Microwaves and Sorption of VOCs on Oxide Catalysts

TIS的研究重点是从受控大气和工艺废水中去除挥发性有机化合物(VOCs)。PIS将研究微波传统法的潜力，以增强吸附和/或帮助再生吸附固体。这项研究将确定VOCs在氧化物吸附剂上吸附和解吸过程中微波辐射的影响，具体地说，PI将研究在水蒸气存在的情况下，用于从空气中去除碳氢化合物(含和不含杂原子，例如氯)的沸石。探讨了微波辐射对VOCs的分解，微波辐射对吸附选择性和脱附效率的影响，以及对VOCs的催化分解。将使用不同氢氧化物含量的沸石吸附剂，从疏水到亲水。微波辐射的频率将在1-120 GHz之间变化，并具有可变的功率，以确定这些过程的效率，并与吸收剂和吸附体系的微波吸收光谱进行比较。将研究三种类型的过程：(1)微波存在下的竞争吸附；(2)微波诱导的解吸；(3)部分由微波辐射催化的VOCs的分解。重点是选择性地去除空气或载气中的VOCs，以及吸附有限的混合气体，包括H2O、C6H12、CHxCl4-x、CH3COCH3、NO、NH3和噻吩.将研究的吸附剂是羟基含量变化并通过反应对其羟基进行改性的ZSM-5沸石、八面沸石和L沸石。此外，催化金属(如铜和镍)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.