DOKLADY PHYSICAL CHEMISTRY
·
2025
·Vol. 520
·期 1
·1-10
·
IF 1.5
Xingbing Yang,Zhang Tingting,Zhu Jing,Wu Qian,Zhang Qin,Li Jingyi,Jiang Tingting,Xiao Qin
In this work, the isothermal solution equilibrium method was used to examine the phase equilibrium of a ternary LiCl–LiBr–CH 3 OH system at 273 and 323 K. The solubilities of LiCl and LiBr in CH 3 OH at different temperatures were measured by chemical analysis. The chemical composition of the equilibrium solid phase was determined via the wet slag method combined with X-ray diffraction. Thus, the corresponding phase diagram was created, and the LiCl–LiBr–CH 3 OH and LiCl–LiBr–H 2 O ternary systems were compared at different temperatures. The results showed that the phase diagram characteristics of the LiCl–LiBr–CH 3 OH ternary system at 273 and 323 K were similar, with a saturation point, two univariable solubility curves and two solid phase crystallization zones; these zones represented the Li(Cl,Br) solid solution crystallization zone and LiCl single salt crystallization zone. The single salt of LiCl can be separated using crystallization filtration. LiBr has a salt-out effect on LiCl, but LiBr cannot be obtained. With increasing temperature, the contents of LiCl and LiBr at the saturation point of the LiCl–LiBr–CH 3 OH ternary system increase, and the solubilities of LiCl and LiBr in methanol gradually increase.
✓ 已验证
DOI
高影响因子
ENERGY
·
2018
·
IF 4.968
Akram Entezari,T.S. Ge,R.Z. Wang
The desiccants made by confined salt in a porous matrix (CSPM) were proposed in the 1990s. Profiting off of a high sorption capacity and a low regeneration temperature made this field very interesting research topic. In absorption refrigeration cycles , adopting multi salts has been investigated widely. LiCl and LiBr are known for their high water adsorption capacity . The combinations of these two salts might be a tool for an intentional modification of CSPMs too. In this study, different ratios of these two salts were impregnated into silica gel pores. The textural properties, water sorption isotherms, and kinetics were analyzed. Four mathematical models were applied for estimating dynamic sorption coefficients. SIM and LDF were well-fitted to describe kinetics. The results showed that impregnated salts molar ratios affect the sorption characteristics. Adding a small amount of LiBr to the LiCl composites intensifies the sorption capacity up to 5.5% while adding LiCl to LiBr decrease this parameter by 12.7%. Besides, a mathematical simulation was used to estimate their performance in a real desiccant cooling heat exchanger . For a standard cooling and dehumidification conditions, the simulation results showed that the binary salt composites might improve the dehumidification if a proper salts ratio was selected.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2022
·Vol. 10
·期 5
·823
·
IF 3.352
Bin Li,Xinjun Jing,Junsheng Yuan
The phase equilibria of the reciprocal quaternary system LiBr-Li2SO4-KBr-K2SO4-H2O and its ternary sub-systems LiBr-Li2SO4-H2O and KBr-K2SO4-H2O at 308.15 K were studied using the isothermal dissolution equilibrium method. Then, the solubility data of the equilibrium solutions were collected, and the phase diagrams were plotted. The phase diagrams of the ternary sub-systems at 308.15 K were compared with those at other temperatures. This study found that the phase diagram of the LiBr-Li2SO4-H2O system at 308.15 K consisted of an invariant point, two solid-phase crystallization regions of Li2SO4·H2O and LiBr·2H2O, and their corresponding solubility curves. The system generated two hydrated salts, which belonged to the hydrate type I phase diagram. The phase diagram of the KBr-K2SO4-H2O system at 308.15 K consisted of an invariant point, two univariant solubility curves, and two solid-phase crystallization regions of KBr and K2SO4, and no solid solution and double salts were formed. Thus, it belonged to a simple co-saturation type phase diagram. In the LiBr-Li2SO4-KBr-K2SO4-H2O system, K2SO4·Li2SO4double salt formed at 308.15 K, and the phase diagram consisted of three invariant points, five crystallization regions, and seven univariant solubility curves.Keywords:lithium bromide;potassium bromide;lithium sulfate;potassium sulfate;phase equilibrium
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2018
·
IF 2.447
Hao Tang,Yunfeng Du,Yingru Li,Ming Wang,Huaisheng Wang,Zhenliang Yang,Bingqing Li,Rui Gao
The electrochemistry of UBr 3 was studied on W working electrodes in LiBr-KBr-CsBr eutectic salt at 623 K. The U(III)/U (0) redox reaction was evaluated with respect to its electrochemical behavior, diffusion and electrocrystallization properties. According to cyclic voltammetry and square wave voltammetry , the reduction of U(III) ions to U (0) metal is a one-step three-electron reaction and the oxidation of U(III) ions is an one-electron transferred reaction. Cyclic voltammograms at varied scan rates show that U(III)/U (0) redox reactions are quasi-reversible. Chronopotentiometry and Sand's equation were used to determine the diffusion coefficients of U(III) ions. The nucleation mechanisms of uranium metal deposited on W substrates with different UBr 3 concentrations were predicted by using Scharifker-Hill model, which shows that the nucleation and growth mode changes from progressive mechanism to instantaneous mechanism with an increasing concentration of UBr 3 in the salt. At 623 K, potentiostatic electrodeposition was conducted to prepare mass uranium. The current-time evolution curve indicates that the actual surface area of electrodeposits keeps stable. Furthermore, the macroscopic appearance and microcosmic morphology show compact structure, rather than dendrites. Bulk uranium metal was further analyzed by inductive coupled plasma atomic emission spectrometer and X-ray diffraction, which indicate that the compact uranium is high-purity metal.
研究领域:
电化学
·
核材料科学
·
熔盐化学
·
电冶金
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Zhonglei Huang,Guang Yu,Chao Liu,Meiyan Wu,Yanjun Tang,Bin Li,Hui Peng
The development of sustainable and effective pretreatment methods to improve the accessibility of cellulose is of vital importance for its utilization. Herein, a novel high-efficiency pretreatment method based on lithium bromide trihydrate (LBTH) was established, which realized the fast improvement of cellulose accessibility under ambient conditions without dissolution of cellulose. The cellulose I structure of microcrystalline cellulose (MCC) was transformed into amorphous structure just within 5 min of LBTH pretreatment, and the crystallinity was reduced from 79.1 to 19.9%. After pretreatment for 30 min, the BET surface area of MCC increased from 2.1 to 125.9 m 2 /g. Particularly, the pretreated cellulose could be near-completely saccharified to glucose (98.3%) with ultra-low enzyme dosage (2.5 mg protein/g-glucan) just within 24 h, while the conversion of untreated MCC under the same conditions was only 16.7%. Additionally, this non-dissolving pretreatment is beneficial to the separation and recycling of LBTH, guaranteeing a clean and sustainable process.
研究领域:
生物化学
·
材料科学
·
可持续能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Jian Zhang,Jin Huang,Ruxia Liu,Guoqiang Luo,Qiang Shen
Immersion tests of AlN in LiF-LiCl-LiBr-Li salt have been performed at 500 °C to study the corrosion behaviour of AlN. The results show that AlN initially corroded at a higher rate (2⋅10 −5 mg/(mm 2 ⋅h)) during 0−50 h than during 50−300 h (6⋅10 -6 mg/(mm 2 ⋅h)) because the formation of an alumina corrosion layer protected the AlN from further corrosion. The addition of metallic Li at low concentrations (<0.1 wt. %) to the molten salt inhibited the corrosion of AlN by preferentially depleting oxygen impurities, while Li at high concentrations (>0.1 wt. %) accelerated corrosion by reacting with YAG in AlN.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Liang Chen,Du Chunhua,Wu Xianli,Wang Ju,Xu Jie,Hu Pengyu,Qu Wangda
In order to enhance the valorization of corncob, corncob-based solid acid catalysts were prepared via the method of partial carbonization followed by sulfonation. The prepared acid catalysts were either derived from raw corncob (hemicellulose, cellulose, and lignin), or its residues after different pretreatments, i.e., furfural residue (cellulose and lignin) and hydrolysis residue (humins and lignin), to investigate the components’ effect on the performance of solid acid. These catalysts were characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), nitrogen adsorption/desorption analysis, scanning electron microscope (SEM), elemental analysis, and acid–base titration. The analysis results suggested that the solid acid (Catalyst-3) derived from the hydrolysis residue had the best performance, with a BET surface area of 338.23 m 2 g −1 and total acid densities of 6.43 mmol g −1 . This results indicated –SO 3 H groups were loaded onto the catalyst successfully. The catalytic activity was tested by cellulose hydrolysis in lithium bromide trihydrate solution (LBTH) system. The yield of glucose was as high as 80.1% at the temperature of 110 °C for 10 h. Moreover, the prepared solid acid had the advantages of easy separation, mild reaction, and producing less by-products compared with traditional liquid acids. This work provides a promising strategy for corncob waste utilization and cellulose efficient hydrolysis, which is of great significance for biomass valorization and conversion.
研究领域:
化学工程
·
材料科学
·
生物技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Xintai Xie,Jinbiao Chen,Xuanyi Chen,Zhicong Shi
The urgent need for high-energy–density rechargeable batteries is driving lithium (Li) metal as a promising anode material. However, the conventional solid electrolyte interface (SEI) on lithium metal suffers from elevated interfacial impedance, poor mechanical properties, and non-uniform Li + flux. Previously, LiF has been proven to be an effective component of the SEI protecting lithium metal. However, this is a rarely reported application of LiCl and LiBr in SEI. Herein, we design SEI containing lithium halide in different ratios (LiF 0.8 Cl 0.1 Br 0.1 , LiF 0.33 Cl 0.33 Br 0.33 , LiCl, LiBr) to investigate the action laws of lithium halide in SEI. It has been shown that the performance of SEI containing lithium halide against lithium anode increases with the LiF content in the SEI. The higher the proportion of LiF in SEI, the better the cycle life and stability of Li-Li symmetric cells, and the higher the initial capacity and the capacity retention of LFP-Li full cells. The symmetric cell with LiF 0.8 Cl 0.1 Br 0.1 @Li has the smallest average polarization voltage (about ± 30 mV) and long cycle life of up to 1000 h. LiFePO 4 ||LiF 0.8 Cl 0.1 Br 0.1 @Li cells have the highest initial capacity (127.4 mAh/g), and still had 83.6 % capacity retention after 1000 cycles at 2C.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Zhi-Chao Wang,Xin Cai,Kai Li,Yue-Yuan Ye,Zhao-Xia Zhang,Yun-Quan Liu,Duo Wang,Shui-Rong Li
In this work, a suitable solvent (Lithium Bromide Hydrate) was selected and used for the efficient dissolution and carbonization of biomass for the preparation of carbon spheres directly from wood powders by hydrothermal carbonization (HTC), which was so far the first successful attempt of making carbon spheres directly from woody biomass. The impacts of the preparation conditions on the yield and morphology of carbon spheres were carefully studied, and it was found that the yield and degree of carbonization of carbon spheres were positively correlated with the temperature and reaction time. The optimal operation conditions were determined as 170 °C, reaction time 5 h and LiBr concentration 65 wt%. And the produced carbon spheres have an average particle size of 603 nm with a yield of 22.4%. The characterization of carbon spheres revealed that the prepared nanoparticles had excellent spherical morphology and multifunctional groups, which led to a better surface reactivity than the raw material itself. Moreover, levulinic acid (LA) and 5-hydroxymethylfurfural (5-HMF) were found in the liquid phase of the reaction products, indicating the furan derivatives were formed in the HTC process , which demonstrated a great potential of biomass valorisation with this innovative process.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Dan Li,Shanshan Li,Lingzong Meng,Tianlong Deng,Yafei Guo
The solubility data, composition of the solid solutions, and refractive indices of the LiCl–LiBr–H2O and CaCl2–CaBr2–H2O systems at 288.15 K were studied with the isothermal equilibrium dissolution method. The solubility diagrams and refractive index diagrams of the two systems were plotted at 288.15 K. There is no invariant point, one univariant solubility curve saturated with solid solution, and one crystallization field of the solid solution in the phase diagrams. The two systems belong to the solid solution type, and no double salts formed in the systems. The refractive indices calculated with an empirical equation agree well with the experimental data. By combining the composition equations and solubility equilibrium constant equations of the solid solutions, the solubilities of the two systems at 288.15 K were calculated on the basis of the Pitzer and Harvie–Weare models. The calculated solubilities agree well with the experimental results.
研究领域:
化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Kaiyu Zhao,Yafei Guo,Dan Li,Lingzong Meng,Tianlong Deng
Isopiestic molalities and water activities for the commercial absorption refrigerants LiBr and SrBr 2 at 288.15 K were accurately measured using an improved isopiestic method. And the solubilities for the absorption refrigeration systems were determined by the isothermal dissolution equilibrium method, meanwhile, the refractive indices and densities were measured. The Pitzer and HW model was used to correlate the measured water activities and solubilities, simulate the thermodynamic properties and predict the data in the phase equilibrium process for the absorption refrigeration systems, and the predicted data agreed well with the experimental solubilities. On the basis of the Pitzer ion-interaction parameters and solubility product constant ( K sp ) obtained in this work, the ion-interactions between alkali metal ions with Sr 2+ and phase equilibrium behaviors were illustrated on the molecular level, which could give an essential guide for the designing of absorption refrigeration system.
研究领域:
化学工程
·
制冷技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Guo-liang Nie,Rui-zhi Cui,Zhong Liu,Wu Li
In view of the composition characteristics of lithium, calcium, and bromine rich in Nanyishan oilfield water of the Qaidam Basin, Qinghai Province, the phase equilibrium relationships of quaternary system LiBr–NaBr–KBr–H2O and its ternary subsystems LiBr–NaBr–H2O and LiBr–KBr–H2O at 348.15 K were studied by the isothermal solution equilibrium method, and the equilibrium solid-phase crystallization regions and composition of each invariant point in each system were determined. The results show that there is no complex salt or solid solution in ternary systems LiBr–NaBr–H2O and LiBr–KBr–H2O at 348.15 K, and the phase diagram contains only one invariant point, two isothermal univariate curves, and two equilibrium solid-phase crystallization regions. The quaternary system LiBr–NaBr–KBr–H2O also has no formation of complex salt or solid solution, and the phase diagram contains only one invariant point, three isothermal univariate curves, and three equilibrium solid-phase crystallization regions. Meanwhile, the phase equilibrium relationships and change laws of each component of the above-mentioned systems at different temperatures were compared and discussed.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）