کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1285791 1497932 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimizing anti-coking abilities of zeolites by ethylene diamine tetraacetie acid modification on catalytic fast pyrolysis of corn stalk
ترجمه فارسی عنوان
بهینه سازی توانایی های ضد کوکسازی زئولیت ها با تغییر اتیلن دیامین تترائوتیک اسید در پیرولیز سریع کاتالیزوری از ساقه ذرت
کلمات کلیدی
زئولیت، اتیلن دیامین تتراکتیو اسید، اصلاح شیمیایی، آلومینیوم چارچوب خارجی کک
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• We use EDTA modification methods to dealuminate external surface of HZSM-5.
• Treatment time of 2 h is optimal for acid removal and hydrocarbon formation.
• Modified HZSM-5 can promote the production of positive chemical compositions.
• Modified HZSM-5 can minimize coke yield.

In order to minimize coke yield during biomass catalytic fast pyrolysis (CFP) process, ethylene diamine tetraacetie acid (EDTA) chemical modification method is carried out to selectively remove the external framework aluminum of HZSM-5 catalyst. X-ray diffraction (XRD), nitrogen (N2)-adsorption and ammonia-temperature programmed desorption (NH3-TPD) techniques are employed to investigate the porosity and acidity characteristics of original and modified HZSM-5 samples. Py-GC/MS and thermo-gravimetric analyzer (TGA) experiments are further conducted to explore the catalytic effect of modified HZSM-5 samples on biomass CFP and to verify the positive effect on coke reduction. Results show that EDTA treatment does not damage the crystal structure of HZSM-5 zeolites, but leads to a slight increase of pore volume and pore size. Meanwhile, the elimination of the strong acid peak indicates the dealumination of outer surface of HZSM-5 zeolites. Treatment time of 2 h (labeled EDTA-2H) is optimal for acid removal and hydrocarbon formation. Among all modified catalysts, EDTA-2H performs the best for deacidification and can obviously increase the yields of positive chemical compositions in pyrolysis products. Besides, EDTA modification can improve the anti-coking properties of HZSM-5 zeolites, and EDTA-2H gives rise to the lowest coke yield.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 300, 30 December 2015, Pages 87–94
نویسندگان
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