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Title: Reactions of SO 2 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.

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1409592
Report Number(s):
BNL-114644-2017-JA¿¿¿
Journal ID: ISSN 1385-8947
DOE Contract Number:  
SC0012704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemical Engineering Journal; Journal Volume: 319; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Ramakrishnan, Girish, Wu, Qiyuan, Moon, Juhyuk, and Orlov, Alexander. Reactions of SO 2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study. United States: N. p., 2017. Web. doi:10.1016/j.cej.2017.02.135.
Ramakrishnan, Girish, Wu, Qiyuan, Moon, Juhyuk, & Orlov, Alexander. Reactions of SO 2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study. United States. doi:10.1016/j.cej.2017.02.135.
Ramakrishnan, Girish, Wu, Qiyuan, Moon, Juhyuk, and Orlov, Alexander. Sat . "Reactions of SO 2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study". United States. doi:10.1016/j.cej.2017.02.135.
@article{osti_1409592,
title = {Reactions of SO 2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study},
author = {Ramakrishnan, Girish and Wu, Qiyuan and Moon, Juhyuk and Orlov, Alexander},
abstractNote = {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.},
doi = {10.1016/j.cej.2017.02.135},
journal = {Chemical Engineering Journal},
number = C,
volume = 319,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}