Kinetics Models for Supercritical Water Oxidation Processes

超临界水氧化过程的动力学模型

• 批准号: 9521698
• 负责人: Phillip Savage
• 金额: $ 30.94万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521698&HistoricalAwards=false
• 关键词: Kinetics; Models; Supercritical; Water; Oxidation

Hazardous organic compounds present in aqueous waste streams can be rapidly and safely converted to CO2 and H2O through homogeneous oxidation reactions. When the reaction conditions exceed both the critical pressure and critical temperature of water, this oxidative treatment process is referred to as supercritical water oxidation (SCWO). SCWO is promising new technology for waste destruction, and it is attracting increasing attention for possible applications such as water purification as part of a life-support system for manned space missions, and the destruction of military hazardous waste, mixed wastes, and wastes from the chemical, petroleum, and pulp and paper industries. The design, optimization, and control of an SCWO process requires knowledge of the governing reaction kinetics. The PIs will conduct parallel experimental and modeling studies to determine these governing kinetics. One part of the work involves developing phenomenological reaction models for the SCWO of real pollutants. They will determine global rate laws for reactant disappearance, CO2 prod uction, and byproduct formation and destruction by correlating the large sets of experimental data. They also plan to develop a mechanism-based reaction model for SCWO chemistry and perform the experiments necessary to validate the model, which will be based on individual elementary reaction steps and their associated kinetics. They plan to develop reliable mechanism-based models for the oxidation of increasingly complex organic compounds individually and as mixtures by these techniques.

通过均相氧化反应，含水废物流中存在的有害有机化合物可以快速、安全地转化为CO2和H2O。 当反应条件超过水的临界压力和临界温度时，这种氧化处理过程被称为超临界水氧化（SCWO）。 超临界水氧化是一种很有前途的废物销毁新技术，其可能的应用日益引起人们的注意，例如作为载人航天飞行生命支持系统一部分的水净化，以及销毁军事危险废物、混合废物以及化学、石油、纸浆和造纸工业的废物。 超临界水氧化工艺的设计、优化和控制需要掌握控制反应动力学的知识。 PI将进行平行的实验和建模研究，以确定这些控制动力学。 工作的一部分涉及发展的现象学反应模型的超临界真实的污染物。 他们将通过关联大量的实验数据来确定反应物消失、CO2产生以及副产物形成和破坏的全球速率定律。 他们还计划为超临界水氧化化学开发一个基于机理的反应模型，并进行必要的实验来验证该模型，该模型将基于单个基元反应步骤及其相关动力学。 他们计划开发可靠的基于机制的模型，用于通过这些技术单独氧化日益复杂的有机化合物和混合物。