Al2O3-Cact-(CuO, Cr2O3, Co3O4) Adsorbents-Catalysts: Preparation and Characterization
Al 2 O 3 -C act -(CuO, Cr 2 O 3 Co 3 O 4 ) adsorbents-catalysts were prepared using Al 2 O 3 -C act (alumina gel-activated carbon) adsorbent and different amount of CuO, Cr 2 O 3 and Co 3 O 4 . The active components were incorporated into wet alumina gel-carbon mixture using different conditions (by sol-gel method and mixing a milled metal oxides). Equilibrium adsorptive capacity measurements of alcohol vapours were carried out in order to determine the influence of preparation conditions on
... on conditions on the stability of prepared adsorbents-catalysts. Specific surface area of the prepared adsorbents-catalysts were measured by BET method. It was established that for adsorbent-catalyst produced by sol-gel method S BET = 244.7 m 2 /g. Surface area S BET = 29.32 m 2 /g was obtained for adsorbent-catalyst with metal oxides. On the basis of these results it was assumed that active carbon was lost in this adsorbent-catalyst during the preparation process. Sol-gel derived adsorbent-catalyst was tested for the oxidation of methanol vapours. Catalytic oxidation was carried out in fixed-bed reactor. Experimental data indicate that adsorptive capacity of the adsorbent-catalyst is (3.232 -3.259) mg/m 3 CH 3 OH at relative air humidity is 40 % -50 %. During a fast heating of CH 3 OH -saturated adsorbent-catalyst a part of adsorbate is converted to CO 2 and H 2 O. Methanol conversion increases with increasing of adsorbent-catalyst heating rate.