Microwave and Sorption of VOCs on Oxide Catalysts

本研究项目的目的是研究微波辐射在氧化物吸附剂/催化剂的吸附/脱附过程中的应用。 过去的研究表明，微波处理制备的催化剂可能与其他方法制备的催化剂不同。 其他研究表明，微波辐射可以通过几种方式影响催化选择性：通过加热催化剂，通过激发反应物，或通过在表面上产生诱导反应的等离子体。PI将研究氧化物吸附剂，包括用于去除烃类的沸石（有和没有杂原子，例如，氯）在水蒸气存在下从空气中除去。 这些研究的应用是从受控环境和工艺废水中去除挥发性有机碳（VOC）。 研究了微波辐射对吸附选择性和解吸效率的影响。 将测量微波能量存在下的吸附等温线，以估计微波辐射的“有效”表面温度。 原位红外将被开发来测量温度，并遵循在暴露于微波能量的吸附和表面物种的变化。 具有可变氢氧化物含量的沸石吸附剂，即，从dydrophobic到drophilic也将受到关注。 在本研究的后面部分，将改变poware递送以确定这些过程与吸附剂和吸着剂系统的微波吸收光谱相比的效率。 该研究涵盖了山梨酸酯-山梨酸酯的基本微波光谱学，在微波能量存在下的吸附解吸研究，以及微波反应研究，并涉及三个部门之间的合作。

The purpose of this research project is to study the use of microwave radiation in the adsorption/desorption process over oxide sorbents/.catalysts. Past studies have shown that catalysts prepared with microwave treatment can differ from those prepared by other methods. Other studies suggest that microwave radiation can influence catalytic selectivity in several ways: by heating the catalyst, by exciting the reactants, or by creating a plasma that induces reaction on a surface.The PI will study oxide sorbents including zeolites for removal of hydrocarbons (with and without heteroatoms, e.g., chlorine) from air in the presence of water vapor. The application of these studies is the removal of volatile organic carbons (VOCs) from controlled environments and process effluents. The influence of microwave irradiation on the selectivity of adsorption, and the efficiency of desorption will be studies. Sorption isotherms in the presence of microwave energy will be measured to estimate the "effective" surface temperature with microwave radiation. In situ infrared will be developed to measure the temperature and to follow the changes in the sorbed and surface species during exposure to microwave energy. Zeolite sorbents with variable hydroxide contents, i.e., from dydrophobic to hydrophillic will also be looked at. The powere delivery will be varied to determine the efficiencies of these processes compared to the microwave absorption spectra of the sorbent and sorbate systems in later parts of this research. The research spans fundamental microwave spectroscopy of the sorbent-sorbate to ad-desorption studies in the presence of microwave energy to microwave reaction studies and involves the collaboration between three departments.