Reactions of SO2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study

Girish Ramakrishnan; Qiyuan Wu; Juhyuk Moon; Alexander Orlov

doi:10.1016/j.cej.2017.02.135

Reactions of SO₂ on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study

Girish Ramakrishnan
, Qiyuan Wu
, Juhyuk Moon
, Alexander Orlov

Materials Science and Engineering

Stony Brook University
National University of Singapore

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

An investigation of the adsorptive property of hydrated cement particle system for sulfur dioxide (SO₂) removal was conducted. In situ and ex situ experiments using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and X-ray Absorption Near Edge Spectroscopy (XANES) characterization techniques were employed to identify surface species formed during the exposure to SO₂. Oxidation of SO₂ to sulfate and sulfite species observed during these experiments indicated dominant reaction pathways for SO₂ reaction with concrete constituents, such as calcium hydroxide, which were also moderated by adsorption on porous surfaces of crushed aggregates. The impact of variable composition of concrete on its adsorption capacity and reaction mechanisms was also proposed in this work.

Original language	English
Pages (from-to)	57-64
Number of pages	8
Journal	Chemical Engineering Journal
Volume	319
DOIs	https://doi.org/10.1016/j.cej.2017.02.135
State	Published - 2017

Keywords

Concrete
DRIFTS
Flue gas desulfurization
Oxidation
SO and NO
XANES

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10.1016/j.cej.2017.02.135

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title = "Reactions of SO2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study",

abstract = "An investigation of the adsorptive property of hydrated cement particle system for sulfur dioxide (SO2) removal was conducted. In situ and ex situ experiments using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and X-ray Absorption Near Edge Spectroscopy (XANES) characterization techniques were employed to identify surface species formed during the exposure to SO2. Oxidation of SO2 to sulfate and sulfite species observed during these experiments indicated dominant reaction pathways for SO2 reaction with concrete constituents, such as calcium hydroxide, which were also moderated by adsorption on porous surfaces of crushed aggregates. The impact of variable composition of concrete on its adsorption capacity and reaction mechanisms was also proposed in this work.",

keywords = "Concrete, DRIFTS, Flue gas desulfurization, Oxidation, SO and NO, XANES",

author = "Girish Ramakrishnan and Qiyuan Wu and Juhyuk Moon and Alexander Orlov",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.cej.2017.02.135",

language = "English",

volume = "319",

pages = "57--64",

journal = "Chemical Engineering Journal",

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TY - JOUR

T1 - Reactions of SO2 on hydrated cement particle system for atmospheric pollution reduction

T2 - A DRIFTS and XANES study

AU - Ramakrishnan, Girish

AU - Wu, Qiyuan

AU - Moon, Juhyuk

AU - Orlov, Alexander

PY - 2017

Y1 - 2017

N2 - An investigation of the adsorptive property of hydrated cement particle system for sulfur dioxide (SO2) removal was conducted. In situ and ex situ experiments using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and X-ray Absorption Near Edge Spectroscopy (XANES) characterization techniques were employed to identify surface species formed during the exposure to SO2. Oxidation of SO2 to sulfate and sulfite species observed during these experiments indicated dominant reaction pathways for SO2 reaction with concrete constituents, such as calcium hydroxide, which were also moderated by adsorption on porous surfaces of crushed aggregates. The impact of variable composition of concrete on its adsorption capacity and reaction mechanisms was also proposed in this work.

AB - An investigation of the adsorptive property of hydrated cement particle system for sulfur dioxide (SO2) removal was conducted. In situ and ex situ experiments using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and X-ray Absorption Near Edge Spectroscopy (XANES) characterization techniques were employed to identify surface species formed during the exposure to SO2. Oxidation of SO2 to sulfate and sulfite species observed during these experiments indicated dominant reaction pathways for SO2 reaction with concrete constituents, such as calcium hydroxide, which were also moderated by adsorption on porous surfaces of crushed aggregates. The impact of variable composition of concrete on its adsorption capacity and reaction mechanisms was also proposed in this work.

KW - Concrete

KW - DRIFTS

KW - Flue gas desulfurization

KW - Oxidation

KW - SO and NO

KW - XANES

UR - https://www.scopus.com/pages/publications/85015056669

U2 - 10.1016/j.cej.2017.02.135

DO - 10.1016/j.cej.2017.02.135

M3 - Article

AN - SCOPUS:85015056669

SN - 1385-8947

VL - 319

SP - 57

EP - 64

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Reactions of SO₂ on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study

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Keywords

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