AICHE JOURNAL
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2026
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IF 4
Yixin Ma,Li Yang,Yan Zhang,Zhiwei Zhang,Haoliang Wang,Jingcai Cheng,Chao Yang
Considering the intrinsic difficulty of accurately determining the thermodynamic data of complex impurity-containing systems in industrial crystallization processes, this study creatively establishes a predictive correlation between infrared spectra, operating conditions, and the thermodynamics of the racemic methionine ( dl -methionine) crystallization system in K 2 CO 3 aqueous systems. Using principal component analysis, random forest, and Gaussian process regression architecture, a concentration prediction machine learning sub-model was constructed, yielding a coefficient of determination of 0.988 in the test set. Subsequently, a first-principle sub-model combining equilibrium conditions with the electrolyte activity coefficient model was established by developing a parameter optimization program fitted experimental data to obtain a predicting error of 2.09%. The solubilization effect of carbonate salt on methionine was quantitatively characterized. The influence of temperature, pH, and carbonate component on the distribution and activity coefficients of dl -methionine species was thoroughly investigated. The hybrid model can better serve for the analysis of industrial dl -methionine crystallization processes.
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高影响因子
Materials Today Communications
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2025
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IF 4.5
Yuanyuan Wang,Yingjing Xia,Xingshen Dong,Peng Qiao,Wenyi Wang,Hua Song
A series of mixed biomass-derived porous carbon materials were successfully synthesized using chitosan and hydroxypropyl cellulose (CSHPC) as precursors through K 2 CO 3 activation. Among the synthesized materials, CSHPC-3–700 demonstrated a superior hierarchical pore structure and abundant nitrogen/oxygen functional groups, exhibiting exceptional electrochemical performance: a high specific capacitance of 371.8 F·g −1 at 1 A·g −1 and an outstanding rate capability (235.2 F·g −1 at 100 A·g −1 ). In symmetric supercapacitors, CSHPC-3–700 achieved a high energy density of 10.17 Wh·kg −1 with 91.3 % capacitance retention after 20,000 cycles, significantly outperforming porous carbons derived from individual chitosan (CS-3–700) or hydroxypropyl cellulose (HPC-3–700) precursors. This study provides a viable strategy for developing high-performance supercapacitor electrodes through rational hybridization of biomass precursors.
研究领域:
材料科学
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电化学
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储能
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纳米技术
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高分子科学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
J. Dong,C.Y. Zhao
Molten carbonates are among the ideal candidate materials for high-temperature thermal energy storage, but with high corrosiveness. In this study, a novel corrosion mitigation strategy, termed Air-then-Argon (AA) treatment, is proposed. This study investigates the corrosion behavior of three alloys (SS310, In625, and In601) in Li 2 CO 3 -K 2 CO 3 (28.5–71.5 wt%) carbonate melt under different gas conditions. The effect of the AA condition on the corrosion behavior of the immersed alloys was tested and compared with alloys directly immersed under argon (Ar) and air. Via weight loss method, it was shown that SS310 exhibited very low corrosion rates under both conditions, with slightly better performance under the Ar condition. In contrast, In625 showed much higher weight loss (146.6 ± 26.8 mg/cm 2 , for 200h) under argon compared to the AA condition. Under the AA condition, SS310 exhibited 84.8 % less weight loss than in air, while In625 had 90.1 % reduction compared to Ar atmosphere. For In601, the weight loss under Ar was the smallest among the samples tested. The microstructure and elemental distribution of the corrosion layers were analyzed with thermodynamic calculations of metal oxidation. The study summarizes the corrosion mechanisms of alloys in different gas environments and it reveals that the abnormal weight loss of In625 under inert conditions is mainly due to the oxidation and dissolution of Mo and Nb, which disrupted the protective LiCrO 2 layer. SS310 and In625 were tested under the AA condition in more challenging 700 °C carbonate melt. Weight loss data after 500 h confirmed effective corrosion mitigation. The corrosion bilayers formed on alloys exposed to carbonate melt in air exhibited excellent corrosion resistance when subsequently in argon, suggesting that controlling the gas environment could be an economical and effective method for mitigating carbonate corrosion.
研究领域:
材料科学
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化学工程
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高影响因子
ELECTROCHEMISTRY
·
2022
·Vol. 90
·期 10
·107004-107004
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IF 1.777
Gong CHEN,Dingwei MIN,Yipeng HUANG
As a way to explore methods to capture and transform CO2 into useful carbon materials, the electrochemical mechanism of carbonate ion reduction in molten Li2CO3–K2CO3 eutectic mixtures is studied by cyclic voltammetry, chronopotentiometry, and chronocoulometry. Evidence indicates CO32− to undergo reduction to produce solid carbon before the alkali metal ions Li+ and K+. The electrode reactions consist of a diffusion-controlled, totally irreversible process comprising a one-step electron transfer. Notably, the described electrochemical process produces carbon sheets, submicron carbon tubes, or submicron carbon particles, depending on the applied cathodic overpotential. When O2− ions are released as part of the electrochemical reduction of CO32−, some of these ions immediately combine with Li+ to form insoluble Li2O, which are disadvantageous processes from the standpoint of CO2 capture in the cathodic region. Results suggest thus that a type of molten salt electrolyte in which alkali metal oxides are highly soluble should be employed for effective molten salt CO2 capture and electrochemical transformation.
研究领域:
材料科学
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电化学工程
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DOI
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
X.J. Xue,J. Dong,C.Y. Zhao
Molten carbonate salt is one of the promising candidates for high-temperature thermal energy storage tailored towards advanced pumped-thermal energy storage and next generation concentrated solar power technologies. However, severe corrosion of structural materials exposed to molten carbonate salts poses one of the most pivotal threats in terms of limiting their large-scale application at ever-escalating temperatures. Here, we elaborate the compatibility of three commercial austenitic stainless steels specifically SS310, SS316L and Incoloy 625 with Li 2 CO 3 -K 2 CO 3 (28–72 wt%) eutectic salt. The corrosion behavior and corrosion mechanism of Fe-Cr (SS316L), Fe-Cr-Ni (SS310) and nickel-based (In625) alloys at 600 °C in air were also investigated. It revealed that SS310 exhibited better corrosion resistance compared to SS316 and In625, with weight loss of 23.8 mg/cm 2 and corrosion rate of 522 μm/year after 500 h of exposure at 600 °C. This implies that higher Ni content of the alloy may not necessarily improve the corrosion resistance, it is associated with the basicity of the molten and the solubility of Ni salt in the melt. ICP analysis indicated that the salts exposed to SS310 and In625 at the same exposure time both had nearly 11 times more Ni than that exposed to SS316. Precisely, it is related to the behavior of the Cr-enriched zones formed in the corrosion layers of different alloys. The corrosion mechanism of SS310 specimens in molten carbonate can be generally divided into the following steps: (i) selective oxidation of the metal elements and lithiation reactions of the metal oxides to generate a passivation scale, (ii) an ever-growing middle transition scale consisted of mixed metal oxides and lithium-containing compounds, (iii) cracking and peeling off of the corrosion scale.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Fangzheng Zou,Xianxiang Bai,Hao Wu,Jiguang Li,Lingjun Tan,Xuehua Shen,Zuotai Zhang,Feng Yan
K 2 CO 3 enhances oxidative stability of PEI-based adsorbent without sacrificing CO 2 uptake. • K 2 CO 3 regulates pore confinement and surface acid-base properties of the silica support. • In situ DRIFTS and mass spectrometry reveal suppressed PEI oxidative degradation. • EPR and 1 H NMR confirm reduced radical accumulation and restricted chain mobility. • DFT calculations reveal inhibited hydrogen abstraction by K 2 CO 3 charge regulation. Solid amine adsorbents are promising candidates for CO 2 capture, but their practical application is severely limited by oxidative degradation under high-temperature and oxygen-containing conditions. Conventional strategies mainly rely on chemical modification of amine species, which often compromises CO 2 adsorption capacity or introduces complex synthesis routes. Herein, we report a simple yet effective strategy using K 2 CO 3 as an inorganic additive to enhance the oxidative stability of polyethyleneimine (PEI)-based adsorbents. The introduction of K 2 CO 3 make total PEI content was comparable, but significantly improves CO 2 uptake retention after accelerated oxidation compared with the pristine counterpart. Systematic characterizations reveal that K 2 CO 3 regulates the local microenvironment by tuning pore confinement and surface acid-base properties of the silica support, while modifying the interfacial chemical environment of PEI. In situ DRIFTS and mass spectrometry analyses demonstrate that K 2 CO 3 suppresses the formation of carbonyl/imine-containing intermediates and reduces the evolution of volatile degradation products. Electron paramagnetic resonance and 1 H NMR relaxation results indicate that K 2 CO 3 inhibits radical accumulation and restricts polymer chain mobility. Density functional theory calculations further reveal that K 2 CO 3 reduced the thermodynamic driving force for hydrogen abstraction and modulates local charge distribution at reactive sites, suggesting suppressed radical initiation difficult. This work provides a simple inorganic additive strategy for constructing durable solid amine adsorbents, offering a general design principle for durable CO 2 capture applications under harsh oxidative conditions. Download: Download high-res image (380KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhenya Zhang,Min Zhang,Bowen Xing,Ting Liu
Conventional coal-based carbon activation usually requires strong acid washing operation after activation, which not only consumes more experimental time but also pollutes the environment. In this study, a novel method for the preparation of coal-based carbon gas-sensitive materials is described and its gas-sensitive properties are investigated. Specifically, a novel composite coal-based carbon/K 2 CO 3 gas-sensitive material was prepared more easily by using low-cost coal as the carbon source and KOH as the activator without acid washing after activation, which was unexpectedly found to possess excellent gas-sensitive properties, which gave us great encouragement. The samples obtained at the activation temperature of 500 °C and with a carbon-to-alkali ratio of 1:1 have more defective active sites as well as chemisorbed oxygen content, which is advantageous for enhancing the gas-sensitive performance of the samples. In addition, the introduced alkaline potassium carbonate component also favors the adsorption of acidic formaldehyde gas. The response of the sensor fabricated using the above sample was 6415.68 % for 500 ppm formaldehyde at room temperature and a response cycle was completed in about ten seconds. In addition, the fabricated gas sensor was applied to the monitoring of volatile formaldehyde in paints, which shows that the sensor has the potential to be applied in the detection of formaldehyde gas emitted in the field of home decoration and building materials.
研究领域:
材料科学
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环境监测
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传感器技术
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化学检测
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Xue-Ze Wang,Yang-Hai Zheng,Yun Xue,Yong-De Yan,Fu-Qiu Ma,Mi-Lin Zhang,Hai-Yun Bai,Zi-Qi Kou,Jian-Peng Liu
With the continuous development of the nuclear industry, there is an urgent need to find a method that can safely and efficiently dispose of spent resins. Molten salt oxidation (MSO) is a promising waste treatment technology . In this paper, the newly shipped resins were used to simulate the actual spent ion exchange resins . The destruction of the resins is mainly divided into three stages. The addition of oxygen can increase the activation energy ( E ) required for the reaction. Some solid residues which were proved to be amorphous carbon materials generated after MSO. In the high-resolution XPS spectra of C 1s, the C-S bond disappeared after MSO at 400 ℃ for 2 h proved the destruction of the sulfonic acid groups. The core-level scan XPS spectra of S 2p illustrated that sulfur and sulfonyl bridges were formed after sulfonic acid groups were destroyed. The infrared spectrum also showed that the sulfonic acid groups were destroyed at 400 ℃ to form sulfonyl structure, but sulfur bridges were not found due to its small IR absorptions. In this paper, the ternary eutectic Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 , can be operated efficiently at a relatively low temperature. The generated sulfur dioxide is captured by the carbonate to form sulfate. These merits make MSO become a promising and environmentally friendly approach for the treatment of sulfur-containing organic waste.
研究领域:
核工业废物处理
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环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Pengxin Zeng,Chuanwen Zhao,Chenxi Liang,Peiyu Li,Haoxuan Zhang,Ruilin Wang,Yafei Guo,Hongqiang Xia,Jian Sun
K 2 CO 3 -based adsorbent pellets produced by graphite-casting method are promising alkali metal-based solid CO 2 adsorbents. The incorporation of porous metal oxide supports is an effective to enhance CO 2 adsorption capacity of K 2 CO 3 -based adsorbent pellets. In this work, graphite-casted K 2 CO 3 -based adsorbent pellets incorporated with different porous supports (i.e., TiO 2 , ZrO 2 , and SiO 2 ) were prepared for CO 2 capture. Comparatively, the ZrO 2 -supported, K 2 CO 3 pellets loaded with 30 wt% of K 2 CO 3 exhibit the highest CO 2 adsorption capacity, approximately 0.93 mmol/g. For the SiO 2 -supported K 2 CO 3 adsorbent pellets, the high calcination temperature (>700 °C) required to remove the graphite layer covering the pellet surface will cause the formation of new eutectics (i.e., K 2 Si 2 O 5 and K 2 Si 4 O 9 ), which leads to the collapse of the adsorbent pellets. Low calcination temperature of 500 °C can avoid the collapse of the SiO 2 -supported K 2 CO 3 adsorbent pellets and remove most of the graphite on the surface. Moreover, the CO 2 adsorption capacity can be further increased to 1.30 mmol/g by adding 20 wt% of microcrystalline cellulose to the SiO 2 -supported K 2 CO 3 adsorbent pellet. Although the adsorption capacity of structurally improved, SiO 2 -supported K 2 CO 3 pellets is still inferior to that of structurally improved, ZrO 2 -supported K 2 CO 3 pellets, they exhibit great cost advantage. Therefore, SiO 2 -supported K 2 CO 3 pellets with 20 wt% of microcrystalline cellulose have industrial application prospects.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2026
·
IF 13.8
Mingzhu Liu,Xuelu Ding,Shan Yu,Qin Cen,Wenkang Hu,Zhiru Dai,Huaimao Tie,Xuefeng Zeng,Yuejun He
Okara is a high-dietary-fiber byproduct of soybean processing with low utilization rates. Its insoluble dietary fiber (IDF) possesses significant nutritional value, yet its natural dense structure and limited interfacial activity constrain its application in food systems. To enhance its functionality, this study modified IDF using food-grade K 2 CO 3 to improve its structural and interfacial properties. The interfacial assembly behavior and stabilization mechanism of the modified fiber (M-IDF) in Pickering emulsions were investigated. Results showed that K 2 CO 3 treatment altered IDF's microstructure, reducing crystallinity to 17.32%. and significantly increased the zeta potential of M-IDF (−20.83 mV), thereby improving its water retention capacity, oil adsorption ability, and wetting properties. Consequently, M-IDF Pickering emulsions constructed with a 20% oil phase formed smaller, better-dispersed droplet structures and exhibited higher emulsifying activity and emulsion stability. Simulated gastrointestinal digestion experiments further demonstrated that the dense particle layer formed by M-IDF at the lipid droplet interface effectively inhibits droplet aggregation and lipase adsorption. This resulted in a free fatty acid (FFA) release rate of only 53.07% at 120 min, showcasing excellent lipid sustained-release capability. This research significantly enhances the structural and interfacial functionality of Okara IDF, positioning it as a promising natural solid emulsifier. It also provides a novel pathway for developing stable emulsified foods, fat-controlled foods, and functional delivery systems.
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Chen Meng-qi,Xu Jie,Wei Yan,Hao Shuang-hong
The primary aim of this study is to develop a recovery process for PhSO3K from the industrial waste of Qpe (quizalofop-p-ethyl) production. The solubility data for the PhSO3K–K2CO3–H2O system at 15, 25, 35, 45, and 55 °C were determined to obtain the phase diagram of the system. Moreover, the different crystallization fields in the phase diagram of 25 °C were analyzed. The separation technology of PhSO3K from the PhSO3K–K2CO3–H2O system was designed based on the phase diagram. Furthermore, the PhSO3K and K2CO3 in a wastewater from Qpe production were crystallized in sequence by evaporation according to the designed method. The organic impurities precipitated concomitantly with PhSO3K were washed out by ethanol. Finally, the purified PhSO3K was converted to (R)-ethyl O-bezenesulfonyl lactate, the intermediate of Qpe production.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Qiuhong Huang,Qi Sun,Zhongyue Tang,Xuefeng Zeng
The value-added utilization of okara is restricted by the large particle size and high cost of microfabrication means. In this study, the changes of particle size and dietary fiber content of okara treated with K 2 CO 3 are investigated, and the effects of micronized okara(MO)(0%, 8%, 16%, 24%) on the physicochemical quality and in vitro starch digestion of rice tofu(RT) are further explored. The particle size of okara varied from 458.24 μm to 37.06 μm by being treated with K 2 CO 3 . The quality results of microfined okara rice tofu (MO-RT) products showed that dietary fiber and yield increased gradually while whiteness decreased. In addition, texture profile analysis results revealed that MO enhanced the viscosity of RT, but decreased the hardness, cohesiveness and chewiness . SEM results revealed that MO (8%, 16%) could combine well with starch gel. Meanwhile, adding MO significantly increased the resistant starch (RS) of RT and decreased the predicted glycemic index (p GI). XRD and FTIR indicated that the addition of MO increased the crystallization area and changed the multi-scale structure. Therefore, the present study proposed a low-cost and safe method of reducing the particle size of okara, and presented the potential to change the physicochemical quality and starch digestion of rice tofu.
研究领域:
食品科学
·
营养学
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DOI
高影响因子
危险品化学品经营许可证（带存储）