Catalytic Combustion of Waste Halogenated Solvents

一种新的制备方法已适用于催化剂， 稀释空气流中卤素的氧化。 该过程产生 不锈钢高活性氧化/还原催化剂 屏蔽，其抵抗反应器产物HCl的侵蚀， 并且表现出良好的稳定性和选择性。 机械的见解 转化为制备变量，初级反应动力学， 将开发潜在的去激活限制。 新 应阐明催化剂活性和 电子探针显示表面形态发生明显变化， 显微镜模式。 氯化碳氢化合物（CHCs）是一种严重的健康风险， 存在于地下水或空气中。 焚烧可用于 将它们转化为HCl，然后可以在洗涤中中和 操作 这种技术有两个困难： 要求添加大量的辅助燃料，如果 废物流具有足够低的热值， 产生不完全燃烧的不良产物。 催化 氧化提供了从CHC到HCl加CO2的替代途径， 是理想的稀烃混合物提供的催化剂 保持活化温度，避免中毒。 研究 我们将集中讨论最后两个要求。 温度 将通过欧姆加热保持催化剂的活性， 中毒将通过明智地选择活性物质来避免。 催化剂

A novel preparation method has been adapted to a catalyst for oxidation of halogens in dilute air streams. This procedure produces a highly active oxidation/reduction catalyst from stainless steel screen, which is resistant to the attack by the reactor product, HCl, and exhibits good stability and selectivity. Mechanistic insights into the preparation variables, primary reaction kinetics, and potential deactivation limitations will be developed. New relationships should be elucidated between catalyst activity and surface morphology changes evident in electron microprobe and microscope patterns. Chlorinated hydrocarbons (CHCs) represent a serious health risk if present in groundwater or the air. Incineration can be used to convert them to HCl, which can then be neutralized in a scrubbing operation. Two difficulties are associated with this technology: the requirement of adding significant amounts of auxiliary fuel if the waste stream has a sufficiently low heating value, and the possibility of creating unsavory products of incomplete combustion. Catalytic oxidation provides an alternative route from CHC to HCl plus CO2, and is ideal for dilute hydrocarbon mixtures provided the catalyst activation temperature is maintained and poisoning can be avoided. Research will concentrate on these last two requirements. The temperature of the catalyst will be maintained by ohmic heating, and poisoning will be avoided by a judicious selection of the active catalytic agent.