体系中分离的基础被认为很大程度上是由于烯烃物种和吸附剂之间的优先pi键，而低分子链烷烃物种不存在这种键。PI的研究建议继续制备用于这些分离的银和铜基吸附剂。此外，PI正在建议研究使用负载在硅石载体上的银盐来吸附二恶英，以及从热燃烧气体中吸附NO。这些区域中的每一个都描述了实验工作。此外，计划进行初始分子轨道计算，以试图更详细地了解阳离子-山梨酸盐结合步骤，这是每个体系中吸附机理的重要部分。

This grant is awarded through the Separations and Purification program sub-element of the Interfacial,Transport and Separations program of the Chemical and Transport Systems Division. The principal investigator is Dr. Ralph Yang at the University of Michigan. The proposed research concerns the study of novel adsorbents for three basic types of separations problems. In particular, emphasis is given to those involving olefeneparaffin systems. The basic for the separation in these systems is thought to be largely due to the preferential pi-bonding between the olefenic species and the adsorbent, which is not present with a low molecularweight paraffin species. The PI's research proposes to continue with the preparation of both silver and copper-based sorbents for these separations. In addition, the PI is proposing the study of both dioxin adsorption, using silver salts supported on silcia supports, and NO adsorption from hot combustion gases. Experimental work is described in each of these ares. Futhermore, an initio molcularorbital calculations are planned in an attempt to provide a more detailed understanding of the catiion-sorbate binding step that is an essential part of the adsorption mechanism in each of these systems.