Gas Adsorption Properties
of the Ternary ZnO/CuO/CuCl<sub>2</sub> Impregnated Activated Carbon
System for Multigas Respirator
Applications Assessed through Combinatorial Methods and Dynamic Adsorption
Studies
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Abstract
A ternary library of 64 ZnO/CuO/CuCl<sub>2</sub> 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<sub>2</sub> and NH<sub>3</sub> adsorption were prepared in bulk using
the incipient wetness method and were evaluated for multigas respirator
function by dynamic adsorption studies of SO<sub>2</sub>, NH<sub>3</sub>, HCN, and C<sub>6</sub>H<sub>12</sub> 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<sub>2</sub>Cl(OH)<sub>3</sub> was identified to be a potential
multigas adsorbent
