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Abstract
The effectiveness of Koch-Sulzer BX structured packing and random protruded packing are compared for an extractive distillation operation which exhibits high liquid to vapor ratios. The extractive distillation operation studied separated an 88/12 wt% toluene/heptane mixture with N-methyl pyrrolidone (NMP) as the solvent in a 0.15 m diameter column with about 5.5 m of packing. The effect of pressure drop and HETP on gas capacity factor, liquid loading and liquid-to-vapor ratio are examined.