Advancements in enforced C2S wet carbonation: Leveraging δ13C isotope tracking for reaction insights

IF 7.2 2区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Journal of CO2 Utilization Pub Date : 2024-09-11 DOI:10.1016/j.jcou.2024.102924
Marie Singer , Robert van Geldern , Johannes A.C. Barth , Daniel Jansen
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Abstract

This study concerns wet carbonation of β-C2S (Ca2SiO4) in a closed system at 23 °C. The progress of carbonation was detected by quantitative X-ray diffraction (QXRD) and thermogravimetric analysis (TGA). Further measurements of pH and ion concentrations as well as modelling carbon species and saturation indices were done. Additionally, stable carbon isotope ratios (δ13C) in CO2, dissolved inorganic carbon (DIC) and carbonate phases were measured. The aim of this study was to investigate δ13C isotope values during C2S carbonation. If a systematic fractionation of carbon isotopes occurs during the reaction, it can help to quantify the carbonation reaction. During the carbonation process over 48 h, we found carbon isotope distributions from the gaseous phase to the solution and ultimately to the solid phase. Calculations confirm the direct relation of δ13C values to the carbonation progress. With this, stable isotope measurements offer a promising tool to monitor the reaction progress in-situ.

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强化 C2S 湿碳化的进展:利用 δ13C 同位素跟踪深入了解反应
本研究涉及在 23 °C 的封闭系统中对β-C2S(Ca2SiO4)进行湿法碳化。碳化过程通过定量 X 射线衍射(QXRD)和热重分析(TGA)进行检测。此外,还进一步测量了 pH 值和离子浓度,以及碳物种模型和饱和指数。此外,还测量了二氧化碳、溶解无机碳(DIC)和碳酸盐相中的稳定碳同位素比值(δ13C)。本研究的目的是调查 C2S 碳化过程中的δ13C 同位素值。如果碳同位素在反应过程中发生系统分馏,则有助于量化碳化反应。在超过 48 小时的碳化过程中,我们发现了从气相到溶液并最终到固相的碳同位素分布。计算证实了 δ13C 值与碳化过程的直接关系。因此,稳定同位素测量为原位监测反应进程提供了一种很有前途的工具。
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来源期刊
Journal of CO2 Utilization
Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.90
自引率
10.40%
发文量
406
审稿时长
2.8 months
期刊介绍: The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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