Fil ms ▁directed ▁by ▁André ▁Hun eb elle ▁Category : Path é ▁films <0x0A> </s> ▁Random ▁column ▁pack ing ▁refers ▁to ▁the ▁practice ▁of ▁pack ing ▁a ▁dist ill ation ▁column ▁with ▁randomly ▁fitting ▁fil tr ation ▁material ▁in ▁order ▁to ▁optimize ▁surface ▁area ▁over ▁which ▁react ants ▁can ▁interact ▁while ▁minim izing ▁the ▁complexity ▁of ▁construction ▁of ▁such ▁columns . ▁Random ▁column ▁pack ing ▁is ▁an ▁alternative ▁to ▁struct ured ▁column ▁pack ing . ▁ ▁Pack ed ▁columns ▁ ▁Pack ed ▁columns ▁util izing ▁filter ▁media ▁for ▁chemical ▁exchange ▁are ▁the ▁most ▁common ▁devices ▁used ▁in ▁the ▁chemical ▁industry ▁for ▁react ant ▁contact ▁optimization . ▁Pack ed ▁columns ▁are ▁used ▁in ▁a ▁range ▁of ▁indust ries ▁to ▁allow ▁int imate ▁contact ▁between ▁two ▁imm is cible / part ly ▁imm is cible ▁flu ids , ▁which ▁can ▁be ▁liquid / gas ▁or ▁liquid / liqu id . ▁The ▁flu ids ▁are ▁passed ▁through ▁a ▁column ▁in ▁a ▁counter ▁current ▁flow . ▁ ▁In ▁the ▁column ▁it ▁is ▁important ▁to ▁maintain ▁an ▁effective ▁mass ▁transfer , ▁so ▁its ▁essential ▁that ▁a ▁pack ing ▁is ▁selected ▁which ▁will ▁support ▁a ▁large ▁surface ▁area ▁for ▁mass ▁transfer . ▁ ▁History ▁ ▁Random ▁pack ing ▁was ▁used ▁as ▁early ▁as ▁ 1 8 2 0 . ▁Origin ally ▁the ▁pack ing ▁material ▁consisted ▁of ▁glass ▁spher es , ▁however ▁in ▁ 1 8 5 0 ▁they ▁were ▁replaced ▁by ▁a ▁more ▁por ous ▁p um ice ▁stone ▁and ▁pieces ▁of ▁co ke . ▁ ▁App lications