Heat capacity of sorbent

Physical, thermal, and chemical stability in order to reduce operating costs, solid sorbents must demonstrate stability under flue gas conditions, adsorption operation conditions, and during the multi-cycle adsorption-regeneration process. In particular, stability in the presence of water vapor is essential for the sustainable performance of the solid sorbent. In addition to thermal properties of the solid sorbent, heat capacity and thermal conductivity are also important in heat transfer operations. 

The results of comparative study of sorption properties of carbomineral sorbents (initial and modified form) on the purification of technological solution are demonstrated on Fig. 1-2. It is seen that carboncontaining sorbents provide efficient purification of iquid hydrocarbons and diesel oil from toxic impurities - chlorophyll and carotene. The absence of toxic impurities in liquid carbohydrate - vegetable oil (firom rape) provides, as it was stated by us experimentally, its high heating capacity as a component of biodiesel fuel. As... 

T = mass solute in fluid phase/mass of carrier gas Cp = heat capacity, and the subscripts are s = sorbent g = gas f = feed. 

New portions of the feed mixture gradually cool down the hot section of the sorbent bed and soon complete its saturation process. The length of the heat wave with a significantly enhanced sorbent temperature amounts to no more than 7—10 cm, even in the case of percolating the concentrated pentane/air mixture. Therefore, only a small portion of the total column experiences the temporary reduction of its adsorption capacity and, at the moment of pentane arrival at the column outlet, the major capacity of the sorbent bed proves to be used up almost completely. The heat evolution is less significant and the capacity loss is much smaller in the case of lower concentrations of pentane in the feed. 

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