ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Yidong Zhang,Wangfang Deng,Chao Liu,Fei Yan,Meiyan Wu,Qiu Cui,Stefan Willför,Chunlin Xu,Bin Li
Dialdehyde nanocellulose (DANC), obtained via periodate oxidation, has been widely used in foods, cosmetics, and biomedical fields due to its unique characteristics. However, the high-crystallinity and tight structure of cellulose retards the efficiency of periodate oxidation for producing DANC. Herein, a novel sustainable and clean approach with less energy consumption and low cost was developed through LiBr·3H2O (LBTH) non-dissolving pretreatment, which can shorten the oxidation time of the followed periodate oxidation and reduce the oxidant consumption. It was shown that the cellulose Iβ structure of hardwood dissolving pulp (HDP) was largely transformed into an amorphous structure after LBTH non-dissolving pretreatment for 30 min, and the corresponding crystallinity of HDP was reduced from 83.2 to 48.7%. After pretreatment for 60 min, the aldehyde group content of the obtained DANC increased by around 30% compared to the control without pretreatment while the operational cost was reduced by 45%. Moreover, the fabricated DANC showed strong antibacterial activity against both Escherichia coli and Bacillus subtilis. LBTH was recovered and reused, and the pretreatment effectiveness was also maintained. This study provides a sustainable, cost-effective, and clean approach for the preparation of DANC and will promote the application of cellulose nanomaterials.
研究领域:
材料科学
·
化学工程
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Weiyu Xia,Lupeng Shao,Chao Wang,Yu Liu,Xianhai Zeng,Feng Xu
Lignocellulose as an appealing renewable carbon resource holds great potential to produce high-value-added products. The implementation of an integrated pretreatment process that enables effective fractionation and targeted valorization is crucial for ensuring the feasibility of future biorefinery scenarios. In this study, a stepwise approach using formic acid (FA)–LiBr molten salt hydrate (LiBr MSH) pretreatment was successfully developed for producing high yields of xylose, glucose, glucan oligomers, and less-condensed lignin from poplar. Results showed that FA pretreatment removed the most hemicellulose, releasing a high yield (71.63%) of xylose at 160 °C for 1 h. Subsequent acidified LiBr MSH pretreatment at 100 °C for 0.5 h resulted in a remarkably high cellulose degradation rate of 84.55%, yielding 41.87% glucose and 42.68% glucan oligomers. Meanwhile, 95.57% purity of lignin with abundant uncondensed moieties (i.e., β-O-4 bonds, Hibbert’s ketones) was obtained. The proposed integrated FA–LiBr MSH pretreatment exhibited great potential as an efficient deconstruction strategy in the current biorefinery scenario.
研究领域:
生物能源
·
化学工程
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Rui-Zhi Cui,Guo-Liang Nie,Hong-Bao Ren,Qiu-Ye Yang,Wu Li
The underground brine in the Sichuan basin is not only widely distributed but also of excellent quality, which has broad prospects for comprehensive development and utilization. Due to the complex geological structure and relatively high air humidity in the Sichuan basin, salt field technology cannot be used for the separation and enrichment of brine resources. Therefore, forced evaporation by external energy can only be used to achieve the purpose of the preliminary separation of salts. In order to realize effective development and utilization of this underground brine resource, it is necessary to carry out multitemperature phase equilibrium research from ambient to high temperature for this brine system. Here, we take lithium-, potassium-, and bromine-rich underground brine in the Sichuan basin as research object and use the isothermal dissolution equilibrium method to research the stable phase equilibria of two ternary systems (LiBr–NaBr–H2O and LiBr–KBr–H2O) under temperature conditions of 373.15, 398.15, and 423.15 K. Based on the experimental results, the corresponding phase diagrams were drawn, and the phase diagrams under different temperature conditions were compared to reveal the phase equilibrium relationship and crystallization–dissolution rules of each component in the above two systems under multitemperature conditions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yongmei Xuan,Kaile Fang,Bosheng Duan,Neng Gao,Guangming Chen
Ionic liquids (ILs), 1-ethyl-3-methylimidazolium iodine [Emim]I and 1,3-dimethylimidazolium iodine [Dmim]I, were proposed as a novel potential solvent in traditional bromide aqueous solution (H2O + LiBr) in absorption refrigeration cycles. The vapor pressure data of two ternary systems H2O + LiBr + [Emim]I (mass ratio LiBr/[Emim]I = 4) at temperatures from 350.78 to 414.19 K and H2O + LiBr + [Dmim]I (mass ratio LiBr/[Dmim]I = 2) at temperatures from 350.69 to 409.63 K were reported by the boiling point method. The absorbent mass fractions are from 0.30 to 0.57 and 0.30 to 0.60, respectively. The measured data were correlated by using the Antoine-type equation, and the average absolute relative deviation (AARD %) between measured data and regression data was 0.54 and 0.39%. Compared with the vapor pressures of IL mixtures with the same organic cation, the vapor pressure order is LiBr + [Emim]I + H2O < LiBr + [Emim]Cl + H2O < LiBr + [Emim]Ac + H2O and LiBr + [Dmim]I + H2O < LiBr + [Dmim]Cl + H2O < LiBr + [Dmim]BF4 + H2O. Under experimental conditions, the hydrophilic properties of the iodine anion (I–) are better than those of the chlorine anion (Cl–), acetate anion (Ac–), and tetrafluoroborate anion (BF4–). Lower vapor pressure means stronger moisture absorption property. The proposed ternary mixtures have lower vapor pressures and can improve the absorption effect of the absorption system.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Xizhuo Jiang,Wenjie Xiong,Yun Li,Danxing Zheng,Xiao Wang,Lin Shi
This research introduced two new absorption working pairs which have better energy storage performance than LiBr + H2O and lower cost than other working pairs in literature. The two working pairs are both quaternary systems: LiBr + LiNO3 + LiCl + H2O and LiBr + LiCl + 1,3-propanediol + H2O. Vapor pressures of the two quaternary systems were measured with the boiling point method at temperatures from (318.07 to 443.02) K and (324.78 to 419.40) K, respectively, with the both mass fractions of absorbent species from 0.40 to 0.65. The experimental data agree well with the calculated data from the Antoine-type equation. Compared with traditional working fluids of absorption cycle and ionic liquids, results show that the two quaternary systems studied in this work have lower vapor pressures, which will benefit energy release process in absorption energy storage/release systems.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Xing-Xing Zeng,Shi-Hua Sang,Xiao-Yun Qi,Xiao-Feng Guo,Rui-Zhi Cui
Aiming at the composition of underground brines in the Sichuan Basin of China, stable phase equilibria in quaternary systems LiBr–NaBr–SrBr2–H2O and LiBr–KBr–SrBr2–H2O at 288.15 K are studied using the isothermal dissolution equilibrium method. The solubilities of salts in the quaternary systems listed above are measured, and the corresponding equilibrium solid phases are identified using X-ray powder diffraction. As a result, the corresponding phase diagrams of the two quaternary systems are plotted, respectively. In the two stable phase diagrams, there is no solid solution or complex salt at 288.15 K. For the quaternary system LiBr–NaBr–SrBr2–H2O, there are two invariant points, five univariate curves, and four solid crystallization regions, which are LiBr·2H2O, NaBr, NaBr·2H2O, and SrBr2·6H2O, respectively, of which LiBr·2H2O has the smallest crystallization field, indicating that its solubility is the largest and it is the hardest to be precipitated from the saturated solution. There are one invariant point, three univariate curves, and three solid crystallization fields, corresponding to LiBr·2H2O, KBr, and SrBr2·6H2O in the quaternary system LiBr–KBr–SrBr2–H2O, respectively. The experimental results show that the solubilities of salts KBr, NaBr, and SrBr2 in the saturated solution decrease with the increasing concentration of LiBr, which indicates that LiBr has a strong salting out effect on KBr, NaBr, and SrBr2 in the solution.
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 CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Guo-Liang Nie,Rui-Zhi Cui,Wu Li
According to the composition characteristics of lithium, potassium, bromine, and other resources rich in the salt lake brine of the Qinghai–Tibet Plateau, the phase equilibria of the quaternary system LiBr-NaBr-KBr-H2O and its ternary subsystem LiBr-KBr-H2O at 323.15 K are studied by an isothermal dissolution equilibrium method. The solubility of each system in equilibrium solution at the corresponding temperature is measured, and the corresponding phase diagrams are drawn according to the phase equilibrium experimental data. The results show that there is no complex salt or solid solution in the ternary system LiBr-KBr-H2O at 323.15 K. The phase diagram contains one invariant point (E1), two univariate curves (AE1 and BE1), and two equilibrium solid crystallization regions (corresponding to LiBr·H2O and KBr), belonging to the simple cosaturated type. The quaternary system LiBr-NaBr-KBr-H2O also has no formation of complex salt and solid solution. The phase diagram contains two invariant points (F1 and F2), five univariate curves (E1F1, E3F1, F1F2, E2F2, and E4F2), and four equilibrium solid-phase crystallization regions (corresponding to LiBr·H2O, KBr, NaBr·2H2O, and NaBr). At the same time, to further explain the phase equilibrium relationship of each system at different temperatures and the change rule of each component, comparison and discussion are carried out.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 6
·1234-1240
·
IF 1.063
Cui Ruizhi,Li Wu,Dong Yaping,Li Jun
The stable phase equilibria of quaternary systems LiBr-NaBr-MgBr 2 -H 2 O and LiBr-KBr-MgBr 2 -H 2 O at 298.15 K were studied by both experimental measurement(isothermal solution saturation method) and theoretical prediction(Pitzer model). The solubilities of the saturated solution have been determined experimentally and two stable phase diagrams and relevant water diagrams of the two quaternary systems were obtained. Results show that quaternary system LiBr-NaBr-MgBr 2 -H 2 O is hydrate II type as NaBr and NaBr·2H 2 O coexistence. Its phase diagram consists of only one invariant point, four univariant curves, and five crystallization fields. The quaternary system LiBr-KBr-MgBr 2 -H 2 O is a complex type as the double salt KBr·MgBr 2 ·6H 2 O formed. In addition to this double salt, the three single salts LiBr·2H 2 O, KBr and MgBr 2 ·6H 2 O also crystallize. In this paper, the solubilities of phase equilibria in above quaternary systems were also calculated by the Pitzer’s electrolyte solution model. All the needed parameters can be obtained from the literature or be fitted by experimental data. On the Basis of the experimental and calculated results, the phase diagram of the quaternary system was plotted for comparison. It shows that the calculation results are consistent with the experimental ones.
研究领域:
化学热力学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Li Jing,Zheng Danxing,Fan Lihua,Wu Xianghong,Dong Li
The aim of this work is to investigate improving the effects for adding ionic liquids (ILs) to the working fluids of absorption cycle, lithium bromide aqueous solution (H2O + LiBr), and lithium chloride aqueous solution (H2O + LiCl). 1,3-Dimethylimidazolium chloride ([Dmim]Cl) and 1,3-dimethylimidazolium tetrafluoroborate ([Dmim]BF4) were selected to be additives. The vapor pressure data were measured for the H2O + LiBr + [Dmim]Cl system (LiBr/[Dmim]Cl mass ratio = 3), H2O + LiBr + [Dmim]BF4 system (LiBr/[Dmim]BF4 mass ratio = 2), H2O + LiCl + [Dmim]Cl system (LiCl/[Dmim]Cl mass ratio = 2), and H2O + LiCl + [Dmim]BF4 system (LiCl/[Dmim]BF4 mass ratio = 2) by means of the boiling point method, at temperatures from (303.60 to 439.42) K and the mass fraction of absorbent species from 0.20 to 0.70, respectively. The Antoine-type equation was used to correlate the experimental data of the ternary systems, and the agreements with the experimental data were excellent; that is, the average absolute relative deviations (ARDs) for pressure between experimental and calculated values were 1.05 %, 0.75 %, 0.63 %, and 0.92 % for the systems. Compared with traditional working fluids of absorption cycle, H2O + LiBr and H2O + LiCl, the promising results show that four ternary systems investigated in this work might be used as alternative working fluids to improve the performances of absorption cycles and liquid desiccant dehumidification systems.
研究领域:
热力学
·
制冷与空调
·
化学工程
·
离子液体应用
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Nan Zhang,Fei Ding,Shihui Yu,Kongying Zhu,Huan Li,Weiguo Zhang,Xingjiang Liu,Qiang Xu
Owing to the expanding function of Li-ion transmission channels, it is important to explore the doping effects of different compounds into sulfide solid electrolytes to improve their electrochemical performances. However, it is hard to characterize the doping behaviors within sulfide solid electrolytes with low crystallinity and poor stability just by conventional crystallography analytical methods. In this work, the dielectric spectrum testing combined with other analytical methods, such as 7Li solid-state nuclear magnetic resonance, X-ray photoelectron spectroscopy, and the electrochemical method, have been applied to investigate the dual-doping behaviors of WS2 and LiBr within Li7P3S11 glass-ceramic electrolytes. This research method can not only evaluate the internal acting effect between the skeleton of sulfide solid electrolytes and the migrating kinetics of Li ions but also explore the capacitance at the interfaces of LiCoO2/sulfide solid electrolytes. The experimental results show that the number of Li ions with fast transport velocity within Li2S-P2S5-based solid electrolytes has been increased. Meanwhile, the interfacial capacitances between Li2S-P2S5-based solid electrolytes and the LiCoO2 cathode have decreased after dual-doping of WS2 and LiBr, indicating a synergetic effect for the doped Li7P3S11 glass-ceramic electrolytes in terms of the ionic conductivities and interfacial compatibilities. This work may provide a novel analytical approach to explore both the diffusion kinetics and interfacial behaviors for the solid electrolytes of lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaoning Ma,Youlong Xu
ABSTRACT Cubic garnet Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes have a strong potential to allow solid-state lithium-ion to become the next-generation energy storage systems and for addressing the safety issues. However, the applications of LLZO solid electrolytes are seriously limited by the relatively low critical current density of LLZO. In this study, we introduce lithium bromide (LiBr) with a low melting point as the sintering aid to prepare a high-performance garnet with high ionic conductivity , high relative density, and excellent critical current density. The prepared LLZO solid electrolyte with a LiBr concentration of 0.15 ( x LiBr–LLZO with x = 0.15 mol) exhibited a high ionic conductivity of 7.62 × 10 −4 S cm −1 at 25 ℃ with an excellent relative density of 96.27%. The critical current density (CCD) of the symmetric Li | 0.15LiBr–LLZO | Li cell was 1.0 mA cm −2 at 25 ℃. Furthermore, this cell can stably operate for 1000 h under a current density of 0.3 mA cm −2 . In addition, quasi-solid-state batteries of Li | LiFePO 4 with 0.15LiBr–LLZO electrolyte delivered excellent capacity retention (141.1 mAh g − 1 ; ∼89.7%) after 300 cycles, excellent rate performance, high coulombic efficiency and cycling stability. Furthermore, Li | LiNi 0.8 Co 0.1 Mn 0.1 O 2 with 0.15LiBr–LLZO electrolyte could run normally with high coulombic efficiency (>99%). These research results show that the solid-state batteries developed using 0.15LiBr–LLZO electrolyte are highly promising for the practical applications.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.8
Zilin Pan,Feng Ye,Shuanshi Fan,Yanhong Wang,Xuemei Lang,Lisha Lu,Gang Li
LiBr-H₂O absorption chillers offer significant advantages in cooling applications; however, their widespread implementation has been severely limited by their large weight and size. The miniaturization of their key components is therefore critical to expanding their practical applications. This study presents a novel desorber design that employs a pervaporation process to concentrate LiBr solutions using DDR zeolite membranes. High-quality DDR zeolite membranes were fabricated via a heteroepitaxial growth process, utilizing CHA rather than DDR zeolite seeds, owing to the successful suppression of the SGT competitive phase during membrane synthesis. The resulting DDR zeolite membrane exhibited a water flux ranging from 0.16 to 1.56 kg·m −2 ·h −1 and a LiBr rejection exceeding 99.9 % for 20–60 wt% LiBr solutions at temperatures of 20–80 °C. The activation energy for water permeation decreased from 20.64 to 9.69 kJ·mol −1 as the LiBr concentration increased from 20 to 60 wt%, which stemmed primarily from the combined effect of the thermodynamic properties of LiBr solutions and the adsorption behaviors of the membrane. Moreover, the DDR zeolite membrane demonstrated excellent stability in the pervaporation dehydration of LiBr solutions, even at 80 °C, highlighting its potential for use in desorbers for LiBr-H₂O absorption chillers.
✓ 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）