☆ 4.7 Article

Fabrication of Pd/ceramic membranes for hydrogen separation based on low-cost macroporous ceramics with pencil coating

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2010)

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

卷 35, 期 15, 页码 7803-7808

出版社

PERGAMON-ELSEVIER SCIENCE LTD

DOI: 10.1016/j.ijhydene.2010.05.102

关键词

Palladium membrane; Substrate modification; Pencil coating; Porous ceramics; Electroless plating; Hydrogen separation

类别

Chemistry, Physical Electrochemistry Energy & Fuels

资金

Natural Science Foundation of China [20876075]
National High-Tech Research and Development Program of China [2009AA05Z103]
Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [09KJA530003]

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摘要

Increasing hydrogen energy utilization has greatly stimulated the development of the hydrogen-permeable palladium membrane, which is comprised of a thin layer of palladium or palladium alloy on a porous substrate. This work chose the low-cost macroporous Al2O3 as the substrate material, and the surface modification was carried out with a conventional 2B pencil, the lead of which is composed of graphite and clay. Based on the modified substrate, a highly permeable and selective Pd/pencil/Al2O3 composite membrane was successfully fabricated via electroless plating. The membrane was characterized by SEM (scanning electron microscopy), field-emission SEM and metallographic microscopy. The hydrogen flux and H-2/N-2 selectivity of the membrane (with a palladium thickness of 5 mu m) under 1 bar at 723 K were 25 m(3)/(m(2) h) and 3700, respectively; the membrane was found to be stable during a time-on-stream of 330 h at 723 K. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

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