Microwaves and Sorption of VOCs on Oxide Catalysts

TIS的研究重点是从受控气氛和工艺废水中去除挥发性有机化合物（VOCs）。 PI将研究微波传统的潜力，以提高吸附和/或协助吸附固体的再生。 该研究将确定微波辐射在氧化物吸附剂上吸附和解吸VOC期间的影响，特别是PI将研究用于去除烃类的沸石（有和没有杂原子，例如，Cl）在水蒸气存在下从空气中分离。 本论文将探讨微波辐射对挥发性有机化合物的分解作用、微波辐射对吸附选择性和脱附效率的影响以及挥发性有机化合物的催化分解。将使用具有从疏水到亲水的可变氢氧化物含量的沸石吸附剂。 微波辐射的频率将在1-120 GHz之间变化，功率可变，以确定这些过程与吸附剂和吸附物体系的微波吸附光谱相比的效率。将研究三种类型的过程：（1）在微波存在下的竞争吸附，（2）由微波诱导的解吸，（3）微波辐射部分催化杂原子VOCs的分解。 重点是从空气或载气中选择性去除VOCs，以及有限的气体混合物的吸附，包括H2O，C6 H12，CHxCl 4-x，CH 3COCH 3，NO，NH3和噻吩。 所研究的吸附剂将是ZSM-5沸石、八面沸石和L沸石，它们具有不同的羟基含量和通过反应对其羟基的改性。此外，催化金属（例如，Cu和Ni）将被阳离子交换到晶格中。

Tis research focuses on the removal of Volatile Organic Compounds (VOCs) from controlled atmospheres and process effluents. The PIs will study the potential of microwave tradiation to enhance the adsorption and/or to assist in the regeneration of the sorbing solids. The research will determine the effect of microwave radiation during adsortion and desorption of VOCs over oxide sorbents, specifically the PIs will look at zeolites for the removal of hydrocarbons (with and without heteroatoms, e.g., Cl) from air in the presence of water vapor. The decomposition of VOCs induced by microwave radiation, the influence of microwave irradiation on the selectivity of adsorption and the efficiency of desorption, and the catalytic decomposition of VOCs will be explored. Zeolite sorbents with variable hydroxide contents, from hydrophobic to hydrophilic, will be used. The frequency of the microwave radiation will be varied from 1-120 GHz with variable power to determine the efficiencies of these processes compared to the microwave sorption spectra of the sorbent and sorbate syste ms. Three types of processes will be studied: (1) competitive adsorption in the presence of microwaves, (2) desorption induced by microwaves, and (3) decomposition of heteroatom VOCs catalyzed in part by microwave irradiation. The focus is on the selective removal of VOCs from air or carrier gas and the sorption of limited mixtures of gases, including H2O, C6H12, CHxCl4-x, CH3COCH3, NO, NH3 and thiophene. The adsorbents to be studied will be zeolites ZSM-5, Faujisites, and L zeolite with variation in hydroxyl content and modification to their hydroxyls by reaction, and. in addition, catalytic metals (e.g., Cu and Ni) will be cation exchanged into the lattice.