SBIR Phase II: Catalytic Oxidation of Chlorofluorocarbons and Related Compounds for Pollution Abatement Applications

9531289这个小企业创新研究第二阶段项目涉及开发一种整体氧化催化剂，以控制氟氯化碳（氯氟化碳）和相关化合物向环境中的释放。氯氟烃和相关化合物的释放被认为对地球臭氧层的下降起着重要作用。旨在取代氟氯化碳的化合物，包括氢氟碳化物（氢氟碳化物）和氢氟碳化物（氢氯氟烃），也具有消耗臭氧的特性。因此，必须控制这些化合物的释放。催化氧化是一种非常适合控制气相排放的技术。然而，由于催化剂在恶劣的酸性气体环境中降解，能够氧化cfc及相关化合物的催化剂迅速失活。在第一阶段的努力下，研究了使用Pt/m-ZrO2催化剂的可行性。该催化剂具有高活性，能够在不失活的情况下连续运行100小时以上，破坏1000ppm的R22、R113和R134a。第二阶段提案的目标是首先修改催化剂配方，以最大限度地提高催化剂的反应性和耐久性，然后将催化剂合并到整体的涂层中，并评估所述材料的反应性和耐久性。为了达到这些目标，将系统地改变催化剂的关键物理性质，并对选定的材料进行反应性和稳定性评估。优化后，将制备整体式催化剂，并在广泛的工艺条件下对选定的CFCs、hfc和HCFCs进行反应性和耐久性评估。根据第一阶段所取得的成果，预计单片催化剂将具有足够的反应性和耐久性，可用于商业污染减排应用。目前还没有能够经济地控制氟氯化碳及相关化合物释放的技术。如果在第二阶段开发的新型催化剂取得成功，可以围绕催化剂设计经济的污染减排系统，以满足各种应用的需要，包括控制工厂逸散性排放和烟雾减排。

9531289 This Small Business Innovation Research Phase II project involves the development of a monolithic oxidation catalyst to control the release of CFCs (cholorofluorocarbons) and related compounds into the environment. The release of CFCs and related compounds is believed to play a significant role in the decline in the earth's ozone layer. Compounds intended to replace CFCs, which include HFCs (hydrofluorocarbons) and HCFCs (hydrochlorofluorocarbons) also possess ozone-depleting properties. As a result, the release of these compounds must be controlled. Catalytic oxidation is a technology well suited for controlling vapor phase emissions. However, catalysts capable of oxidizing CFCs and related compounds have rapidly deactivated due to degradation of the catalyst in the harsh acid gas environment. Under the Phase I effort, the feasibility of using a Pt/m-ZrO2 catalyst was investigated. The catalyst was highly reactive and was able to destroy 1,000 ppm of R22, R113 and R134a without deactivation for over 100 hours of continuous operation. The objectives of the Phase II proposal are to first modify the catalyst formulation in an effort to maximize the reactivity and durability of the catalyst, then incorporate the catalyst into the washcoat of a monolith and evaluate the reactivity and durability of said material. To meet these objectives, key physical properties of the catalyst will be systematically varied, with selected materials being evaluated for reactivity and stability. Once optimized, monolithic catalysts will be prepared and evaluated for reactivity and durability against selected CFCs, HFCs and HCFCs over a wide range of process conditions. Based on results obtained during the Phase I effort, it is anticipated that the monolithic catalyst will possess sufficient reactivity and durability to be employed in commercial pollution abatement applications. Technologies capable of economically controlling the release of CFCs and related compounds are currently unavailable. Should the n ovel catalyst developed in this Phase II effort prove successful, economic pollution abatement systems may be designed around the catalyst to meet the needs of a wide variety of applications which include controlling plant fugitive emissions and fume abatement.