DOI: 10.1016/j.jcou.2017.11.003
Scopus记录号: 2-s2.0-85034975903
论文题名: Elucidating the accelerated carbonation products of calcium silicates using multi-technique approach
作者: Ashraf W. ; Olek J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 23 起始页码: 61
结束页码: 74
语种: 英语
英文关键词: Calcium silicate
; Carbonation
; DVS
; NMR
; XRD
Scopus关键词: Calcium
; Calcium carbonate
; Calcium compounds
; Carbonation
; Nuclear magnetic resonance
; Pore size
; Silica
; Silica gel
; Silicate minerals
; Silicates
; Thermogravimetric analysis
; X ray powder diffraction
; Accelerated carbonation
; Amorphous calcium carbonate
; Carbonation reactions
; Dynamic vapor sorption
; Experimental conditions
; Magic-angle-spining
; Multi-technique approach
; Nuclear magnetic resonance(NMR)
; Calcium silicate
英文摘要: This article features an investigation of the accelerated carbonation products of four calcium silicate phases, namely monoclinic-tricalcium silicate (3CaO·SiO2 or C3S), γ-dicalcium silicate (2CaO·SiO2 or γ-C2S), tricalcium disilicate (3CaO·2SiO2 or C3S2, rankinite), and monocalcium silicate (CaO·SiO2 or CS, wollastonite). During the carbonation reaction, the calcium silicate minerals form calcium carbonate and Ca-modified silica gel. These reaction products were examined using thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), 29Si magic angle spining (MAS) nuclear magnetic resonance (NMR), 13C {1H} cross polarized (CP)/MAS NMR, and dynamic vapor sorption (DVS) techniques. Along with the crystalline forms of CaCO3 (i.e., calcite, vaterite, and aragonite), amorphous calcium carbonate (ACC) was also found to be present in the carbonated calcium silicate systems. Based on the experimental results, it is proposed that the ACC particles were stabilized by the deposition of silica layers on their surfaces. Presence of ACC also affected the pore size distribution of the matrixes, which eventually influenced the diffusion based carbonation rate of the matrixes. Moreover, the degree of carbonation of CS was found to be most effective compared to other calcium silicates in terms of the percentage of the phase reacted for the experimental conditions used in this study. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111999
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Assistant Professor, Department of Civil and Environmental Engineering, University of Maine, OronoME 04469, United States; Professor, Lyles School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, United States
Recommended Citation:
Ashraf W.,Olek J.. Elucidating the accelerated carbonation products of calcium silicates using multi-technique approach[J]. Journal of CO2 Utilization,2018-01-01,23