The Extension of a Scientific Model of Catalyst Impregnation

催化剂浸渍科学模型的扩展

• 批准号: 9908181
• 负责人: John Regalbuto
• 金额: $ 29.9万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-12-15 至 2002-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9908181&HistoricalAwards=false
• 关键词: Extension; Scientific; Model; Catalyst; Impregnation

The objective of this project is to study the impregnation of metal complexes on high surface-area supports. Modeling and experimental studies on the adsorption of selected metal complexes on several supports will be carried out. In previous work the Revised Physical Adsorption (RPA) model was successfully applied to hexachloroplatinate on alumina. In this project the generality of the model to other types of metal complexes and other common oxide supports will be tested. A series of metals and supports will be tested to isolate the effects of pertinent parameters such as the oxide point of zero charge and the dielectric constant. The model will be tested for its applicability to catalysis. Although a model of the adsorption step is useful, it must be determined to what degree the initial deposition of metal is maintained as a function of drying and catalyst pretreatment. Predictions from the model indicate that platinum complexes are deposited as a monolayer on the oxide surface. The extent to which platinum particles agglomerate or migrate as the hydration sheaths and ligands are removed by chemical and thermal treatments will be quantified. This work is potentially applicable to catalysis and the removal of heavy metals from water streams.

本项目的目标是研究金属配合物在高表面积载体上的浸渍。 将对选定的金属络合物在几种载体上的吸附进行建模和实验研究。 在以前的工作中，修订的物理吸附（RPA）模型被成功地应用到六氯铂酸在氧化铝。 在本项目中，将测试该模型对其他类型的金属络合物和其他常见氧化物载体的通用性。 将对一系列金属和载体进行测试，以隔离相关参数的影响，例如零电荷氧化点和介电常数。 该模型将测试其适用性催化。 虽然吸附步骤的模型是有用的，但必须确定金属的初始沉积在多大程度上保持为干燥和催化剂预处理的函数。 从该模型的预测表明，铂络合物作为单层沉积在氧化物表面上。 将量化铂颗粒在通过化学和热处理去除水合鞘和配体时聚集或迁移的程度。 这项工作是潜在的适用于催化和去除重金属的水流。