Frontiers in Chemistry
·
2023
·
IF 5.5
Cui Ruizhi,Peng Changwei,Nie Guoliang,Sang Shihua,Ren Hongbao,Li Wu
In view of the composition characteristics of lithium, calcium and bromine rich in Nanyishan oil and gas field brine of western Qaidam Basin, Qinghai Province, as well as based on the results reported in relevant literature, the phase equilibrium relationship of ternary system LiBr-CaBr2-H2O at 298.15 K was studied by isothermal dissolution equilibrium method. The equilibrium solid phase crystallization regions, as well as the compositions of invariant point, in phase diagram of this ternary system were clarified. On basis of the above ternary system research, the stable phase equilibria of quaternary systems (LiBr-NaBr-CaBr2-H2O, LiBr-KBr-CaBr2-H2O and LiBr-MgBr2-CaBr2-H2O), as well as quinary systems (LiBr-NaBr-KBr-CaBr2-H2O, LiBr-NaBr-MgBr2-CaBr2-H2O and LiBr-KBr-MgBr2-CaBr2-H2O) were further carried out at 298.15 K. According to the above experimental results, the corresponding phase diagrams at 298.15 K were drawn, which revealed the phase relationship of each component in solution and the law of crystallization and dissolution, and meanwhile summarized changing trends. The research results of this paper lay a foundation for further research on the multitemperature phase equilibria and thermodynamic properties of lithium and bromine containing high-component brine system in later stage, and also provide basic thermodynamic data for guiding the comprehensive development and utilization of this oil and gas field brine resource.
研究领域:
化学
·
热力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED THERMAL ENGINEERING
·
2022
·
IF 6.465
Zhenghao Jin,Shuhong Li,Runfa Zhou,Mengkai Xu,Weixue Jiang,Kai Du
Adding nanoparticles can enhance the mass and heat transfer of basic fluid, improving the coefficient of performance(COP) of the absorption refrigeration system(ARS). However, there are few experimental studies on the effects of absorption pressure and temperature on the absorption performance of nanofluid in an actual ARS. Therefore, the TiO 2 nanoparticles are added to the NH 3 - H 2 O – LiBr working fluid. The difference in ammonia mass fraction between the inlet and outlet solution of the absorber (Δ ε ' a ) is compared with when the solution is absorbed saturated (Δ ε a ). The results indicate that the Δ ε ' a and system COP increase when the absorption temperature decreases, the absorption pressure increases, or the TiO 2 mass fraction increases. The ratio Δ ε ' a /Δ ε a is used to evaluate the absorption efficiency of the nanofluid. The positive effects of nanofluid on the absorption efficiency and COP slightly increase when absorption temperature increases, but decrease when the absorption pressure is greater than 0.31 MPa. For all of our test groups, the greatest improvement in absorption efficiency is 85 %, and the largest improvement in COP is 13.7 %.
研究领域:
热力学
·
制冷工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Mizeng Wang,Qiyu Liu,Xueqing Qiu,Run Tang,Zihan Zhang,Qiaozhi Ma
Glucan oligomers are unique chemicals with versatile value-added applications in agriculture and healthcare depending on their specific glycosidic linkages. Glucose glycosylation shows high efficiency in glucan oligomer production, but the formed glycosidic bonds are generally random, which limits its application. To address this issue, we employed an unacidified molten salt hydrate (MSH) of LiBr·3.2H2O as the reaction medium and glucose/disaccharides as the substrate. Results showed that a 66.6% yield of glucan oligomer can be produced from glucose with a high selectivity of 93.2%, suggesting limited byproduct degradation. When maltose was used as the substrate, the initial α(1 → 4) glycosidic bonds were well preserved. Maltose was effectively converted into an α-type glucan oligomer consisting of 79.9% α(1 → 4) and 20.1% α(1 → 6) glycosidic linkages. The kinetic analysis revealed that the α(1 → 4) bond has a high activation energy of 57.9 kJ/mol, ensuring its chemical stability in unacidified LiBr·3.2H2O conversion. The unacidified MSH reaction medium presents a possibility of enhanced and structure-tunable glucan oligomer production via a glycosylation method.
研究领域:
生物化学
·
食品科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xuanchun Wu,Guannan Zhou,Wenguan Liu,Yong Cao,Huiqin Yin,Zhongfeng Tang
Developing molten salt electrolytes with a low melting point and high electrical conductivity is critical for advanced thermal batteries. A novel LiCl-LiBr-KBr-KF (15.0-55.0-25.0-5.0 mol%) molten salt electrolyte was designed and validated through phase diagram calculation and experimental measurements. Compared with the LiCl-LiBr-KBr system, the melting point of the LiCl-LiBr-KBr-KF system decreased by 8.0 °C, the electrical conductivity increased by 0.25 S/cm, and the electrochemical window widened by 0.1 V at 500.0 °C. The mass loss of LiCl-LiBr-KBr-KF electrolytes at 830.0 °C is only 3.0 wt%, and its density at 500.0 °C is 2.36 g/cm 3 , i.e., 0.07 g/cm 3 higher than that of LiCl-LiBr-KBr. Practically, its lower melting point can reduce the activation energy of thermal batteries. Meanwhile, enhanced electrical conductivity and Li + diffusion coefficient can improve the power density and response speed of the thermal battery. LiCl-LiBr-KBr-KF electrolyte exhibits superior comprehensive performance. This result not only enriches the high-performance molten salt materials but also provides a novel strategy for designing next-generation thermal battery electrolytes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Yongmei Xuan,Xianyu Ding,Neng Gao,Yaqi Ding,Xin Meng,Guangming Chen
1-Ethyl-3-methylimidazolium chlorine ([Emim]Cl) and 1-ethyl-3-methylimidazolium bromide ([Emim]Br) as an additive to working fluid [lithium bromide aqueous solution (H2O/LiBr) and lithium chloride aqueous solution (H2O/LiCl)] of absorption cycles were proposed. The vapor pressure of H2O + LiCl + [Emim]Cl (mass ratio LiCl/[Emim]Cl = 2) in the temperature from 314.79 to 435.48 K, H2O + LiCl + [Emim]Br (mass ratio LiCl/[Emim]Br = 2) in the temperature from 317.62 to 431.27 K, and H2O + LiBr + [Emim]Cl (mass ratio LiBr/[Emim]Cl = 2) in the temperature from 303.10 to 409.91 K was measured by the boiling point method. The mass fractions of the absorbent were from 0.30 to 0.60. The experimental data were regressed using the Antoine-type equation, and the average absolute relative deviation (AARD %) between the experimental data and calculated values of three systems was 0.44, 0.51, and 0.54%. Compared with that of the previously reported ionic liquids, ([Emim]Ac) as an absorbent for LiBr + H2O, vapor pressure of these four systems follows the order LiCl + [Emim]Cl + H2O < LiCl + [Emim]Br + H2O < LiBr + [Emim]Cl + H2O < LiBr + [Emim]Ac + H2O. The proposed ternary systems have better water affinity and can be promising alternative working fluids in the absorption cooling system.
研究领域:
化学工程
·
热力学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2026
·
IF 2.5
Wang Zhao,Jiansong Chen,Haishun Du,Zhiqiang Pang,Weiqi Wei,Xuejun Pan
Furfural is a pivotal intermediate in the biomass conversion. Therefore, the production of furfural from xylose or xylose-rich biomass has received extensive attention. Herein, a series of boron phosphate solid acid catalysts (BPs) were synthesized by self-assembly and high-temperature calcination, and used for the production of furfural from xylose or xylose-rich biomass. The results showed that the synthesized BPs was spherical nanoparticles and containing both Lewis acid and Brønsted acid sites, which was excellent for xylose conversion to furfural. The maximum furfural yield of this work was 82.8 % and achieved through 95.7 % xylose conversion by using 20 mg BP 1.25 at a reaction temperature of 130 °C for 120 min with a LiBr⋅3H 2 O/dichloromethane (DCM) biphasic system. Noteworthy, the recycling experiments indicated that both the BP 1.25 catalyst and the LiBr⋅3H 2 O can be reused at least four times with a furfural yield remaining ≥61.7 %. Last but not least, the prepared BP 1.25 catalyst also displayed high efficiency for xylose-rich natural biomass such as corncob and bagasse conversion into furfural. The work not only developed a new system for easy conversion of xylose into furfural, but also realized the high yield production of furfural from natural biomass without components separation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Yang-Dian-Dian Wang,Shi-Hua Sang,Han-Zhong Zhang,Ling-Xuan Wang
The solid–liquid phase equilibria of the ternary system LiBr–Li2SO4–H2O at 273.15, 288.15, and 308.15 K were investigated by the isothermal dissolution equilibrium method. The equilibrium solid phases were identified by X-ray powder crystal diffraction. The isothermal phase diagrams of the ternary system at different temperatures were drawn in detail. The equilibrium phase diagrams of the ternary system at 273.15, 288.15, and 308.15 K have one invariant point, two univariate curves, and two crystallization fields (corresponding to LiBr·2H2O and Li2SO4·H2O), respectively. The results show that LiBr has a strong salting-out effect on Li2SO4, and the solubilities of LiBr will be greatly improved with an increase in temperature. Furthermore, multiple linear regression and programming analysis are used to fit the single salt parameters (β(0), β(1), and Cφ) and the mixed ion interaction parameters (ψLi+,Br–,SO42–) of lithium salt at 288.15 and 308.15 K. The Pitzer model and particle swarm optimization (PSO) were used to predict the solubilities in the ternary system at multitemperatures, and the phase diagrams of calculation and experiment are drawn accordingly. The experimental results and model predictions are in good agreement, indicating that fitted ion interaction parameters in this work of the Pitzer model have good applicability.
研究领域:
化学热力学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Mingyong Jia,Fei Chen,Xipeng Tan,Yaling He,Yueqi Wu,Qiang Shen
The high-temperature corrosion behavior of an AlN/Mo functionally graded material (FGM) under the Li/LiF-LiCl-LiBr vapor has been investigated. It is suggested that the Li vapor diffuses along the AlN and AlN/Mo grain boundaries and enters the interior of adjacent AlN grains, leading to the disintegration of AlN grains and subsequent failures. The 3D Mo networks are barely corroded, thus preventing cracking that may occur due to the inconsistent deformation inside the FGM. This work unravels the high-temperature corrosion mechanisms for the AlN/Mo FGM. Meanwhile, the operating temperature threshold for the liquid metal batteries employing Mo/AlN/Mo seals is determined to be ∼ 600 °C.
研究领域:
材料科学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Refrigeration
·
2019
·
IF 3.177
Qing Cheng,Wang Pei
As different liquid desiccants show different dehumidification and operation characteristics, the comprehensive performance comparison between two liquid desiccants (LiCl and LiBr aqueous solutions) was conducted in this paper. The electronic conductivity of the LiBr aqueous solution was experimentally investigated and the electronic conductivity model of the LiBr solution was acquired. Compared with the LiCl solution, the LiBr solution has higher electronic conductivity within the concentration range of 20–40% and the temperature range of 20–60 °C, which means the ED regenerator using LiBr solution has lower electric resistance. The increase of the liquid desiccant concentration is beneficial to the moisture removal rate but harmful to the whole system COP and dehumidification efficiency, while the effect of the liquid desiccant temperature is opposite. Within the liquid desiccant temperature range of 20–30 °C, the whole system COP varies among 1 and 2.8 for the LiCl solution with the concentration of 38% at the exit of the ED regenerator, and it is among 2.5 and 5.8 for the LiBr solution with the concentration of 55% after regeneration. Using the LiCl solution can give the system the better dehumidification potential, while using LiBr solution can help the system to acquire the better whole performance and economy.
研究领域:
热能工程
·
暖通空调
·
化学工程
·
能源利用
·
环境控制技术
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2022
·Vol. 4
·期 19
·4169-4174
·
IF 5.598
Yi Gao,Shaofeng Liang,Shuangliang Zhao,Wei Gao,Zequan Li,Muqun Wang,Hong Li,Xiangning He,Riyao Cong,Hailin Diao,Chuwang Su,Xiaoying Xie
The emergence of cooling technology has brought about huge social benefits to society, but it is also accompanied by the serious problem of energy consumption. In countries close to the equator, intense solar radiation is accompanied by unbearable high temperatures and strong ultraviolet radiation. Therefore, we prepared a simple hydrogel with good evaporative cooling, which can work continuously and has good UV absorption, to solve the indoor cooling and UV radiation problems. Polyacrylamide (PAM) in the hydrogel provides a mechanically strong backbone, and polyethylene glycol (PEG) slows water loss and provides the hydrogel with the ability to reflect infrared light. Lithium bromide (LiBr) is a highly efficient water vapor absorbent, which can provide the hydrogel with water regeneration capability. Carbon dots (CDs) can provide excellent UV absorption for hydrogels, and CDs (4.28 kJ kg−1 K−1) have a higher specific heat capacity than water (4.20 kJ kg−1 K−1), which can store more heat for a better indoor cooling effect. The composite hydrogel has a good prospect of application in the windows of residential and high-rise buildings.
研究领域:
材料科学
·
环境科学
·
化学工程
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2025
·Vol. 55
·期 2
·290-305
·
IF 1.3
Cui Rui-Zhi,Nie Guo-Liang,Ren Hong-Bao,Yang Qiu-Ye,Li Wu
Based on mother liquor rich in lithium, strontium and bromine obtained from the brine of underground oil–gas field in Qaidam Basin after pre-treatment, the isothermal dissolution equilibrium method was used to study the stable solid–liquid equilibria and phase diagrams of the quinary system LiBr − NaBr − KBr − SrBr 2 − H 2 O and its subsystems at 298.15 K. The solubilities of solids in each system were determined, respectively, and the equilibrium solid phases were determined. In order to clearly reflect the regularities and characteristics of phase equilibria of multi-component systems, the corresponding phase diagrams were also plotted and analyzed. The Pitzer model for the quinary system was parameterized by using relevant experimental thermodynamic data. The solubilities of solids in this quinary system and its subsystems were calculated and compared with experimental results. The results not only help to reveal the thermodynamic behavior of relevant bromides in the process of brine concentration, but also provide some theoretical support for the comprehensive utilization of its brine resources.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zihao Ma,Ying Han,Xinyue Xing,Hongwei Zhu,Qingyu Wang,Xing Wang
As a novel nanoporous carbon material with high porosity, large specific surface area, excellent electrical conductivity and high temperature resistance, carbon aerogels have broad application prospects in the fields of catalyst carriers, energy storage and adsorption materials. In this work, the hydrophobic micro-convex rough interface cellulose carbon aerogels (CCAs) were fabricated via carbonization of cellulose-lithium bromide (LiBr) molten salt hydrate gelled system. The prepared CCAs shows a low density (0.016–0.023 g/cm 3 ), high porosity (98.9–99.2 %), superior hydrophobicity (water contact angle over 135°) and excellent absorption of different oils and organic solvents . The absorption ability of CCAs 1.0-T800 for different oils and organic solvents can be 25–55 times its own weight. More importantly, the CCAs adsorbent can be reused by simple absorption/distillation method and still kept high-efficiency oil absorption capacity and excellent hydrophobicity after 5 absorption/elution cycles, displaying recyclability and robust stability. This study provides a green and facile way to fabrication of cellulose II carbon aerogels for application in spilled oil recovery, and exhibited highly promising as an economical, efficient and safe adsorbent for wastewater treatment .
研究领域:
材料科学
·
环境科学
✓ 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）