Adsorption and DSC study of mineral–carbon sorbents obtained from coal tar pitch–polymer compositions

Abstract

The purpose of this study was to determine the possibility of producing hydrophobic mesoporous mineralcarbon sorbents from aluminum hydroxide and compositions of coal tar pitch-polymers on carbonization at 600°C in a nitrogen atmosphere. Blends of the products of co-precipitation of aluminum hydroxide in the carbonaceous substances medium were subjected to carbonization process. The extent of porous structure development was evaluated using low temperature nitrogen adsorption, adsorption of benzene vapors, and adsorption of iodine from aqueous solution. The highest value of BET surface area of about 370 m 2 /g was achieved for the carbonization product obtained from co-precipitated raw components with 10 wt% compositions coal tar pitch-polymer. These materials demonstrated high capacity to reduce organic pollutions from sewage. Pitch-polymer composition containing poly(ethylene terephthalate) or phenol-formaldehyde resin was studied by the means of DSC method in order to determine the high-temperature transformations taking place under the conditions of carbonization. DSC method enables to determine i.a. the decomposition temperatures of carbonizates produced from pitch-polymer compositions and the evaluation of their sorption abilities. The additive of poly(ethylene terephthalate) and phenol-formaldehyde resin caused the increase of thermal resistance of the pitch expressed by higher decomposition temperatures.

Thermal transformation of polyacrylonitrile deposited on SBA-15 type silica

“…As a high-melting, rigid and spinnable duroplast, PAN is a very useful raw material for the preparation of microporous activated carbon and carbon fibers by controlled pyrolysis followed by an appropriate chemical and/or thermal activation [1][2][3][4]. PAN-derived activated carbons are applied as the adsorbents for the removal of heavy metal ions and organic pollutants from aqueous solutions as well as volatile organic compounds (VOCs) from exhaust gases [5][6][7].…”

Porous structure and thermal properties of carbon adsorbents from pitch–polymer compositions

“…They are aimed at the improvement of utility properties of coaloriginated bitumen and utilization of waste polymers [17][18][19][20]. It was demonstrated that pitch-polymer compositions can be used for the preparation of carbon adsorbents [21][22][23] and mineral-carbon adsorbents [24,25].…”

Thermo-rheological properties of coal-tar pitch modified with phenol-formaldehyde resin

“…Modification of coal-tar pitch with unsaturated polyester resins leads to considerable plasticization, and such modified bitumens of significantly lower cancerogenicity can be used as binders with insulating and sealing properties. The coal-tar pitch with the addition of poly (ethylene terephthalate) or polycarbonate is characterized by increased thermal and mechanical resistance [10], and it can be used as a promotor of porous materials of great specific surface [11][12][13]. Thermal factor played a decisive role in all examinations.…”