حذف آلاینده دی اکسید گوگرد از گازهای احتراق از طریق واکنش کاتالیستی و تبدیل آن به گوگرد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، دانشگاه تربیت مدرس، تهران، ایران

2 دانشگاه تربیت مدرس دانشکده مهندسی شیمی

3 دانشکده مهندسی شیمی، دانشگاه صنعتی امیرکبیر

4 استاد دانشکده مهندسی شیمی، دانشگاه صنعتی امیرکبیر

5 واحد تحقیق و توسعه، شرکت مس سرچشمه، کرمان، ایران

چکیده

در این تحقیق، روش جدید برای حذف کاتالیستی دی ­اکسیدگوگرد از گازهای­ های حاصل از احتراق بررسی شد. آلومینا، آلومینا-مس و آلومینا-مولیبدن به­ عنوان کاتالیست برای واکنش دی اکسید گوگرد با متان و تبدیل آن به محصول مناسب سولفور آزمایش شد و نتایج آن­ها ازلحاظ میزان تبدیل و انتخاب­ پذیری با یکدیگر مقایسه شد. تاثیر دما، نسبت خوراک ورودی (SO2/CH4) و طول عمر کاتالیست بررسی شد. بررسی تاثیر دما در محدوده 550-800 درجه سانتی­گراد نشان داد واکنش به ­شدت وابسته به دماست. عملکرد کاتالیست­ های با مس و مولیبدن نسبت به کاتالیست آلومینا به­ شدت بهبود پیدا کرد و در بین همه کاتالیست­ ها، کاتالیست آلومینا-مس(10%) بهترین عملکرد را هم ازنظر میزان تبدیل و هم انتخاب ­پذیری از خود نشان داد. این کاتالیست در دمای 750 درجه سانتیگراد به­ میزان تبدیل 5/99 درصد و انتخاب ­پذیری بیش از 5/99 درصد رسید. تاثیر نسبت خوراک SO2/CH4 از 1 تا 3 بررسی و مشاهده شد که بهترین عملکرد کاتالیست ­ها در نسبت خوراک برابر مقدار استوکیومتری یعنی 2 است. همچنین، بررسی طول عمر کاتالیست نشان داد کاتالیست­ ها در زمان 5 ساعت پایداری بسیار مناسبی برای واکنش دارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Removal of sulfur dioxide pollutant from combustion gases through catalytic reaction and conversion that to sulfur

نویسندگان [English]

  • Seyyed Ebrahim Mousavi 1
  • Hassan Pahlavanzadeh 2
  • Masoud Khani 3
  • habib Ale Ebrahim 4
  • Abbas Mozaffari 5
1 Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
2 Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran.
3 Faculty of Chemical Engineering, Petrochemical center of Excellency, Amirkabir University of Technology, Tehran, Iran.
4 Faculty of Chemical Engineering, Petrochemical center of Excellency, Amirkabir University of Technology, Tehran, Iran.
5 Research and Development Unit, Sarcheshmah Copper Complex, Kerman, Iran.
چکیده [English]

I
 
In this work, new method for removal of sulfur dioxide from combustion gases was studied. Al2O3, Cu-Al2O3, and Mo-Al2O3 were examined as the catalysts for reduction of sulfur dioxide to elemental sulfur with methane and their performances were compared in terms of SO2 conversion and selectivity. The effects of temperature, SO2/CH4 molar ratio, and reaction time on SO2 reduction were studied. The operating temperature range was 550–800 °C and it was observed that the reaction is strongly temperature dependent. Performance of the catalyst extremely enhanced when molybdenum and copper were added as promoters, and the Al2O3-Cu (10%) catalyst showed the best performance between of all the catalysts in terms of SO2 conversion and selectivity. For the Al2O3-Co(10%) as the best catalyst, the conversion of 99.5% and selectivity more than 99.5% were achieved at 750 °C. Effect of molar feed ratio of SO2/CH4= 3-1 was studied and stoichiometric feed ratio showed the best performance. Also, investigation of reaction time for catalysts showed a good long-term stability for SO2 reduction with methane in 5 hours.
 
 
 

کلیدواژه‌ها [English]

  • SO2 removal from combustion gases
  • Catalytic reduction of SO2
  • alumina-copper
  • alumina-molybdenum

مراجع

 
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سوخت و احتراق
دوره 11، شماره 3
آذر 1397
صفحه 79-92

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سابقه مقاله

  • تاریخ دریافت: 27 فروردین 1397
  • تاریخ بازنگری: 26 خرداد 1397
  • تاریخ پذیرش: 28 خرداد 1397

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