کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7721024 | 1497510 | 2013 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nickel catalyst auto-reduction during steam reforming of bio-oil model compound acetic acid
ترجمه فارسی عنوان
خودکار کاهش کاتالیزور نیکل در اصلاح بخار روغن زیتون اسید استیک اسید
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کلمات کلیدی
کاتالیزور نیکل، خودکار کاهش، استیک اسید، اصلاح بخار، تولید هیدروژن، کربن،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Transition metal catalysts widely used in refineries are provided as oxides and require pre-reduction to become activated. The auto-reduction of a NiO/Al2O3 catalyst with acetic acid (HAc) followed by HAc steam reforming was investigated in a packed bed reactor. Effects of temperature and molar steam to carbon ratio (S/C) on reduction kinetics and catalyst performance were analysed. Results showed that a steady steam reforming regime along with complete NiO reduction could be obtained after a coexistence stage of reduction and reforming. A 2D nucleation and nuclei growth model fitted the NiO auto-reduction. The maximum reduction rate constant was attained at S/C = 2. Steam reforming activity of the auto-reduced catalyst was just below that of the H2-reduced catalyst, probably attributed to denser carbon filament formation and larger loss of active Ni. Despite this, a H2 yield of 76.4% of the equilibrium value and HAc conversion of 88.97% were achieved at 750 °C and S/C = 3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 35, 22 November 2013, Pages 15160-15172
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 35, 22 November 2013, Pages 15160-15172
نویسندگان
Feng Cheng, Valerie Dupont,