Desulfurizacija dibenzotiofena i 4,6 – dimetildibenzotiofena procesom hidrogenovanja uz korišćenje RePd–TiO2/SiO2 aerogel katalizatora: proračun kinetičkih parametara i simulacijaprocesa Naučni rad

Glavni sadržaj članka

Dragana Prokić-Vidojević
https://orcid.org/0000-0002-4677-9609
Sandra B. Glišić
Radojica Pešić
https://orcid.org/0000-0002-5547-7450
Aleksandar M. Orlović
https://orcid.org/0000-0003-2645-8768

Apstrakt

Re/Pd-TiO2/SiO2 aerogel katalizatori su sintetizovani korišćenjem sol-gel metode i natkritičnog sušenja u višku rastvarača, i njihova katalitička aktivnost je ispitana u reakcijama hidrodesulfurizacije (HDS) dibenzotiofena (DBT) i 4,6-dimetildibenzotiofena (4,6-DMDBT). Oba Re/Pd katalizatora, dobijena sa ili bez mezitilena u procesu sinteze, su pokazala povećan stepen konverzije, za 70 %, u reakciji hidrodesulfurizacije 4,6-DMDBT u poređenju sa konvencionalnim Co/Mo katalizatorom koji se koristi u procesima hidroobrade. Ova zapažanja, veći stepen konverzije teško reagujućih 4,6-DMDBT u procesu hidroobrade, su značajna za dobijanje nisko-sumpornih dizel goriva (engl. ultra-low sulphur diesel fuels, ULSD). Kvantitativna analiza produkata hidrogenovanja DBT i 4,6-DMDBT, uključujući međuproizvode, izvedena je tehnikom gasne hromatografije – masene spektrometrije (engl. gas chromatography–mass spectrometry, GC-MS). Eksperimentalna reakcija je izvedena na 630 K i 60 bar u šaržnom katalitičkom reaktoru. Eksperimentalni podaci su korišćeni u okviru Hagen-Vatson (Hougen-Watson) kinetičkog modela koji opisuje proces hidrodesulfurizacije DBT i 4,6-DMDBT na σ i τ aktivnim centrima. Kinetički parametri su određeni korišćenjem numeričkih optimizacionih metoda, genetski algoritam simultano sa funkcijom minimuma odstupanja, i dobijeni rezultati pokazuju dobro slaganje sa eksperimentalnim podacima. Vrednosti izračunatih kinetičkih parametara kao i vrednosti selektivnosti (tj. odnosa metilcikloheksiltoluena i dimetilbifenila kao MCHT/(MCHT+DMBPH)) su potvrdile da je hidrogenovanje dominantni reakcioni put za hidrodesulfurizaciju 4,6-DMDBT. Potencijalne prednosti korišćenja Re/Pd aerogel katalizatora za konverziju 4,6-DMDBT potvrđene su i rezultatima uporednih simulacija ovog i konvencionalnog  Co/Mo katalizatora.

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Hemijsko inženjerstvo - Reaktorsko inženjerstvo

Kako citirati

[1]
D. . Prokić-Vidojević, S. B. Glišić, R. . Pešić, and A. M. Orlović, “Desulfurizacija dibenzotiofena i 4,6 – dimetildibenzotiofena procesom hidrogenovanja uz korišćenje RePd–TiO2/SiO2 aerogel katalizatora: proračun kinetičkih parametara i simulacijaprocesa: Naučni rad”, Hem Ind, vol. 76, no. 3, pp. 135–145, Jul. 2022, doi: 10.2298/HEMIND220114008P.

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