Sintetik nafta tarkibidagi suyuq parafin uglevodorodlarining selektiv katalizator ta'sirida sikllanishi
Description
O‘zbekiston GTL zavodida ishlab chiqarilgan nafta tarkibini asosan parafinli uglevodorodlar tashkil qiladi. Neft-kimyo sanoati uchun muhim bo‘lgan aromatik uglevodorodlar kerosin uglevodorodlarini siklizatsiya qilish asosida olinadi. Parafin uglevodorodlarining mumkin bo‘lgan sikllanish yo‘llarini tanlash reaksiyadagi uglevodorodlarning tarkibiga, reaksiyaning selektivligiga, jarayon sharoitlariga, asosan, reaksiya aralashmasidagi vodorod konsentratsiyasiga bog‘liq. Mahalliy xomashyoning parafinli uglevodorod aralashmasining tarkibi va fizik-kimyoviy xossalari o‘rganildi. Olingan aromatik uglevodorodlarning miqdoriy nisbati dastlabki uglevodorodning tarkibi, tuzilishi va reaksiya sharoitlariga bog‘liq. 67-70 °C da olingan nafta tarkibida 45,3701% massa mavjud. pentan, massa bo‘yicha 31,8108%. geksan, 3,4788% massasi. geptan, massa bo‘yicha 0,3068%. oktanli uglevodorodlar mavjudligi o‘rganildi. Tadqiqot natijalariga ko‘ra, n-pentan o‘zining barcha o‘rganilgan gomologlari kabi sikllanmaydi, n-geksan esa n-oktan kabi sikllanadi. 350 °C haroratda va 0,2 soat-1 kosmik tezligida, n-pentan yangi tayyorlangan katalizatorda o‘zgarishsiz qoldi, n-geksan va n-oktan esa 3,5-4,5% aromatik uglevodorodlarga aylanadi. AlNiMo+bentonit katalizatori bilan Cr2O7 katalizatoridan foydalanilganda namunalar birinchi bosqichda aromatik uglevodorodlarga aylanganligi aniqlandi. Bu katalizatorlardan birgalikda foydalanish ngeksan, n-geptan va n-oktanning massa ulushi yuqori boʻlgan nafta uglevodorodlar aralashmasidan monoaromatik uglevodorodlar olishda yuqori selektivlikni koʻrsatdi.
Abstract (English)
The composition of naphtha produced at the GTL plant of Uzbekistan is mainly made up of paraffin hydrocarbons. Aromatic hydrocarbons, important for the petrochemical industry, are obtained based on the cyclization of paraffin hydrocarbons. The choice of possible cyclization paths of paraffin hydrocarbons depends on the composition of hydrocarbons in the reaction, the selectivity of the reaction, on the process conditions, mainly on the concentration of hydrogen in the reaction mixture. The composition and physicochemical properties of the paraffinic hydrocarbon mixture of local raw materials were studied. The quantitative ratio of aromatic hydrocarbons obtained depends on the composition, structure and reaction conditions of the initial hydrocarbon. Naphtha extracted at 67-70 °C contains 45.3701% mass. pentane, 31.8108 % by mass. hexane, 3.4788 % by mass. heptane, 0.3068 % by mass. presence of octane hydrocarbons was studied. In the results of the study, n-pentane did not cyclize like all of its studied homologues, while n-hexane did cyclize like noctane. At 350 °C and a space velocity of 0.2 hour-1, n-pentane remained unchanged on the freshly prepared catalyst, while n-hexane and n-octane converted to 3.5-4.5% aromatic hydrocarbons. When the Cr2O7 catalyst was used with the AlNiMo+bentonite catalyst, it was found that the samples were converted to aromatic hydrocarbons in the first step. The combined use of these catalysts showed high selectivity in the production of monoaromatic hydrocarbons from a mixture of naphtha hydrocarbons with a high mass fraction of n-hexane, n-heptane, and n-octane.
Files
13_QarDU_Xabarlari_maqola_44-48.pdf
Additional details
References
- 1. Кузнецов А.М., Савельев В.И., Бахтизина Н.В. Индустрия GTL: состояние и перспективы. - Научно-технический Вестник. ОАО «НК «Роснефть». 2. Федянов Е. А., Захаров Е. А., Ширшов Д. Б., Гаврилов Д. С. Использование синтез-газа в качестве топлива автомобильных ДВС. - Известия ВолгГТУ. – 2011, Т.8,№3. - С. 77–79. 3. Михайловский А.А., Терентьева Н.А. Получение синтетических углеводородов из природного газа по технологии GTL. Вестник технологического университета. 2015. Т.18, №23-C. 31-36. 4. Брагинский О.Б. Нефтегaзовый комплекс мира – М.: Изд-во «Нефть и газ» РГУ нефти и газа им. И.М.Губкина, 2006. – 640 с. 5. Gulnora Djuraeva, Javoxir Toshqobilov. research of the process of aromatization of paraffin fractions from synthetic oil. Samarkand. 313/4 01.05. 2024. 6. Паал З., Чичери Ж. Каталитические реакции циклизации углеводородов. - М.: Мир, 1988. – 265 с. 7. Kоrsаkоv S.N. Dеvеlоpmеnt оf а prоcеss fоr prоducing аrоmаtic cоncеntrаtеs frоm С 3 -С 7 аlkаnеs оn zеоlitе-cоntаining cаtаlysts / Diss. Ph.D. tеch. Sci. Ufа. 2004. 162 p 8. Djurayeva G.X., Toshqobilov J.Sh. Parafin uglevodorodlarni aromatlashda konversiya darajasining ahamiyati. "Innovatsion texnika va texnologiyalarning qishloq xo'jaligi – oziq-ovqat tarmog'idagi muammo va istiqbollari". TDTU. 26-27.04. 2024. 337-338 bet. 9. Opеrаting Mаnuаl fоr Prоduct Wоrk-up Uzbеkistаn GTL Qаrshi, 2022. 10. ASTM D6729 35C. GTL Nаphthа. 11. Tоshqоbilоv J.SH., DJurаyеvа G.X. Prоductiоn оf аrоmаtic hydrоcаrbоms bаsеd оn cycling оf lighthydrоcаrbоns- lоkаl оf Cоnfеrеncеs Qаrshi, 2024 .- 322 p.