Novel open cell aluminum foams and their use as reactive support for zeolite crystallization
Novel open cell aluminum foams and their use as reactive support for zeolite crystallization
复制标题
DOI：
10.1007/s10934-010-9359-3
复制
发表时间：
2011-02-01
影响因子：
2.6
通讯作者：
Grathwohl, G.
中科院分区：
文献类型：
--
作者：
Barg, S.;Soltmann, C.;Grathwohl, G.
采用一种新型的直接发泡法制备了开孔泡沫铝，该方法将低浓度烷烃相乳化在稳定的铝粉悬浮液中。在这种通用技术中，在乳化悬浮液的发泡过程中调节孔隙率参数，并通过高于Al的熔融温度的热处理来实现最终的稳定性。在这个阶段中，围绕Al颗粒的薄氧化物层和熔融金属的确定渗滤是必不可少的。该工艺路线的有效性通过成功发泡和最终结构稳定性所需的基本性能得到证明。此外，开孔泡沫铝/沸石复合材料表现出分级多孔结构（纳米和宏观尺度）的八面沸石的表面上开发的泡沫铝的水热合成。由于沸石X在N-2吸附中的有利性能，特别设想了该复合材料用于从空气中分离N-2的应用。
Open cell aluminum (Al) foams are developed in this work by a novel direct foaming process in which a low concentrated alkane phase is emulsified in a stabilized Al powder suspension. In this versatile technique, the porosity parameters are adjusted during foaming of the emulsified suspensions and the final stability is achieved by a thermal treatment above the melting temperature of Al. The thin oxide layers surrounding the Al particles and the ascertained percolation of the molten metal are essential in this stage. The efficiency of the processing route is demonstrated with the essential requisites for successful foaming and the final structural stability. Furthermore, open cell Al-foams/zeolite composites exhibiting a hierarchical porous structure (nano-and macroscale) are produced by hydrothermal synthesis of Faujasite-like zeolite on the surface of the developed AI-foams. Due to the advantageous properties of zeolite X in N-2 adsorption, the application of the composites for separation of N-2 from air is specially envisaged.