Evolution of Ammonia from Type ASC Whetlerite

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

“…The need to find new multigas adsorbents arises from new regulations governing the use of filtration devices and the elimination of chromium in the formulation of multigas filtration masks. Examples of multigas IACs that have replaced the toxic chromium with hexavalent tungsten or molybdenum have been reported in the literature. , These types of IACs offer some improvements over chromium containing materials, however some health related issues remain …”

“…1,6 These types of IACs offer some improvements over chromium containing materials, however some health related issues remain. 8 The gas adsorption process is dependent on several factors including the physical and chemical surface characteristics of the base carbon and the reactivity, as well as the composition of impregnants used in the formulation of the adsorbent material. It is also necessary to determine that the addition of reactive species onto the base carbon does not compromise its ability to physically adsorb toxicants nor produce undesirable byproduct.…”