代入底物的物料平衡式并整理,有 dCs =-vs dt per 代入边界条件,积分有 PFRII-O =0时,Cs=Cso PFRIELPFR 时 S dcs rcso dCs PFR do C S dt)消耗代入底物的物料平衡式并整理，有 代入边界条件，积分有 时， 时， dCS = −VS dt PFR 0 0 = PFR l= t CS = CS 0 PFR l L PFR t = t = CS = CS         = − 0 0 S S S S C C S S C C S S PFR V d C d t d C d C t 消耗