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

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PP-III-2MATHEMATICAL MODELING OF PENTANE-HEXANE FRACTIONISOMERIZATION PROCESS ON SI-2 CATALYSTChekantsev N.V., Ivanchina E.D.Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russia,fax: 8(3822)56-34-43 E-mail: Domik86nik@mail.ruLast years <strong>the</strong> consumption <strong>of</strong> isomerizates as high octane number motor fuels componentessentially increased. The maintenance <strong>of</strong> optimal activity <strong>of</strong> isomerization catalyst andprevention <strong>of</strong> its deactivation is a very important problem.The aim <strong>of</strong> this work is to create ma<strong>the</strong>matical description <strong>of</strong> pentane-hexane fractionisomerization process and computer modeling system for estimating <strong>the</strong> main values <strong>of</strong> <strong>the</strong>process, controlling <strong>the</strong> catalyst state, its deactivation rate, finding optimal activity.The analysis <strong>of</strong> possible mechanism <strong>of</strong> pentane-hexane fraction isomerization processreactions was done, <strong>the</strong> formalized scheme <strong>of</strong> hydrocarbons transformation was formed(figure 1).BZBZMCPMCPCHCH3-MP3-MPn-Сn-С 662-MP2-MP2,3-DMB2,3-DMB2,2-2,2-DMBDMBn-С 4n-С4iso-С 4 iso-С4n-С 5 n-С5Giso-С 5 iso-С5iso-Сiso-С 7 7n-С 7 c-С 7n-С7c-С7Figure 1 – Formalized scheme <strong>of</strong> hydrocarbons transformationBZ-benzene; MCP-Methylcyclopentane; MP-methylpentane CH-cyclohexane;DMB-dimethylbutane; G-gas; n-normal; iso-isomer; c-cyclo;The ma<strong>the</strong>matical model <strong>of</strong> isomerization process consists <strong>of</strong> material and heat balanceequations, and it also is completed with equations considering aging, agglomeration, coking<strong>of</strong> catalyst.n⎧dCi= ∑ ± Wj⎪ dτj=1⎨n⎪ dT 1= ( ±ΔHj)*W⎪∑⎩ dτρ*Cp j=1j305

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