Gas Adsorption Properties of the Ternary ZnO/CuO/CuCl₂ Impregnated Activated Carbon System for Multigas Respirator Applications Assessed through Combinatorial Methods and Dynamic Adsorption Studies

Abstract

A ternary library of 64 ZnO/CuO/CuCl(2) impregnated activated carbon samples was synthesized and screened automatically using a combinatorial (combi) method. The ability of the samples to adsorb toxic gases was screened gravimetrically. The stoichiometric ratio of reaction (SRR) between the moles of toxicant and the total moles of impregnant was obtained from the calculated mass increase of the samples after chemisorption, with a high SRR indicating high efficiency of toxicant removal. The combi samples that exhibited good dry SO(2) and NH(3) adsorption were prepared in bulk using the incipient wetness method and were evaluated for multigas respirator function by dynamic adsorption studies of SO(2), NH(3), HCN, and C(6)H(12) gases in either dry or humid conditions at ambient temperature. The bulk samples showed equivalent gas adsorption capacities when exposed to the different challenge gases indicating the value of the combi method for initial screening. Cu(2)Cl(OH)(3) was identified to be a potential multigas adsorbent.

Kinetics and Mechanism of Bioactivation via S-Oxygenation of Anti-Tubercular Agent Ethionamide by Peracetic Acid

“…This peak is attributable to the dimeric sulfur monoxide species, H 2 S 2 O 2 (aq). Sulfur monoxide, SO, and its dimer, S 2 O 2 , have been observed in low temperatures in the gas phase. , Sulfur monoxide has also been formed and detected in the activation of frustrated Lewis pair of N-sulfinyamine . Thus, mechanistically, the oxidation of the S-oxide is accompanied by the formation sulfur monoxide and the product amide (Scheme ).…”

Adsorption and Decomposition of Sarin on Dry and Wet Cu2O(111) and CuO(111) Surfaces: Insight from First-Principles Calculations

“…In hunting for efficient decontamination strategies for NAs, the heterogeneous catalysis has received considerable attention. − Metal oxides have high activity and high temperature resistance, and they have been widely used as decontamination materials . The most commonly used ASZM-TEDA in commercial and military protective materials is composed of metal oxides as its important components, and the gas mask filter containing ASZM-TEDA can provide temporary broad-spectrum protection against various toxic substances. Adsorption and decomposition of G-type nerve agents on the metal oxides, such as ZnO, MgO, Al 2 O 3 , TiO 2 , etc., have been investigated by DFT calculations, suggesting that these metal oxides can be effectively used to adsorb and further decompose these toxic OPs, − although related experimental characterization on their activity toward NAs and their simulants is lacking.…”

Swellable functional hypercrosslinked polymer networks for the uptake of chemical warfare agents

“…7,8 The lethal toxicity of CWAs means research into decontamination methods often takes place with simulants rather than the real agents. 9,10 Porous materials such as activated carbons 9,11,12 and metal-organic frameworks (MOFs) [13][14][15][16][17][18] have been shown to be effective in the chemical decomposition of CWAs. MOFs tend to exhibit faster breakdown kinetics compared with activated carbons due to the tunability of their functionality and structure, and higher sorption capacities.…”