گوگردزدایی اکسایشی نفتای سبک در حضور کاتالیست اکسید روی بر پایه زئولیت

نوع مقاله : مقاله پژوهشی

نویسندگان
زهرا مباشری 1
سید حسین زهدی 2
1 دانشجوی کارشناسی ارشد مهندسی شیمی، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران
2 استادیار، گروه مهندسی شیمی، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران
چکیده
در کشورهای مختلف قوانین سخت گیرانه‌ای برای کاهش مقدار گوگرد موجود در سوخت‌ها اعمال می‌شود. روش گوگردزدایی اکسایشی یکی از بهترین روش‌های تکمیلی برای فرآیند گوگردزدایی هیدروژنی است. در این مقاله با استفاده از روش سطح پاسخ، اثرهای اصلی و متقابل دما، مدت زمان واکنش و غلظت اولیه گوگرد موجود در نفتا بر درصد تبدیل گوگرد در فرآیند گوگردزدایی اکسایشی نفتای سبک در حضور کاتالیست اکسید روی بر پایه‌ی زئولیت بررسی گردید. تحلیل واریانس نشان داد داده‌های تجربی به‌خوبی توسط مدل فاکتوریل خطی برازش شده است. متغیرهای دما، مدت زمان واکنش و غلظت اولیه‌ی گوگرد موجود در سوخت بر درصد تبدیل ترکیبات گوگرد اثر معنادار دارد. همچنین بین متغیرهای دما و مدت زمان واکنش اثر متقابل وجود دارد. بیشترین مقدار درصد تبدیل گوگرد به میزان 90% در دمای واکنش K 320، زمان واکنش 40 دقیقه در حضور نفتای سبک با درصد اولیه گوگرد ppm 244 حاصل گردید.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Oxidative Desulfurization of Light Naphtha in the Presence of Zeolite Supported Zinc Oxide Catalyst

نویسندگان English

Zahra Mobasheri 1
Seyyed Hossein Zohdi 2
1 M. Sc. Student of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 Assistant Professor, Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
چکیده English

In various countries, strict rules are considered for reducing sulfur in the fuels. Oxidative desulfurization is known as one of the best complementary methods for the hydro-desulfurization. In this paper, using the response surface methodology, the effects of initial sulfur concentration in the naphtha fuel, reaction temperature, and reaction time on the sulfur conversion were investigated in the presence of zeolite supported zinc Oxide catalyst. Experiments were conducted at the conditions as follows: T=303.15-323.15 K, t=20-40 min, and initial sulfur concentration=150-250 ppm. Analysis of variance showed that the linear factorial model well fitted the experimental data. All the parameters as well as the interaction between reaction time and temperature affected the response, significantly. Maximum sulfur conversion of 90% was achieved at the temperature of 320 K, reaction time of 40 min, and initial sulfur concentration of 244 ppm.

کلیدواژه‌ها English

Light Naphtha
Desulfurization
Response surface methodology
Batch reactor
Empirical modeling
Interactions
Statistical analysis
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  • تاریخ دریافت 20 دی 1401
  • تاریخ بازنگری 25 بهمن 1401
  • تاریخ پذیرش 22 اسفند 1401