کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7718044 1497482 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Catalytic reforming of glycerol in supercritical water with nickel-based catalysts
ترجمه فارسی عنوان
اصلاح کاتالیستی گلیسرول در آب فوق بحرانی با کاتالیزورهای مبتنی بر نیکل
کلمات کلیدی
تولید هیدروژن، اصلاح آب فوق بحرانی، کاتالیست بر پایه نیکل، گلیسرول،
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
The catalytic performance of nickel catalysts supported on La2O3, α-Al2O3, γ-Al2O3, ZrO2, and YSZ for supercritical water reforming of glycerol was investigated. Experiments were conducted in a tubular reactor made of Inconel-625 with the temperature range of 723-848 K under a pressure of 25 MPa. Carbon formation causing operation failure was observed for α-Al2O3, γ-Al2O3 and ZrO2 at temperatures higher than 748, 798 and 823 K, respectively. Ni/La2O3 exhibited the highest H2 yield where almost complete conversion was obtained at 798 K. Moderate space velocities (WHSV = 6.45 h−1) and glycerol feed concentration (5wt.%) favor high hydrogen selectivity and yield. Methanation is favored at a low WHSV or high glycerol feed concentration, resulting in a lower H2 yield. Increasing Ni loading on the Ni/La2O3 catalyst strongly promoted the reforming, water-gas shift, and methanation reactions, which contributed significantly to the product species distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 27, 12 September 2014, Pages 14739-14750
نویسندگان
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