POLIETILEN MUMI ISHLAB CHIQARISHDAN OLINADIGAN SUYUQ QO‘SHIMCHA MAHSULOTINING XOSSALARI: GX–MS TARKIBI VA YONILG‘I XUSUSIYATLARINI BAHOLASH
DOI:
https://doi.org/10.66960/jof.3093-8899.00022Kalit so‘zlar:
Polietilen krekingi, GX-MS tahlili, uglevodorod tarkibi, yonilg‘i xususiyatlari, setan soni, past haroratli xususiyatlar, polimer chiqindilari utilizatsiyasi, neft-kimyo xom ashyosiAbstrakt
Yuqori molekulyar og‘irlikdagi polietilenning termik parchalanishi orqali polietilen mumining ishlab chiqarilishining ortishi qo‘shimcha mahsulot sifatida suyuq uglevodorod fraksiyasini hosil qiladi, uning tarkibi va foydalanish potensiali yetarlicha o‘rganilmagan. Ushbu ishda ushbu suyuq fraksiyaning kimyoviy tarkibi va fizik-kimyoviy xususiyatlari uning sanoatda qo‘llanilishini baholash uchun har tomonlama o‘rganildi. Namuna polietilenni termik krekinglash jarayonida olingan va keyinchalik 220 °C gacha atmosfera bosimida haydash orqali fraksiyalangan. Molekulyar tarkib gaz xromatografiyasi-massa spektrometriyasi (GX-MS) yordamida aniqlangan, yonilg‘i bilan bog‘liq xususiyatlar esa tegishli ASTM usullariga muvofiq oktan soni, setan soni va past harorat xususiyatlarini o‘lchash orqali baholangan. GX-MS tahlili shuni ko‘rsatdiki, suyuq fraksiya asosan C8-C26 uglerod soni oralig‘idagi parafinli uglevodorodlardan iborat bo‘lib, asosiy hissasi C10-C16 birikmalaridan kelib chiqadi. Chiziqli alkanlar dominant komponentlar sifatida aniqlandi, ularga oz miqdordagi tarmoqlangan alkanlar va polietilen zanjirining uzilishi paytida hosil bo‘lgan oz miqdordagi olefinlar hamroh bo‘ldi. Olingan uglevodorod taqsimoti o‘rganilayotgan mahsulot odatda kerosin-dizel turidagi yonilg‘ilar bilan bog‘liq bo‘lgan o‘rta distillyat diapazoniga tegishli ekanligini ko‘rsatadi. Yonilg‘i xususiyatlarini tahlil qilish shuni ko‘rsatdiki, suyuqlik taxminan 42 setan sonini ko‘rsatadi, bu uning siqishli yonuv dvigatellari uchun qulay yonish xususiyatlarini tasdiqlaydi. Past haroratli o‘lchovlar −16 °C hiralanish haroratini va −27 °C qotish haroratlarini ko‘rsatdi, bu parafinga boy uglevodorod aralashmalari uchun odatiy holdir.
Natijalar shuni ko‘rsatadiki, o‘rganilgan suyuq fraksiyani to‘g‘ridan-to‘g‘ri standart tijorat yonilg‘isi sifatida tasniflash mumkin emas, lekin tegishli yangilash va tozalashdan so‘ng kerosin va dizel yonilg‘ilari uchun istiqbolli aralashtirish komponenti bo‘lib xizmat qilishi mumkin. Yonilg‘i qo‘llanilishidan tashqari, sanoat erituvchisi sifatida foydalanish, keyingi krekinglash yoki piroliz jarayonlari uchun xom ashyo, parafin ishlab chiqarish uchun xom ashyo, sirt faol moddalar va sintetik moylash materiallari uchun prekursor va sanoat reaktorlari uchun potentsial issiqlik uzatish suyuqligi kabi bir qancha muqobil foydalanish yo‘llari aniqlandi. Topilmalar polietilen krekingi suyuqliklarining qimmatli ikkilamchi uglevodorod resurslari sifatidagi salohiyatini ta’kidlaydi va polimerdan olingan uglevodorod oqimlari uchun yanada samarali va aylanma foydalanish strategiyalarini ishlab chiqishga hissa qo‘shadi.
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