A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]

S. Karthikeyan, Wan Kuen Jo, R. Dhanalakshmi, Mark A. Isaacs, Karen Wilson, G. Sekaran, Adam F. Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Wet catalytic oxidation of sodium poly[(naphthaleneformaldehyde)sulfonate], a hazardous contaminant of wastewater streams from the textiles industry, by hydrogen peroxide under ambient conditions was explored over platinum supported on a porous activated carbon (PAC). Bulk and surface properties of the Pt/PAC catalyst were investigated by XRD, XPS, SEM, TEM, FTIR, EPR and thermogravimetric analysis. The parent PAC, derived from pyrolysis and subsequent activation of rice husks, exhibited significant micro- and mesoporosity, and a high degree of surface oxidation. Incorporation of 1.7 wt% Pt resulted in mesopore blockage, and a corresponding drop in surface area, associated with the formation of large ∼8 nm metallic nanoparticles. Poly[(naphthaleneformaldehyde)sulfonate] oxidative degradation was studied as a function of reactant concentration and solution pH, revealing first order decomposition kinetics and good activity over pH 3–9 at ambient temperature. Electron Paramagnetic Resonance (EPR)-DMPO spin trapping experiments confirm that oxidation of the organic pollutant proceeded via hydroxyl radical generation. The 1.7 wt% Pt/PAC catalyst showed excellent catalyst stability for five consecutive runs over 25 h in a fluidised bed reactor, delivering > 85% removal of 100 mg/L sulfonate with negligible Pt leaching or activity loss, and comparable performance for treatment of a real tannery effluent stream with a COD equivalent of 1860 mg/L.

Original languageEnglish
JournalJournal of the Taiwan Institute of Chemical Engineers
Early online date13 Aug 2018
DOIs
Publication statusE-pub ahead of print - 13 Aug 2018

Fingerprint

Catalyst supports
Activated carbon
Degradation
Catalysts
Paramagnetic resonance
Oxidation
Microporosity
Organic pollutants
Catalytic oxidation
Textile industry
Platinum
Hydrogen peroxide
Hydroxyl Radical
Hydrogen Peroxide
Leaching
Surface properties
Thermogravimetric analysis
Effluents
Wastewater
Pyrolysis

Keywords

  • EPR
  • Naphthalene sulfonate
  • Oxidation
  • Platinum
  • Porous carbon

Cite this

Karthikeyan, S., Jo, W. K., Dhanalakshmi, R., Isaacs, M. A., Wilson, K., Sekaran, G., & Lee, A. F. (2018). A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]. Journal of the Taiwan Institute of Chemical Engineers. https://doi.org/10.1016/j.jtice.2018.07.028
Karthikeyan, S. ; Jo, Wan Kuen ; Dhanalakshmi, R. ; Isaacs, Mark A. ; Wilson, Karen ; Sekaran, G. ; Lee, Adam F. / A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]. In: Journal of the Taiwan Institute of Chemical Engineers. 2018.
@article{d7fec1cd892b4da884ebd79ece146425,
title = "A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]",
abstract = "Wet catalytic oxidation of sodium poly[(naphthaleneformaldehyde)sulfonate], a hazardous contaminant of wastewater streams from the textiles industry, by hydrogen peroxide under ambient conditions was explored over platinum supported on a porous activated carbon (PAC). Bulk and surface properties of the Pt/PAC catalyst were investigated by XRD, XPS, SEM, TEM, FTIR, EPR and thermogravimetric analysis. The parent PAC, derived from pyrolysis and subsequent activation of rice husks, exhibited significant micro- and mesoporosity, and a high degree of surface oxidation. Incorporation of 1.7 wt{\%} Pt resulted in mesopore blockage, and a corresponding drop in surface area, associated with the formation of large ∼8 nm metallic nanoparticles. Poly[(naphthaleneformaldehyde)sulfonate] oxidative degradation was studied as a function of reactant concentration and solution pH, revealing first order decomposition kinetics and good activity over pH 3–9 at ambient temperature. Electron Paramagnetic Resonance (EPR)-DMPO spin trapping experiments confirm that oxidation of the organic pollutant proceeded via hydroxyl radical generation. The 1.7 wt{\%} Pt/PAC catalyst showed excellent catalyst stability for five consecutive runs over 25 h in a fluidised bed reactor, delivering > 85{\%} removal of 100 mg/L sulfonate with negligible Pt leaching or activity loss, and comparable performance for treatment of a real tannery effluent stream with a COD equivalent of 1860 mg/L.",
keywords = "EPR, Naphthalene sulfonate, Oxidation, Platinum, Porous carbon",
author = "S. Karthikeyan and Jo, {Wan Kuen} and R. Dhanalakshmi and Isaacs, {Mark A.} and Karen Wilson and G. Sekaran and Lee, {Adam F.}",
year = "2018",
month = "8",
day = "13",
doi = "10.1016/j.jtice.2018.07.028",
language = "English",

}

Karthikeyan, S, Jo, WK, Dhanalakshmi, R, Isaacs, MA, Wilson, K, Sekaran, G & Lee, AF 2018, 'A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]', Journal of the Taiwan Institute of Chemical Engineers. https://doi.org/10.1016/j.jtice.2018.07.028

A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]. / Karthikeyan, S.; Jo, Wan Kuen; Dhanalakshmi, R.; Isaacs, Mark A.; Wilson, Karen; Sekaran, G.; Lee, Adam F.

In: Journal of the Taiwan Institute of Chemical Engineers, 13.08.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]

AU - Karthikeyan, S.

AU - Jo, Wan Kuen

AU - Dhanalakshmi, R.

AU - Isaacs, Mark A.

AU - Wilson, Karen

AU - Sekaran, G.

AU - Lee, Adam F.

PY - 2018/8/13

Y1 - 2018/8/13

N2 - Wet catalytic oxidation of sodium poly[(naphthaleneformaldehyde)sulfonate], a hazardous contaminant of wastewater streams from the textiles industry, by hydrogen peroxide under ambient conditions was explored over platinum supported on a porous activated carbon (PAC). Bulk and surface properties of the Pt/PAC catalyst were investigated by XRD, XPS, SEM, TEM, FTIR, EPR and thermogravimetric analysis. The parent PAC, derived from pyrolysis and subsequent activation of rice husks, exhibited significant micro- and mesoporosity, and a high degree of surface oxidation. Incorporation of 1.7 wt% Pt resulted in mesopore blockage, and a corresponding drop in surface area, associated with the formation of large ∼8 nm metallic nanoparticles. Poly[(naphthaleneformaldehyde)sulfonate] oxidative degradation was studied as a function of reactant concentration and solution pH, revealing first order decomposition kinetics and good activity over pH 3–9 at ambient temperature. Electron Paramagnetic Resonance (EPR)-DMPO spin trapping experiments confirm that oxidation of the organic pollutant proceeded via hydroxyl radical generation. The 1.7 wt% Pt/PAC catalyst showed excellent catalyst stability for five consecutive runs over 25 h in a fluidised bed reactor, delivering > 85% removal of 100 mg/L sulfonate with negligible Pt leaching or activity loss, and comparable performance for treatment of a real tannery effluent stream with a COD equivalent of 1860 mg/L.

AB - Wet catalytic oxidation of sodium poly[(naphthaleneformaldehyde)sulfonate], a hazardous contaminant of wastewater streams from the textiles industry, by hydrogen peroxide under ambient conditions was explored over platinum supported on a porous activated carbon (PAC). Bulk and surface properties of the Pt/PAC catalyst were investigated by XRD, XPS, SEM, TEM, FTIR, EPR and thermogravimetric analysis. The parent PAC, derived from pyrolysis and subsequent activation of rice husks, exhibited significant micro- and mesoporosity, and a high degree of surface oxidation. Incorporation of 1.7 wt% Pt resulted in mesopore blockage, and a corresponding drop in surface area, associated with the formation of large ∼8 nm metallic nanoparticles. Poly[(naphthaleneformaldehyde)sulfonate] oxidative degradation was studied as a function of reactant concentration and solution pH, revealing first order decomposition kinetics and good activity over pH 3–9 at ambient temperature. Electron Paramagnetic Resonance (EPR)-DMPO spin trapping experiments confirm that oxidation of the organic pollutant proceeded via hydroxyl radical generation. The 1.7 wt% Pt/PAC catalyst showed excellent catalyst stability for five consecutive runs over 25 h in a fluidised bed reactor, delivering > 85% removal of 100 mg/L sulfonate with negligible Pt leaching or activity loss, and comparable performance for treatment of a real tannery effluent stream with a COD equivalent of 1860 mg/L.

KW - EPR

KW - Naphthalene sulfonate

KW - Oxidation

KW - Platinum

KW - Porous carbon

UR - http://www.scopus.com/inward/record.url?scp=85051398796&partnerID=8YFLogxK

UR - https://www.sciencedirect.com/science/article/pii/S1876107018304322?via%3Dihub

U2 - 10.1016/j.jtice.2018.07.028

DO - 10.1016/j.jtice.2018.07.028

M3 - Article

AN - SCOPUS:85051398796

ER -

Karthikeyan S, Jo WK, Dhanalakshmi R, Isaacs MA, Wilson K, Sekaran G et al. A porous activated carbon supported Pt catalyst for the oxidative degradation of poly[(naphthaleneformaldehyde)sulfonate]. Journal of the Taiwan Institute of Chemical Engineers. 2018 Aug 13. https://doi.org/10.1016/j.jtice.2018.07.028