QATTIQ KATALIZATORLAR REGENERATSIYASI: TIZIMLI TERMIK QAYTA TIKLASH SAMARADORLIGINI TUZILMA–FAOLLIK MEZONLARI ASOSIDA BAHOLASH
DOI:
https://doi.org/10.66960/jof.3093-8899.00024Kalit so‘zlar:
qattiq katalizator, koks, BET, HDS faolligi, sinterlanish, regeneratsiya indeksiAbstrakt
Ushbu maqolada sanoat gidrotozalash jarayonida ishlatilgan Co–Mo/γ-Al₂O₃ tipidagi qattiq katalizatorning turli termik regeneratsiya sharoitlariga javobi tuzilma–faollik mezonlari orqali baholandi. Yangi katalizator (AKM-Y), ishlatilgan katalizator (AKM-I) hamda 300, 450 va 600°C da regeneratsiya qilingan namunalar BET sirt yuzasi, g‘ovak hajmi, qoldiq koks, mexanik mustahkamlik va gidrodesulfurizatsiya (HDS) faolligi bo‘yicha taqqoslandi. Ishlatilgan katalizatorda koksning 10,8 mass.% gacha to‘planishi BET sirt yuzasini 238 dan 104 m²/g gacha, HDS faolligini esa 97,5 dan 43,0% gacha pasaytirgani ko‘rsatildi. 300°C da regeneratsiya faqat qisman tiklanish berdi; 450 °C da qoldiq koks 0,9 mass.% gacha kamayib, BET sirt yuzasi 211 m²/g va HDS faolligi 82,0 % ga yetdi. 600°C da qoldiq koks 0,3 mass.% gacha kamaygan bo‘lsa-da, sirt yuzasi va faollik 450°C rejimiga nisbatan pasaydi. Natijalar shuni ko‘rsatadiki, regeneratsiya samaradorligi faqat koksni maksimal olib tashlash bilan emas, balki koks oksidlanishi, g‘ovak tuzilmaning tiklanishi va faol fazaning termik barqarorligi o‘rtasidagi optimal muvozanat bilan belgilanadi.
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