JOM
·
2022
·Vol. 75
·期 4
·1019-1033
·
IF 2.597
Luo Yinbo,He Dongfeng,Zhao Hongbo
Indirect mineral carbonation is considered an ideal CO 2 sequestration strategy because of its high carbonation rate and high value-added products. This research explores the carbonation ability of different carbon species—CO 3 2– ions, HCO 3 – ions, and H 2 CO 3 —in their dominant region. When (NH 4 ) 2 CO 3 was used as the carbon source, the Ca 2+ ions carbonation rate was hardly affected by pH, while NH 4 HCO 3 was the opposite. When the pH of the leachate decreased from 8.67 to 6.20, the carbonation rate of (NH 4 ) 2 CO 3 decreased from 99.32% to 98.42%, while the carbonation rate of NH 4 HCO 3 decreased from 96.28% to 37.71%. Meanwhile, this research also probed the influence of the nucleating agent on the carbonation rate and carbonation products. The addition of nucleating agent can increase the carbonation rate. For a CH 3 COOH concentration of 0.6 M for mixed leaching, the carbonation rate was increased by 26.81% with the addition of nucleating agent. Meanwhile, the nucleating agent can also induce the growth of CaCO 3 toward the crystal form of the nucleating agent itself. When (NH 4 ) 2 CO 3 and NH 4 HCO 3 were used as the carbon sources, CaCO 3 mainly exists in the crystal form of vaterite, and after adding the nucleating agent, the crystal form changes to calcite.
研究领域:
环境科学
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化学工程
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材料科学
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地球化学
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产品关联
DOI
高影响因子
JOM
·
2022
·Vol. 74
·期 5
·1958-1968
·
IF 2.597
Luo Yinbo,He Dongfeng
Indirect carbonation as an efficient CO 2 sequestration strategy has received extensive attention in recent years. This study proposes a two-step leaching indirect carbonation process using NH 4 Cl and CH 3 COOH in order to combine the advantages of the two leaching agents to obtain a better experimental outcome. The experimental results show that NH 4 Cl has a high pH buffering capacity, which can increase the pH of the mixed leachate to an alkaline level. Among the 21 groups of mixed leachate, 17 were alkaline (pH > 7). The mixed leachate has a high Ca 2+ ions carbonation rate under low CH 3 COOH concentration conditions, and the carbonation rate of steel slag with a particle size of < 38 μm can reach 60% when the CH 3 COOH concentration is 0.1 M. SEM imaging showed that the CaCO 3 formed by the reaction exists in a hexagonal calcite crystal form.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2021
·
IF 6.141
Jinmeng Zhu,Jinghan Ding,Peiyao Zhang,Wenqiang Dong,Xicheng Zhao,Mara Camaiti,Xuanhua Li
Due to the excellent compatibility and ageing-resistant performance, nanolime (NL) as a promising inorganic material is applied to consolidate aged sandstones and other arenaceous rocks based cultural heritage, such as wall paintings and stone relics. However, sometimes, NL does not assure a good consolidation strength for cultural relics. The existing researches on enhancing its consolidation strength are costly, time-consuming or still involving organic polymers. Here, utilizing inexpensive kaolin nanosheets as platform, we design and facilely synthesize a new nanolime/kaolin (N-K) nanocomposite by in-situ growth of Ca(OH) 2 nanoparticles on the surface of kaolin nanosheets. The kinetic stability of this nanocomposite is comparable to the NL. Application experiment shows that the consolidation strength of the N-K nanocomposite in the highly porous pterosaur fossil (65%, porosity) is stronger than that of NL. The reason is due to the incorporation of kaolin nanosheets into the CaCO 3 network after carbonation. For the first time, this work reports a new N-K inorganic nanocomposite and will facilitate the development of NL-based inorganic materials for the conservation of cultural heritage.
研究领域:
文物保护
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材料科学
·
古生物学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Yizheng Zhang,Genshen Li,Saisai Zhang,Shuqiong Luo,Xuemao Guan,Jianping Zhu,Xiangming Zhou,Songhui Liu
This study investigates the enhancement of mechanical properties in carbonated steel slag through surfactant-assisted CaCO 3 crystallization. Sodium dodecyl benzene sulfonate (SDBS) was employed at various concentrations (0.1–0.4 mol/L) and temperatures (20–60 °C) to modulate the carbonation process. Optimal performance was achieved with 0.2 mol/L SDBS at 40 °C, resulting in a maximum CO 2 uptake of 8.51 % and a compressive strength of 62.89 MPa, 81.66 % higher than unmodified steel slag. Characterization techniques confirmed the formation of crystalline calcite, vaterite, and aragonite, contributing to improved microstructure and strength. SDBS micelles act as templates for CaCO 3 nucleation and growth, with low concentrations facilitating carbonation and high concentrations inhibiting it. This research offers new insights into surfactant-assisted crystallization for enhancing carbonated steel slag properties, paving the way for high-performance, eco-friendly building materials from industrial waste.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yu Xue,Taiyue Chen,Xin Zhao,Jiaxiang Liu
Wet pre-carbonation of steel slag is an important solution to the steel slag soundness problem. This method, however, can consume a significant amount of silicate phase in steel slag. To address this issue, it is proposed that the consumption of calcium silicate can be reduced while the hydration performance of steel slag can be improved by adding acidic amino acids into the wet carbonation of steel slag. β-C 2 S is the main cementitious component in steel slag. Synthetized β-C 2 S was used to simulate the reaction mechanism of steel slag during carbonation and to study the role of acidic amino acids in carbonation. The carbonation products were characterized by XRD , FT-IR, TG-DTG, and SEM. The results demonstrated that without the addition of acidic amino acids, the carbonation degree of β-C 2 S reaching the maximum at 1 h under the experimental conditions. Calcite and amorphous silica was formed as a result of the carbonation of β-C 2 S. The final carbonation degree was lower after adding higher concentrations (0.1 mol/L) of acidic amino acids than before. Higher concentrations of acidic amino acids increased the content of metastable CaCO 3 , primarily vaterite. Acidic amino acids were added in the pre-carbonation of steel slag, then the steel slag was mixed with cement to prepare cementitious materials . The cementitious materials’ 28-day compressive strength was higher than without amino acids, and the maximum of strength increased by 9.45 % compared to that without amino acids. Whether amino acids were added or not, the boiling expansion value decreased to 0 after 1 h of carbonation, indicating that the carbonation reaction improved the soundness of cementitious materials.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
Journal of Sustainable Metallurgy
·
2023
·Vol. 9
·期 2
·588-598
·
IF 2.4
Chai Xin,Meng Fan-Cheng,Zhang Xiang-lan,Zhang Xu-kun,Sun Linquan,Wang Lina
Owing to the high Na/V molar ratio of Na 3 VO 4 solution, traditional precipitation of vanadium will consume more H 2 SO 4 and discharge ammonia–nitrogen wastewater with more Na 2 SO 4 . In present work, a new process was proposed, in which CO 2 was employed to carbonate Na 3 VO 4 solution with simultaneous recovery of NaHCO 3 , followed by NH 4 VO 3 precipitation and solution recycling. Carbonation kinetics of Na 3 VO 4 solution under both atmospheric and high pressures were studied. Under atmospheric pressure, the solution pH first decreased rapidly, slowly, rapidly again with carbonation time, and finally stabilized at pH 7.3; the formation of CO 3 2− and its conversion to HCO 3 − mainly occurred and the CO 2 absorption rates of different vanadium concentrations were almost the same (about 0.026 mol·m −3 ·s −1 ) at pH of 9.0‒9.6. Under high pressure, the reaction rates at early stage increased with CO 2 pressure and vanadium concentration, and stirring speed had the most significant effect on reaction rate with the highest CO 2 absorption rate of 1.73 mol·m −3 ·s −1 at 550 rpm. The average CO 2 utilization efficiency was ~ 90% with NaHCO 3 precipitation of 42.3% at 70 g·L −1 V under 1 MPa of CO 2 pressure, while the average CO 2 utilization efficiency was ~ 35% under atmospheric pressure. Finally, the reaction rate equation of carbonation under high-pressure was deduced. Graphical Abstract
研究领域:
化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Boqiang Wu,Xiaodong Wang,Shibin Zhu,Yuehong Zhang,Junhao Ye,Haibo Zhang,Songhui Liu
Magnesium slag (MS) is an alkaline waste residue from magnesium smelting processes. This study aimed to utilize the magnesium oxide in MS and adopt MgCl 2 as the calcium carbonate crystal modifier to prepare high length-to-diameter ratio aragonite whiskers via wet carbonation , which can achieve high-value recovery of MS while capturing CO 2 and enhancing cement as underground filling material . The effects of MgCl 2 concentration on the carbonation process , composition, microstructure, and morphology were systematically investigated. With increasing MgCl 2 concentration, more aragonite was obtained, reaching 94.9 % at 0.5 M MgCl 2 . Notably, at 0.1 M MgCl 2 , high length-to-diameter ratio aragonite whiskers with 16 were achieved. Introducing 1 wt% MS carbonated at optimal 0.1 M MgCl 2 into cement increased the 3 d and 28 d compressive strengths by 17.8 % and 22 %, respectively. Moreover, an excellent CO 2 sequestration capacity of up to 20.33 g CO 2 per 100 g MS was obtained for the carbonated MS. Therefore, wet carbonated MS with high content aragonite whiskers is a promising method for MS high-value utilization while reducing cement usage and CO 2 emission, as well as improving cement performance as underground filling material.
研究领域:
材料科学
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环境科学
·
矿业工程
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Can Cheng,Wenjun Huang,Haomiao Xu,Zhisong Liu,Xianwei Li,Hongzhi Shi,Yongmei Yu,Zan Qu,Naiqiang Yan
The steel smelting process produces extensive CO 2 and Ca-containing steel slag (SS). Meanwhile, the low value utilization of steel slag results in the loss of Ca resources. CO 2 sequestration utilizing SS can reduce carbon emissions while achieving Ca circulation. However, conventional SS carbon sequestration methods suffer from slow reaction rates, finite Ca usage efficiency, and difficulty separating the CaCO 3 product from SS. Herein, an innovative two-step leaching (TSL) and carbonation method was presented based on the variations in leaching efficiency of activated Ca under different conditions, aiming at efficient leaching, carbon sequestration, and high-value reuse of SS. This method employed two NH 4 Cl solutions in sequence for two leaching operations on SS, allowing the Ca leaching rate to be effectively increased. According to the findings, TSL could increase the activated Ca leaching rate by 26.9 % and achieve 223.15 kg CO 2 /t SS sequestration compared to the conventional one-step leaching (CSL) method. If part of the CaCO 3 is recovered as a slagging agent, about 34.1 % of the exogenous Ca introduction could be saved. In addition, the CO 2 sequestration of TSL did not significantly decrease after 8 cycles. This work proposes a strategy that has the potential for recycling SS and reducing carbon emissions.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2023
·
IF 1.8
Yong Hua,Dong Wang,Zhenjie Cui,Jianwei Guo,Jianwei Cao,Zhi Wang
In this paper, neodymium hydroxycarbonate (NdOHCO 3 ) was synthesized by carbon dioxide carbonatation. The effects of reaction temperature and aeration time of carbon dioxide (CO 2 ) on the morphology and phase of the carbonized products were studied. In addition, the carbonized process was analyzed to understand the evolution law of the crystalline phase. It was found that the relatively low supersaturation of bicarbonate ion was beneficial to the stable formation of NdOHCO 3 . While the supersaturation was relatively high, the NdOHCO 3 would continue to react with carbonic acid to form neodymium carbonate. The optical properties of NdOHCO 3 synthesized by this method were also studied, and the sample showed a strong broadband emission centered at 440 nm, which shows the potential applications in optical devices. NdOHCO 3 with uniform morphology and fine particle size was prepared by controlling the carbonatation process.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2025
·
IF 4.1
Cao Shuangming,Sun Jianguo,Liu Qian,Gu Yonghua
Crab shells, as the waste from seafood processing, are emerging as a valuable resource for recycling and environmental protection. By combusting the organic components of crab shells, the high-calcium crab shell ash (CSA) is produced. This ash serves as a promising raw material for CO 2 mineralization, contributing to energy conservation and emission reduction. In this study, the systematic mineralization experiment of CSA was conducted using wet carbonation, focusing on the effects of reaction temperature, liquid–solid ratio, particle size, and stirring speed on CO 2 mineralization. The optimal mineralization conditions were achieved at a temperature of 60 °C, a liquid–solid ratio of 10 mL/g, a stirring speed of 700 rpm, and a CSA particle size exceeding 200 mesh, resulting in a carbonation efficiency of 66.10%. Furthermore, we improved the mineralization process by modifying the CSA with Na 2 CO 3 and employing microwave treatment. The carbonation efficiency significantly increased to 71.80% with a Na 2 CO 3 concentration of 1.75 mol/L. Notably, microwave drying further enhanced the carbonation efficiency of CSA to 73.01%. Our findings contribute to a deeper understanding of CSA mineralization and establish a theoretical foundation and research direction for enhancing the carbon sequestration capacity and subsequent application performance of crustacean biomass ash.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2024
·
IF 10.8
Shuo Yang,Zhicheng Tang,Shiming Gao,Liwu Mo,Duyou Lu
Carbonation degree significantly impacts the volume stability of steel slag powder. To elevate the carbonation efficiency of steel slag and thereby alleviate the volume unsoundness of steel slag powder, sodium tripolyphosphate (STP) was used to enhance the micro morphology of CaCO 3 and accelerate Ca leaching and CO 2 diffusion. Three methods for assessing CO 2 uptake were employed to reliably determine the degree of carbonation. Results indicate that steel slag added with 0.05 wt% STP obtained a promotion exceeded 80 % in CO 2 uptake. Additionally, STP increased the CO 2 capture capacity of steel slag by 24.84 %. Under the influence of STP, the expansion of steel slag paste was reduced by up to 31.45 % following an autoclaving test. The formed micro CaCO 3 particles in carbonated steel slag without STP were polyhedral grains and a dense carbonation layer was formed around calcium silicate. Contrastively, CaCO 3 formed in the carbonated STP incorporated steel slag were conical or acicular particles and consequently generated a porous layer. The porous microstructure provided “tunnels” for the continuous CO 2 diffusion and Ca 2+ leaching and hence maintained relatively higher reaction speed throughout the carbonation process. Furthermore, STP also played the role as a chelator which accelerated the leaching of Ca 2+ .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
·
2020
·Vol. 235
·期 4
·451-466
·
IF 2.03
Yuli Xue,Yan Zhang,Xiaoling Tan,Wenqing Li,Zhongshu Li,Shaonan Xu,Peng Zhang,Jian Wang,Peiping Zhang,Shiding Miao
It is of importance to reclaim single-salt of potash from Li + -type brines of low concentration. In this work the potassium salts KHCO 3 was efficiently separated from the lithium carbonate-type brines with the aid of CO 2 carbonation. The phase field was provided in which the precipitation of KHCO 3 occurs and single-salt of potassium can be obtained. The low concentration of [Li + ] was also successfully concentrated to a high level (8.1 g/L), and this concentration can be used as sources for Li + -salts production using pre-developed strategies, which looks forward wider applications of the lithium resources of natural brine. This state-of-art was traced via isotherm evaporation on the quaternary system of Li + –K + –CO 3 2− –H 2 O at 298.15 K in which the carbonation steps were performed by CO 2 . Metastable phase diagram was found to consist of three invariant points, seven univariant curves, and four crystallization fields corresponding to Li 2 CO 3 , KHCO 3 , potassium carbonate sesquihydrate (K 2 CO 3 ⋅ 3/2H 2 O), and a potassium carbonate and potassium bicarbonate double salt (K 2 CO 3 ⋅ 2 KHCO 3 ⋅ 1.5H 2 O). There was no crystallization field corresponding to LiHCO 3 . The pH-composition diagram and density-composition diagram were also plotted. This work was carried out in aim of extracting/separating single salts of alkali metals from carbonate-type brines of west China.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）