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

被引：11
|
作者：
Ramakrishnan, Girish [1 ]
Wu, Qiyuan [1 ]
Moon, Juhyuk [2 ]
Orlov, Alexander [1 ]
机构：
[1] SUNY Stony Brook, Mat Sci & Engn, 314 Old Engn, Stony Brook, NY 11794 USA
[2] Natl Univ Singapore, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 117576, Singapore
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 319卷
基金：
美国国家科学基金会;
关键词：
Concrete; Oxidation; XANES; DRIFTS; SO2 and NO2; Flue gas desulfurization; C-S-H; SIMULTANEOUS REMOVAL; CALCIUM HYDROXIDE; SULFUR-DIOXIDE; GAS DESULFURIZATION; LOW-TEMPERATURE; AL-TOBERMORITE; FLY-ASH; NOX; ABSORPTION;
D O I：
10.1016/j.cej.2017.02.135
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：57 / 64
页数：8
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