via a chromatograph peak recorder simultaneously the bridge circuit emf 39 s are transmitted to two channels of a time sharing computer and returned as component concentrations via teletype printout channel no 1 printout shows the concentrations of low boiling product components reported in volume percent o 2 ch 4 co and also gives the reactor temperature the operating pressure and a reference flow usually the hcl flow all at sampling time channel no 2 printout shows the concentrations of the higher boiling product components co 2 hcl h 2 o ch 3 cl cocl 2 ch 2 cl 2 chcl 3 ccl 4 a four point temperature profile from thermocouples along the inside furnace wall is stored continuously by a temperature recorder the temperature of the sampling valve manifolds is also recorded here inlet concentrations of the reactants are programmed for analysis each hour during the time while the temperature of the reactor furnace is being changed in a given series of runs over a given catalyst table i__________________________________________________________________________ reaction rate u00d7 10 sup 7 over res depth all specific deacon time ch sub 4 chlor methane of mol g mol m sup 2 based perf sum ofrun temp sec conver select yield chlor sec sec on hcl fact errorsno deg c 1 sion 2.