from first principles PP-I-1

PP-III-3The Mechanism and the Optimal Choice of Reactor Typefor Heterogeneous-Catalytic Oxidation of Methanol to Methane AcidАliyev А.М., Mаmmadov E.M., Аliyev Q.S., Аliyeva U.А.Institute of Chemical Problems named after M.F.Nagiyev ANAS, Baku,Azerbaijanchemproblem@mail.ruOne of the main factors determining the completeness of the calculation of chemicaltechnologicalprocess is the selection of the optimal reactor. To study the process of gas-phaseoxidation of methanol on the modified zeolite catalyst it was based on the kinetic modeldeveloped for the stationary field of activity of the catalyst and the theoretical results of theoptimization. At the same time the possibility of implementing this process in a particulartype of reactor was evaluated by comparing the volume of the reaction zone, required toachieve a given degree of conversion in different reactors.The oxidation of methanol to formic acid was studied in single-stage continuous reactor ofideal mixing and ideal displacement reactor. The results of comparative studies of the processfor both reactors are shown in Figure. They were obtained under identical conditions: at thetemperature of the reaction zone Т = 115 0 S, partial pressuresmolar ratio СH 3 OH:O 2 :N 2 – 1:1:2.PO 2= 0,26 atm,PCH2 O=0,21 atm,Fig 1. The dependence of the degree of conversion - А and selectivity –Х of the process on the volume rate in the ideal mixing reactor (id.mix.) andin the ideal displacement reactor (id.dis.).From Figure that the utilization rate of the reaction volume for all degrees of conversion in thereactor of ideal displacement greater than in the ideal mixing reactor. With increasing degreeof conversion of 60 to 80% of the volume ratio of the investigated reactor increases from 1.22to 1.38. Similar results were also obtained for other reaction conditions.154