گوگردزدایی اکسایشی از میعانات گازی با استفاده از نانوکاتالیست سولفید مولیبدن بر پایه اکسید گرافن

نوع مقاله : پژوهشی

نویسندگان

1 دکتری شیمی کاربردی/ دانشکده شیمی/ دانشگاه تهران، تهران، ایران

2 دکتری مهندسی شیمی/ استاد، مرکز نانوفناروی و کربن پژوهشگاه صنعت نفت، تهران، ایران

چکیده

در این پژوهش، نانوکاتالیست سولفید مولیبدن بر پایه اکسید گرافن (MoS2/GO) به روش اولتراسونیک سنتز شد و برای گوگردزدایی اکسایشی از میعانات گازی با میزان گوگرد اولیه ۲۸۵۰ppm  به کار گرفته شد. نانوکاتالیست با استفاده از آنالیزهای ویژگی‌سنجی XRD, BET, TPD, XPS، اسپکتروسکوپی رامان و آزمون راکتوری مورد ارزیابی قرار گرفت. نتایج نشان داد که نانوکاتالیست M9-GO با میزان 9 درصد وزنی فلز مولیبدن، میزان راندمان گوگردزدایی از میعانات گازی به میزان 98 درصد در شرایط عملیاتی (دمای 75 درجه سانتی‌گراد، میزان اکسنده %.3wt و مدت‌زمان 90 دقیقه و به کمک حلال استونیتریل) حاصل شد. همچنین کاتالیست  M9-GOبعد از 9 مرتبه، بازیابی بعد از واکنش استخراج-اکسایش، فعالیت و پایداری خوبی نشان داد. اثر مساحت سطح، قطر حفرات و اسیدیته کاتالیست‌ها بر عملکرد فعالیت گوگردزدایی اکسایشی نیز بررسی شد و نتایج نشان داد که هرچه میزان مساحت سطح، تخلخل و اسیدیته کاتالیست بیش‌تر باشد راندمان فرایند گوگردزدایی اکسایشی ارتقا می­یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Oxidative Desulfurization of Gas Condensate Using Graphene Oxide Supported Molybdenum Sulfide Nanocatalyst

نویسندگان [English]

  • Zohal Safaei 1
  • Alimorad rashidi 2
1 School of Chemistry, College of Science, University of Tehran, Tehran, Iran
2 Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran
چکیده [English]

In this study, molybdenum sulfide nanocatalyst supported graphene oxide was synthesized by ultrasonic method and was used for oxidative desulfurization of gas condensate with initial sulfur content of 2850 ppm. The nanocatalyst was evaluated using XRD, BET, TPD, XPS, Raman spectroscopy and reactor tests. The results showed that M9-GOnanocatalyst with 9%by weight of molybdenum metal, 98% desulfurization yield of gas condensate in operation conditions (7500C, oxidative agent 3%, and reaction time 90 min with acetonitrile solvent) was obtained.  M9-GO catalyst also showed good activity and stability after nine step, recovery after extraction-oxidation reaction. Also, the effect of surface area, pore diameter and catalyst acidity on the performance of oxidative desulfurization activity has been investigated. The results showed that the higher the surface area, porosity, and catalyst acidity, the higher the efficiency of oxidative desulfurization process.

کلیدواژه‌ها [English]

  • Gas Condensate
  • Oxidative Desulfurization
  • MoS2
  • Graphene Oxide
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