Al2O3-Cact-(CuO, Cr2O3, Co3O4) Adsorbents-Catalysts: Preparation and Characterization

2013 Medžiagotyra  
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
more » ... 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.
doi:10.5755/ fatcat:i2g6jkpbn5dl3nblf45bh53zoa