Removal of 1,2-dichlorobenzene from water emulsion using adsorbent catalysts and its regeneration

O V Netskina; E S Tayban; A P Moiseenko; O V Komova; S A Mukha; V I Simagina

doi:10.1016/j.jhazmat.2014.10.017

Removal of 1,2-dichlorobenzene from water emulsion using adsorbent catalysts and its regeneration

J Hazard Mater. 2015 Mar 21:285:84-93. doi: 10.1016/j.jhazmat.2014.10.017. Epub 2014 Oct 27.

Authors

O V Netskina¹, E S Tayban², A P Moiseenko³, O V Komova², S A Mukha², V I Simagina⁴

Affiliations

¹ Laboratory of Hydride Investigation, Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia. Electronic address: netskina@catalysis.ru.
² Laboratory of Hydride Investigation, Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia.
³ Laboratory of Hydride Investigation, Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia; Department of Chemistry and Chemical Technology, Novosibirsk State Technical University, Pr. Karla Marksa 20, Novosibirsk 630092, Russia.
⁴ Laboratory of Hydride Investigation, Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia; Siberian Branch of the Russian Presidential Academy of National Economy and Public Administration, Nizhegorodskaya 6, Novosibirsk 630102, Russia.

PMID: 25497020
DOI: 10.1016/j.jhazmat.2014.10.017

Abstract

Purification of emulsions of 1,2-dichlorobenzene (1,2-DCB) by carbon-based adsorbent catalysts has been studied. The cycle of purification includes: (1) adsorption of 1,2-DCB from the aqueous phase and (II) reductive regeneration by hydrodechlorination of the adsorbed 1,2-DCB by molecular hydrogen in the liquid phase. 1,2-DCB adsorption from aqueous solutions has been found to proceed by the mechanism of volume filling of pores. The rate of hydrodechlorination was shown to correlate with the particle size of the active component: the finer the particles, the higher the activity of the adsorbent catalyst. Pd/FAS with an average Pd particle size of 2.8 nm was found to be the most efficient catalyst.

Keywords: Adsorbent catalyst; Adsorption; Emulsion; Hydrodechlorination; Surface chemistry.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Carbon / chemistry*
Catalysis
Chlorobenzenes / chemistry*
Emulsions
Palladium / chemistry*
Recycling
Water / chemistry
Water Pollutants, Chemical / chemistry*

Substances

Chlorobenzenes
Emulsions
Water Pollutants, Chemical
Water
Palladium
2-dichlorobenzene
Carbon