OP-II-3

PP-I-59KINETIC MECHANISMS OF CONVERSION OF NATURAL GAS INTOAROMATIC COMPOUNDS OVER MODIFIED PENTACYLVosmerikova L.N. 1 , Vosmerikov A.V. 1 , Litvak E.I. 21 Institute of Petroleum Chemistry, Siberian Branch of the Russian Academyof Sciences, 634021, 4, Akademichesky Avenue, Tomsk, Russia2 Tomsk Polytechnic University, 634050, 30, Lenin Avenue, Tomsk, RussiaE-mail: lkplu@ipc.tsc.ruThe development of new gas and gas condensate fields and their bringing intoservice raise the problem of rational use of low-molecular weight methane-associated paraffins С 2 -С 4 . Taking into account the scale of natural gas production,the leight alkanes are an important potential source of raw material for chemicalindustry. Of particular interest is an one-stage catalytic synthesis of aromatichydrocarbons from gaseous paraffins and olefins.The investigations have revealed the possibility to obtain the aromaticcompounds С 6 -С 9 and above from light satured hydrocarbons in presence of modifiedhigh-silica zeolithes. So, the development of the process of components of naturalgas over zeolithe catalysts is an actual task, which creates the prerequisites both forresource-saving under growing oil deficit conditions and for effective use of relativelycheap gaseous hydrocarbons as a raw material for valuable chemical substances ofdifferent purposes. The aromatization of the of natural gas components ischaracterized by complex kinetic mechanisms because during this processus thehydrocarbons of different homologue series participate in several types of chemicalreactions on the active catalytic centres simultaneously. Therefore, it isadvantageous to study the kinetics of this process via the methods for mathematicalsimulation using experimentally revealed dependancies.To study the kinetics of conversion of low alkanes into aromatic hydrocarbons theexperiments were carried out in a laboratory flow type quartz reactor at the reactiontemperature of 600-750 °С, the feedstock space velocity 500-5000 h –1 andatmospheric pressure. The high-silica ZSM-5 zeolite (molar ratio SiO 2 /Al 2 O 3 =40),which contained 0.5 wt % gallium oxide and 4.0 wt % molybdenum oxide was usedas a catalyst. The volume of catalyst in the reactor was varied from 0.5 to 4.0 cm 3 .Taking into account the stability of catalyst operation, the duration of experimentwas established in dependence on the process conditions. To evaluate the catalyticactivity of the samples in the natural gas conversion process, the degree ofconversion of a component of the feed gas was determined and the yield of gaseousand liquid products, as well as the selectivity for aromatic hydrocarbons was324