Polymer‐based Spherical Activated Carbons – From Adsorptive Properties to Filter Performance

Abstract

Polymer-based spherical activated carbon (PBSAC), produced by means of carbonization and subsequent activation of a polymeric precursor in a batch process represent adsorbents with adjustable pore size distribution and adsorption characteristics. This flexibility results from batch operation and from the possibility to combine different activation media, therefore controlling the mechanisms of pore generation. The geometry and the mechanical properties of PBSAC allow for structuring of filter media e.g., for adsorbent enlargement or fixation. Other intrinsic product properties such as roundness, high crush strength and high abrasion resistance of PBSAC offer advantages in various adsorption applications.

On the structural, textural and morphological features of Fe-based catalysts supported on polystyrene mesoporous carbon for Fischer–Tropsch synthesis

“…Raman spectrum of FeSi was typical of -Fe 2 O 3 [32,44] with modes at around 188, 460 and 509 cm −1 together with a sharp mode at 675 cm -1 . Similar features were observed between both types of catalyst; however, the intensity of the modes was higher in the Fe-PMC catalyst than in FeSi.…”

“…[46]. Spinel oxides (e.g., AB 2 O 4 ) are known for having each metal ion in the octahedral site, which is surrounded by six tetrahedral sites connected by oxygen anion [32,[47][48].…”

“…The second support -PMC2 -was produced by controlled oxidation of PMC1 in air at 743 K. A functionalized surface containing hydroxyl, ether and carboxyl groups is formed during this step. Further details on the production of the PMC1 and PMC2 supports can be found elsewhere [32].…”

“…The latter iron oxide has a spinel structure and goes to maghetite phase (e.g., an inverse spinel structure, namely [Fe 3+ ] tetra [Fe 2+ ] octa O 4 ) through oxidation of its Fe 2+ ions [32,48]. Magnetite is also obtained by reduction of -Fe 2 O 3 with CO originated from the partial carbon oxidation during the iron salt decomposition through calcinations [49].…”

Development of Solubility Selective Mixed Matrix Membranes for Gas Separation

“…The AC is based on a polymeric precursor that offers a clean carbon with very specific and reproducible pore structure in contrast to carbons made of natural products [21]. ACs with different pore structures were used as filler particles in preliminary tests.…”