To prepare granulated sorbents for absorption of the hydrochloric acid vapor, the formulations ZnO-CaO-Al(OH)3, Zn4CO3(OH)6-CaO-Al(OH)3, and MgO-CaO-Al(OH)3 with a 1: 1: 1 molar ratio of the oxides were studied. Mechanical processing of the mixtures leads to amorphization of compounds of the bivalent metals and to an increase in the size of gibbsite crystallites, accompanied by deformation of its crystal lattice. The composition of the chemisorbent has no effect on the number of basic surface centers, but determines the mechanical strength of grains and their absorbing capacity. The most promising formulation for preparing the chemisorbent is the Zn4(CO3(OH)6-CaO-Al(OH)3 system possessing the highest absorbing capacity for HCl vapor and retains its mechanical strength in tests.
Russian Journal of Applied Chemistry – Springer Journals
Published: Aug 28, 2013
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