Effect of Mixing on the Pore Structure of Alumina Extrudates (pages 42–47)
John Landers, Mukundan Devadas, Alexander V. Neimark, Hye-Kyung Timken, Adeola Ojo and Arthur W. Chester
Article first published online: 10 DEC 2010 | DOI: 10.1002/ppsc.200900093
The mixing conditions have a direct impact on the pore structure of alumina extrudates. We study the pore structure of samples prepared with two mixers: a standard Eirich mixer and a smaller yet more severe Fukae mixer, which operates at 1500 rpm. We present the development of a bimodal pore size distribution within the range of 25–150 Å produced by using the Fukae mixer. The pore structure consists of larger pores that grow at the expense of the smaller ones and can be tuned as a function of mixing time.