Adhesion of nanosized nickel catalysts in the nanocatalysis/UF system
Adhesion of nanosized nickel catalysts in the nanocatalysis/UF system
复制标题
纳米催化/超滤系统中纳米镍催化剂的粘附
作者：
采用纳米催化反应与错流超滤（UF）相结合的方法，以对硝基苯酚为原料制备对氨基苯酚。在该系统中，纳米镍催化剂在悬浮液中使用在反应期间，然后通过UF膜过滤器从浆料中分离。镍颗粒粘附在接触表面上导致加氢速率和UF通量迅速下降。为了了解材料性质和操作参数对催化剂粘附性的影响，通过测量接触后固体表面剩余的镍质量来研究镍的粘附性。已经测试了具有不同粗糙度和亲水性的表面材料，例如聚（PTFE）（PTFE）、不锈钢（AISI 304）和玻璃。结果表明，粗糙表面比光滑表面具有更大的粘附力。亲水性玻璃的粘附力低于疏水性PTFE，而中等亲水性的不锈钢由于其表面磁效应而具有最大的粘附力。在超滤过程中，粘附力随横流速度的增加而减小，随悬浮液浓度的增加而增加。在悬浮液中加入微米级氧化铝颗粒，可以有效地抑制纳米镍的粘附。© 2007美国化学工程师学会AIChE J，2007。
A system combining nanocatalytic reaction with crossflow ultrafiltration (UF) was used to prepare p-aminophenol from p-nitrophenol. In this system, nanosized nickel catalysts in suspension were employed during reaction, and then separated from slurry by an UF membrane filter. The adhesion of nickel particles to contact surfaces caused a rapid decline in the hydrogenation rate and UF flux. In order to understand the effect of materials properties, and operating parameters on adhesion of catalysts, the nickel adhesion was investigated by measuring the mass of nickel remaining on solid surfaces after contact. Surface materials with different roughness and hydrophilicity have been tested, such as poly(tetrafluoroethylene) (PTFE), stainless steel (AISI 304) and glass. The results show that rougher surfaces have more adhesion than smooth ones. Hydrophilic glass has less adhesion than hydrophobic PTFE, while intermediately hydrophilic stainless steel has the most adhesion due to its surface magnetic effect. During ultrafiltration, adhesion decreases with increasing crossflow velocity and increases with increasing suspension concentration. With the addition of microsized alumina particles in suspension, the adhesion of nanosized nickel can be inhibited effectively. © 2007 American Institute of Chemical Engineers AIChE J, 2007.
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DOI：
10.1016/b978-0-12-391927-4.10024-6
发表时间：
1985
期刊：
The European Physical Journal C
影响因子：
--
作者：
J. Israelachvili
通讯作者：
J. Israelachvili
影响因子：
5.4
作者：
Haitao Zhang;Gangshan Wu;Xianhui Chen;X. Qiu
通讯作者：
Haitao Zhang;Gangshan Wu;Xianhui Chen;X. Qiu
DOI：
10.1016/s0927-7757(98)00299-4
发表时间：
1999-04
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
M. Michalski;S. Desobry;V. Babak;J. Hardy
通讯作者：
M. Michalski;S. Desobry;V. Babak;J. Hardy
影响因子：
2.7
作者：
J. Ding;Han Huang;P. McCormick;R. Street
通讯作者：
J. Ding;Han Huang;P. McCormick;R. Street
DOI：
10.1006/jcis.1995.1166
发表时间：
1995-04
期刊：
--
影响因子：
--
作者：
M. Kostoglou;A. Karabelas
通讯作者：
M. Kostoglou;A. Karabelas