Investigation of copper oxide impregnants prepared from various precursors for respirator carbons

The investigation of copper-based impregnated activated carbons prepared from water-soluble materials for broad spectrum respirator applications

“…We have shown a relationship between increasing impregnant grain size and decreasing SRR in previous work [20]. To determine the effect that impregnant distribution had on IAC samples W1, W2 and N1, dynamic flow testing was performed using SO 2 , NH 3 and HCN challenge gases.…”

Removal of chlorine gas by an amine functionalized metal–organic framework via electrophilic aromatic substitution

“…Current gas mask technologies typically use an activated carbon impregnated with metal salts, acids, and amines for the filtration of a broad range of toxic chemicals. 2,3 One shortcoming of impregnated, activated carbons is that over time the various impregnants have a tendency to react with one another, rendering them ineffective against the chemical threats for which they were designed to protect. 4 Thus, nanomaterials with bound functional groups are ideal for the removal of chemical threats avoiding deleterious effects.…”

The effect of co-impregnated acids on the performance of Zn-based broad spectrum respirator carbons

“…HNO 3 treatments have been shown to improve adsorption and distribution of metals on AC substrates [12,17,18,21]. In previous work, our group has demonstrated that well distributed, small grain size impregnant has optimal gas adsorption capacity [6,7,12,21,32]. Fig.…”

“…The flow test results for IACs containing Zn 2+ impregnant are reported in terms of breakthrough time of the challenge gas. All the metal containing samples had approximately the same loading of Zn 2+ impregnant so the breakthrough time is proportional to the relative stoichiometric ratio of reaction [7,21,32]. Table 1.…”