Adsorption characteristics of dichloromethane-ethyl acetate/toluene vapor on a hypercrosslinked polystyrene adsorbent.

Dichloromethane (DCM), a typical representative of chlorinated volatile organic compounds (CVOCs), is usually exhausted along with other volatile organic compounds (VOCs), such as toluene and ethyl acetate, in industrial factories. To address the complexity of the components, the large variation in concentration of each component and the water content of the exhaust gases emitted from the pharmaceutical and chemical industries, the adsorption characteristics of DCM, toluene (MB), and ethyl acetate (EAC) vapors on hypercrosslinked polymeric resins (NDA-88) were studied by dynamic adsorption experiments. Furthermore, the adsorption characteristics of NDA-88 for binary vapor systems of DCM-MB and DCM-EAC at different concentration ratios and the nature of the interaction force with the three VOCs were explored.

Simultaneous removal of NO and dichloromethane (CHCl) over Nb-loaded cerium nanotubes catalyst.

Herein, a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with different loading amount of NbO (0-10 wt.%) were prepared and used for selective catalytic reduction of NO with NH (NH-SCR) in the presence of CHCl. Commercial VO-WO-TiO catalyst was also prepared for comparison.

Effect of Cr doping in promoting the catalytic oxidation of dichloromethane (CHCl) over Cr-Co@Z catalysts.

A core-shell catalyst which consists of a CoO core and ZSM-5 shell, was prepared by microwave hydrothermal method and subjected for dichloromethane (DCM) oxidation. Chromium, cerium, niobium, and manganese species were separately introduced into the core-shell catalyst using the wet precipitation method and denoted as M-Co@Z (M = Cr, Ce, Nb, Mn). The catalytic activity of the Cr-Co@Z catalyst was significantly increased due to the interaction between CrO and CoO.