Nickel aluminate spinel reinforced ceramic hollow fibre membrane

详细信息    查看全文

• 作者：Yi-Lan Elaine Fung ; Huanting Wang
• 关键词：Ceramic membrane ; Hollow fibre ; Flexural strength ; Porous ; Nickel aluminate
• 刊名：Journal of Membrane Science
• 出版年：15 January, 2014
• 年：2014
• 卷：450
• 期：Complete
• 页码：418-424
• 全文大小：2077 K

文摘

Ceramic hollow fibre membranes are suitable for application in many industrial processes that involve harsh conditions such as high temperatures and concentrated organic solvents because of their high thermal and chemical stability. The major limitation of ceramic hollow fibre membrane is the brittle nature of ceramic materials, which leads to difficulty in large scale production and failure in pressurised processes. This paper presents the reinforcement of alumina (Al₂O₃) hollow fibre membrane by nickel aluminate spinel (NiAl₂O₄). The ceramic hollow fibre membrane was fabricated by the widely used phase inversion method. The NiAl₂O₄ phase was formed by the reaction of nickel (II) oxide (NiO) with Al₂O₃ during sintering. A maximum flexural strength of 156 MPa was achieved by the NiAl₂O₄/Al₂O₃ hollow fibre membrane containing 16.4 wt% of NiAl₂O₄, which was 2.3 times of that of the pure alumina sample. The 16.4 wt% NiAl₂O₄/Al₂O₃ hollow fibre membrane had a porosity of 46.8%, a mean pore size of 330 nm determined by a gas bubble pressure method, and a pure water flux of 597 L/m² h bar at a testing pressure of 2 bar. NiAl₂O₄/Al₂O₃ hollow fibre membrane could achieve a flexural strength comparable to higher-cost yittria stabilized zirconia and silicon nitride hollow fibres within the porosity range of 46.8-55.2%.