“…2, it is evident that virtually all of the quinoline reacted is converted to 1,2,3,4- where M is the compo~ent concentration, mole fraction, and the subscripts A, B, C, and D designate quinoline, 1,2,3,4-tetrahydroquinoline, o-propylaniline, and ammonia, respectively. The approach of quasi-stationary concentrations (steady state) is used to calculate k,, whereby the term dMc/dt in [3] is set equal to zero at a definite reaction time, t,,,, where tmaX is the reaction period at which o-propylaniline is of maximum concentration. From Figs.…”