Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-III-30adequacy of multistage model were developed for arbitrary degrees of freedom of Σ 1 and Σ 2and were proved to be efficient.The following stage is process modeling in the catalyst grain. The equations of diffusionstochiometry and invariant relations for the efficiency factors of grain operation are derived.The latter substantially simplifies the procedures for calculating temperature andconcentration profiles of the reactants in the catalyst grain.The next step is modeling of industrial adiabatic reactor operation. The productivity of theprocess is 8 tons of raw material per hour. The process is carried out in four sectional reactorwith height of 14 m; diameter of 1.2 m. The composition of feed gas stated to be: CO 2 – 6 %vol.; CH 4 – 8% vol.; N 2 – 17 % vol.; H 2 &CO – the rest; with variation of molar ratio H 2 /COin a wide range from 1.2 to 2.1. The reactor model was chosen and its macrokineticparameters were estimated due to the results of pilot plant experiments. The adequacy of themodel results to experimental data was proved.The most favorable way of process performance is: volumetric flow rate – 5000 hr –1 , inlettemperature – 340 °C, molar ratio H 2 /CO – 2.05-1. The overall conversion of carbon oxideexceeded 30% vol.Higher alcohols produced meet all requirements to use them as components of motorfuels and as raw materials for high octane motor fuels production.References:1. M. Marchionna, M.D. Girolamo, L. Tagliabue. A review of low temperature methanol synthesis // Stud. InSur. Sci and Catal. 1998. V.119. P. 539.2. Е.В. Писаренко, В.Н. Писаренко, Р.М. Минигулов, Д.А. Абаскулиев. Энерго- и ресурсосберегающийпроцесс получения метанола из природного газа. // Теоретические основы химической технологии,2008, №42, №1, c. 14-20.3. Smith, K.J. and Anderson, R.B., 1984, A Chain Growth Scheme for the Higher Alcohol Synthesis. J. Catal.85, 428 – 436.4. Smith, K.J. and Anderson, R.B., 1983, The Higher Alcohol Synthesis Over Promoted Copper/Zinc OxideCatalysts. Can. J. Chem. Eng. 61 No. 1,40 – 45.5. Smith, K.J. and Herman, R.G. et al., 1990, Kinetic Modelling of Higher Alcohol Synthesis Over AlcalipromotedCu/ZnO and MoS 2 catalysts. Chem. Eng. Sci., 45, No. 8, 2369 – 2646.360