کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
635796 1456109 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation, characterization and stability of vanadium/Y2O3-stabilized ZrO2 composite membranes under different atmospheres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Preparation, characterization and stability of vanadium/Y2O3-stabilized ZrO2 composite membranes under different atmospheres
چکیده انگلیسی

In this experimental work vanadium/Y2O3-stabilized ZrO2 composite membrane was successfully fabricated by a two-step sintering process. The formation of a well-defined ceramic metal composite membrane was confirmed under high vacuum sintering conditions. Their surface morphology, stability and structural properties were studied as a function of temperature up to 1100 °C by thermogravimetry, differential thermal analysis, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction analysis. Significant differences were observed in the crystalline structure of the vanadium/Y2O3-stabilized ZrO2 composite membranes when they were treated at high temperature in different atmospheres (vacuum, air, hydrogen, nitrogen, and helium). The first hydrogen permeation investigation of vanadium/Y2O3-stabilized ZrO2 composite membrane is reported. Preliminary hydrogen permeation experiments have been confirmed that hydrogen flux was 1.08 ml min−1 cm2 for a dense vanadium/Y2O3-stabilized ZrO2 composite membrane (thick: 380 μm) at 300 °C using 100% H2 as the feed gas. Both high temperature XRD and ex situ study showed deterioration of membranes and the formation of a small amount of vanadium nitride (VNx) and vanadium hydride (VHx) solid solutions under nitrogen and hydrogen gas conditions, respectively.

Research highlights▶ Vanadium/YSZ composite membrane fabricated by two step sintering process in vacuum. ▶ The high hydrogen flux of 1.08 ml min−1 cm−2 at low temperature (300 °C). ▶ Characterization of the vanadium/YSZ composite membranes under different atmospheres. ▶ Ex situ study about deterioration of membranes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 370, Issues 1–2, 15 March 2011, Pages 149–157
نویسندگان
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