Absorcao e Stripping: Processos, Variaveis e Aplicacoes Ambientais

larger the absorbent flow rate the larger the A The absorbent flow rate can be reduced by lowering the solute Xvalue Because Xvalues for many solutes vary exponentially with trailing solute p this reduction can be achieved by already starting T andor increasing p Increasing p also reduces the diameter of the equipment for a given gas throughput However adjustment of T by refrigeration andor adjustment of p by gas compression increases both capital and operating costs For a stripper the stripping factor S 1A KYLI is crucial To reduce the required flow rate of stripping agent operation of the stripper at high T andor low P is desirable with an optimum stripping factor being about 14 For absorption and stripping design procedures are well developed and commercial processes are common Table 61 lists representative applications In most cases the solutes are in gaseous effluents Strict environmental standards have Figure 61 Typical absorption process