Adlayers of palladium particles and their aggregates on porous polypropylene hollow fiber membranes as hydrogenization contractors/reactors

V V Volkov; V I Lebedeva; I V Petrova; A V Bobyl; S G Konnikov; V I Roldughin; J van Erkel; G F Tereshchenko

doi:10.1016/j.cis.2010.10.008

Adlayers of palladium particles and their aggregates on porous polypropylene hollow fiber membranes as hydrogenization contractors/reactors

Adv Colloid Interface Sci. 2011 May 11;164(1-2):144-55. doi: 10.1016/j.cis.2010.10.008. Epub 2010 Oct 31.

Authors

V V Volkov¹, V I Lebedeva, I V Petrova, A V Bobyl, S G Konnikov, V I Roldughin, J van Erkel, G F Tereshchenko

Affiliation

¹ Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia. vvvolkov@ips.ac.ru

PMID: 21106188
DOI: 10.1016/j.cis.2010.10.008

Abstract

Principal approaches for the preparation of catalytic membrane reactors based on polymer membranes containing palladium nanoparticles and for the description of their characteristics are presented. The method for the development of adlayers composed of palladium nanoparticles and their aggregates on the surface of hydrophobic polypropylene porous hollow fiber membranes is proposed, and their comprehensive study is performed. Various regimes of the deposition of palladium on individual fibers and on membrane surface inside membrane modulus are considered. The sizes of primary Pd particles range from 10 to 500 nm, and dimensions of their aggregates vary from 200 nm to tens of microns. The sizes of primary particles in a free state and in their aggregates are estimated by the methods of X-ray analysis and scanning electron microscopy. The proposed approach is used for the preparation of catalytic membrane contactors/reactors for the removal of dissolved oxygen from water. In the systems under study, the limiting stage of dissolved oxygen removal is concerned with diffusion-controlled delivery of oxygen to the surface of catalytic particles.