کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
644446 1368130 2016 10 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Highly dispersed Ni/montmorillonite catalyst for glycerol steam reforming: Effect of Ni loading and calcination temperature
ترجمه فارسی عنوان
کاتالیزور نیکل/مونتموریلونیت بسیار پراکنده برای اصلاح بخار گلیسرول: اثر بارگذاری Ni و دمای کلسینه
کلمات کلیدی
مونت موریلونیت (MMT)؛ نانوذرات نیکل؛ اصلاح بخار گلیسرول (GSR)؛ بارگذاری نیکل؛ دمای کلسینه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Highly dispersed Ni/MMT catalysts were prepared by ultrasound cation exchange impregnation method.
• Effect of Ni contents and calcination temperature of Ni/MMT in GSR was evaluated.
• Mesoporous Ni/MMT with 20.9% Ni calcined at 700 °C showed excellent activity and stability.
• Lamellar structure and phyllosilicate content of MMT could improve activity and stability.

Montmorillonite (MMT) supported nickel nanoparticles (Ni/MMT) were prepared by an ultrasound assisted cation exchange impregnation method with rising pH technique. The Ni/MMT catalysts were characterized by different techniques including thermogravimetric analysis (TGA), N2 adsorption-desorption, X-ray powder diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), temperature programmed reduction (TPR), and temperature programmed oxidation (TPO). The characterization results showed the particle size, metal-support interaction, nickel dispersion interrelated with cation exchange capability and confinement effect of montmorillonite lamellar structure. The activity and stability tests were conducted in a fixed bed reaction and the reaction parameters of 600 °C and S/C = 3 were optimized. The effect of Ni loadings and calcination temperature were investigated. The results show that the Ni dispersion, particle sizes of Ni and metal-support interaction (MSI) are closely dependent on the Ni loading and calcination temperature. The MMT support favors dehydrogenation reaction pathway which is effective to suppress the coke deposition and the lamellar structure could provide strong confinement effect which is effective to inhibit Ni sintering. The phyllosilicate content in MMT could promote WGS reaction which is conducive to produce hydrogen rich gas with low CO concentration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 109, Part A, 25 October 2016, Pages 99–108
نویسندگان
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