- Title
- Decontamination of chlorine gas by organic amine modified copper-exchanged zeolite
- Creator
- Liu, Erming; Sarkar, Binoy; Chen, Zuliang; Naidu, Ravi
- Relation
- Microporous and Mesoporous Materials Vol. 225, p. 450-455
- Publisher Link
- http://dx.doi.org/10.1016/j.micromeso.2016.01.023
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2016
- Description
- Removal of chlorine gas (Cl₂) from air is of critical requirement in order to address point-source emissions possibly during a terrorist attack or an industrial accident resulting in Cl₂ contamination of the atmosphere. In this work, copper (Cu) exchanged zeolite Y (CuY) was functionalised with triethylenediamine (TEDA) and the capacity to remove Cl₂ was evaluated. The materials were characterised by nitrogen (N₂) adsorption-desorption studies, Fourier Transform Infrared (FTIR) spectroscopy and X-ray Photoelectron Spectroscopy (XPS). The materials' ability to remove Cl2 was investigated via a dynamic breakthrough test. Copper exchanged zeolite displayed a low adsorption of Cl₂ in spite of its large surface area. However, Cl₂ removal greatly improved following functionalisation with TEDA. XPS analysis revealed that Cl₂ was removed via a catalytic hydrolysis reaction where adsorbed water vapour transformed Cl₂ into Cl⁻ which could be further trapped in the zeolite structural framework. Moisture could increase the Cl₂ removal capacity, but the competition for adsorption between water and chlorine molecules was also observed. The spent adsorbent after exposure to Cl₂ could be easily recycled with an excessive water vapour treatment. The reusability was also investigated and the adsorbent could be used for more than five times. This material can potentially be used in air filters. It may provide an efficient way for decontaminating Cl₂ during a terrorist attack or an industrial accident.
- Subject
- zeolite functionalisation; chlorine decontamination; point-source emission; adsorption; adsorbent recycling
- Identifier
- http://hdl.handle.net/1959.13/1337538
- Identifier
- uon:27865
- Identifier
- ISSN:1387-1811
- Language
- eng
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