کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
639298 1456190 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of microporous ceramic membranes in the system TiO2/ZrO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Development of microporous ceramic membranes in the system TiO2/ZrO2
چکیده انگلیسی

The aim of the investigations is the development of new nanoporous ceramic membranes (pore size <1 nm) for gas separation with a significantly higher chemical and hydrothermal resistance than the generally used silica membranes. In selecting mixed-oxide systems as well as suitable calcination conditions, the favoured microporous properties and the corrosion resistance should be obtained. An increase of the crystallization temperature is necessary to keep the nanoporosity up to higher temperatures.TiO2–ZrO2 mixed-oxide membranes with varying compositions were prepared via sol–gel technique. At first tubular α-alumina supports (pore size 60 nm) were coated with mixed-oxide (TiO2–ZrO2) intermediate layers using the colloidal sol–gel route. The formed UF-membranes are applied as supports for subsequent coating experiments. The nanoporous TiO2–ZrO2 mixed-oxide membranes were prepared via a polymeric sol–gel method. The composition of the membranes is already predefined during the preparation of the sols by using the corresponding quantities of the starting alkoxides.The influence of the chemical composition and sintering parameters onto crystalline phases, pore size and surface area of the systems was investigated. SEM, filtration and corrosion tests as well as structural investigations like 17O NMR spectroscopy were carried out and discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 281, Issues 1–2, 15 September 2006, Pages 463–471
نویسندگان
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