CATALYSIS LETTERS
·
2025
·Vol. 155
·期 5
·1-7
·
IF 2.4
Zhou Lan,Bao Zhuxin,Pi Yanli,Shi Qiuling,Nan Shihao,Xiang Zhiling,Shi Tao,Jin Saimeng,Shen Weifeng
The environmental challenges associated with the dehydration of sorbitol to isosorbide using strong acid catalysts have prompted the development of cleaner and milder reaction pathway. The dehydration of sorbitol via dimethyl carbonate (DMC) in the presence of a catalytic amount of base is a reliable and environmentally friendly process for the industrial production of isosorbide. Herein, isosorbide is cleanly synthesized from sorbitol with DMC catalyzed by green catalyst sodium acetate under moderate condition. The optimal transformation conditions of sorbitol to isosorbide through DMC are determined to be a molar ratio of sorbitol to DMC = 1:16 and sodium acetate/sorbitol mass ratio = 3:20 reacting at 90 °C for 24 h with approximately 60% yield of isosorbide attained. The proposed synthesis process of isosorbide in this research is less hazardous and more environmental-friendly in compared to traditional synthesis processes, and broadens the range of catalysts used in the DMC based isosorbide production. Graphical
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yujia liu,Lina Zhang,Qurat ul ain,Zhangfa Tong
Cellulose acetate (CA) has traditionally been synthesized through processes that require the activation of cellulose, the use of corrosive acid catalysts, and subsequent hydrolysis. These factors make the process complex, costly, and environmentally harmful. This study proposed a method for preparing cellulose acetate by coupling sodium acetate (a non-toxic metal salt) with 1-butyl-3-methylimidazole chloride (BmimCl) ionic liquid. Single-step synthesis of cellulose acetate with a degree of substitution (DS) ranging from 0.71 to 3.0 was achieved under varying reaction conditions. The experimental results demonstrated that adding sodium acetate significantly enhanced the acetylation efficiency of cellulose in an ionic liquid across a broad temperature range. In addition, the cellulose acetate film prepared by this method has 95 % transparency, a tensile strength of 64.5 ± 1.9 MPa, and a water vapor permeability of 34.48 ± 1.47 g/m 2 h −1 . These remarkable properties give the film significant potential to serve as a replacement for petroleum-based plastics. Overall, this study presents a novel and efficient strategy to boost cellulose acetylation in an ionic liquid, delivering a sustainable, cost-effective, and scalable solution for producing cellulose acetate with precise DS control in just one step.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2016
·
IF 3.404
Wenlong Cui,Yanping Yuan,Liangliang Sun,Xiaoling Cao,Xiaojiao Yang
This paper reports that Nano-copper (Nano-Cu), which possesses high thermal and electrical conductivity, as an additive, can improve the supercooling properties of sodium acetate trihydrate (CH 3 COONa·3H 2 O, SAT) and enhance its thermal conductivity . To investigate the effect of Nano-Cu content on the degree of supercooling of SAT, composite phase change materials containing SAT, Nano-Cu (0.4%, 0.5%, 0.6%, 0.7% and 0.8%), CMC (thickening agent) and sodium dodecyl sulfonate (C 12 H 25 NaO 3 S, dispersant) were prepared. Melting-freezing experiments involving the composite materials indicated that the rate of heat transfer increased by nearly 20%. When an optimal amount of Nano-Cu (i.e., 0.5%) was added to SAT, the degree of supercooling was reduced to approximately 0.5 °C. Compared to the use of inorganic salt hydrates as nucleating agents , Nano-Cu is significantly advantageous in reducing the degree of supercooling of SAT. The maximum improvement in supercooling was observed when the melting-freezing experiment was conducted at an initial temperature of 70 °C. The thermal conductivity of the reported composite phasechange materialsis approximately 20% higher than that of pure SAT.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 5
·1079-1090
·
IF 7.2
Li Xiang,Zhu Nengwu,Xi Yunhao,Li Fei,Zhang Pengfei
Secondary aluminum dross (SAD) is a rich source of recyclable aluminum but poses considerable risk due to its high AlN content. Therefore, thoroughly removing AlN is essential, but intricate aluminum components and expensive additives pose challenges to the process. In this study, waste sodium acetate is proposed as an environmentally friendly additive for completely removing AlN and enhancing the extraction of aluminum from SAD. Through the exothermic decomposition of NaAc, reactions can occur at 850°C. AlN removal efficiency reached 93.19% after sintering, whereas Al leaching efficiency in the subsequent leaching process reached 90.49%, which were 37.86% and 375.26% higher than the removal efficiency of the control, respectively. These favorable results were attributed to the comprehensive transformation of aluminum species. The formation of soluble phase Na 1.95 Al 1.95 Si 0.05 O 4 occurred during the destruction of the Al 2 O 3 layer surrounding AlN and the transformation of other aluminum components. AlN decomposed upon contact with NaAc. Therefore, this study utilizes the decomposition properties of NaAc to provide an efficient and environmentally friendly route for removing AlN and extracting Al from SAD.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2020
·
IF 4.006
Yongfu Li,Bin Shi,Yangbo He,Mingxiu Long,Yueliang Zhao
Gamma irradiation can be performed alone or in combination with other preservatives such as dehydroacetic acid (DHA) and sodium dehydroacetate (DHA-Na) to achieve an enhanced level of food safety. Here, we studied the effect of gamma irradiation on the stability and degradation of DHA and DHA-Na in aqueous solution and pear juice. The degradation rate of DHA and DHA-Na was found to increase with increasing irradiation time and decreasing initial solute concentration in aqueous solution. The degradation rate of DHA-Na was higher than that of DHA under the same irradiation conditions. The degradation process of DHA and DHA-Na followed first-order reaction kinetics. The main radiolytic product of DHA and DHA-Na was identified as heptane-2,4,6-trione by GC-MS/MS, and the possible degradation pathway was proposed. Quantum chemical calculation results further confirmed that DHA-Na was much easier to be degraded than DHA. In addition, radiolytic degradation of DHA-Na happened in pear juice, but with a much lower degradation rate than that in aqueous solution.
研究领域:
食品安全
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化学动力学
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辐射化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Yue Wang,Jinghua Li,Yao Lei,Rong Cui,Aiping Liang,Xiaoqiang Li,Yoong Kit Leong,Jo-Shu Chang
Both co-cultivation and co-substrate addition strategies have exhibited massive potential in microalgae-based antibiotic bioremediation. In this study, glucose and sodium acetate were employed as co-substrate in the cultivation of microalgae-bacteria consortium for enhanced sulfadiazine (SDZ) and sulfamethoxazole (SMX) removal. Glucose demonstrated a two-fold increase in biomass production with a maximum specific growth rate of 0.63 ± 0.01 d −1 compared with sodium acetate. The supplementation of co-substrate enhanced the degradation of SDZ significantly up to 703 ± 18% for sodium acetate and 290 ± 22% for glucose, but had almost no effect on SMX. The activities of antioxidant enzymes, including peroxidase, superoxide dismutase and catalase decreased with co-substrate supplementation. Chlorophyll a was associated with protection against sulfonamides and chlorophyll b might contribute to SDZ degradation. The addition of co-substrates influenced bacterial community structure greatly. Glucose enhanced the relative abundance of Proteobacteria , while sodium acetate improved the relative abundance of Bacteroidetes significantly.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Thermal Science
·
2024
·Vol. 33
·期 4
·1564-1576
·
IF 1.8
An Zhoujian,Hou Wenjie,Du Xiaoze,Huang Zhongzheng,Mombeki Pea Hamir Johan,Zhang Dong,Liu Xiaomin
Phase change materials (PCMs) are a kind of highly efficient thermal storage materials which have a bright application prospect in many fields such as energy conservation in buildings, waste heat recovery, battery thermal management and so on. Especially inorganic hydrated salt PCMs have received increasing attention from researchers due to their advantages of being inexpensive and non-flammable. However, inorganic hydrated salt PCMs are still limited by the aspects of inappropriate phase change temperature, liquid phase leakage, large supercooling and severe phase separation in the application process. In this work, sodium acetate trihydrate was selected as the basic inorganic PCM, and a novel shape-stabilized composite phase change material (CPCM) with good thermal properties was prepared by adding various functional additives. At first, the sodium acetate trihydrate-acetamide binary mixture was prepared and the melting point was adjusted using acetamide. Then the binary mixture was incorporated into expanded graphite to synthesize a novel shape-stabilized CPCM. The thermophysical properties of the resultant shape-stabilized CPCM were systematically investigated. The microscopic morphology and chemical structure of the obtained shape-stabilized CPCM were characterized and analyzed. The experiment results pointed out that acetamide could effectively lower the melting point of sodium acetate trihydrate. The obtained shape-stabilized CPCM modified with additional 18% (mass fraction) acetamide and 12% (mass fraction) expanded graphite exhibited good shape stability and thermophysical characteristics: a low supercooling degree of 1.75°C and an appropriate melting temperature of 40.77°C were obtained; the latent heat of 151.64 kJ/kg and thermal conductivity of 1.411 W/(m·K) were also satisfactory. Moreover, after 50 accelerated melting-freezing cycles, the obtained shape-stabilized CPCM represented good thermal reliability.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Journal of Thermal Science and Technology
·
2016
·
IF 0.611
Xu JI,Haili LI,Congbin LENG,Ming LI,Rongkang FAN,Jiaxing LIU
A stabilized composite phase change material for heat storage was synthesized by adding expanded graphite and disodium hydrogen phosphate to sodium acetate trihydrate with the method of vacuum adsorption. The effects of expanded graphite and disodium hydrogen phosphate were experimentally explored and the thermal properties of the composite material were characterized. The experimental results indicated that disodium hydrogen phosphate was an excellent nucleating agent for sodium acetate trihydrate. With addition of 1% disodium hydrogen phosphate, the supercooling degree of sodium acetate trihydrate decreased significantly from over 38°C to about 0.5°C. The addition of expanded graphite was also helpful to ameliorate supercooling of sodium acetate trihydrate. Furthermore, phase separation of sodium acetate trihydrate could be effectively eliminated by adding expanded graphite. Compared with the disodium hydrogen phosphate/sodium acetate trihydrate composite material (without addition of expanded graphite), the heat storage/release time of the expanded graphite/disodium hydrogen phosphate/sodium acetate trihydrate composite material was shorten by 75.3%. With the optimal ingredient proportion of 8% expanded graphite, 1% disodium hydrogen phosphate and 91% sodium acetate trihydrate, the composite material became a stabilized 'solid-solid' phase change energy storage material with excellent thermal performance. Its thermal conductivity was greatly improved, and the phase change latent heat reached 233.5kJ/kg. The supercooling and phase separation phenomenon were no longer observed.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Min-Hua Cui,Dan Cui,Lei Gao,Hao-Yi Cheng,Ai-Jie Wang
A continuous stirred tank reactor with built-in bioelectrochemical system (CSTR-BES) was developed for azo dye Alizarin Yellow R (AYR) containing wastewater treatment. The decolorization efficiency (DE) of the CSTR-BES was 97.04 ± 0.06% for 7 h with sludge concentration of 3000 mg/L and initial AYR concentration of 100 mg/L, which was superior to that of the sole CSTR mode (open circuit: 54.87 ± 4.34%) and the sole BES mode (without sludge addition: 91.37 ± 0.44%). The effects of sludge concentration and sodium acetate (NaAc) concentration on azo dye decolorization were investigated. The highest DE of CSTR-BES for 4 h was 87.66 ± 2.93% with sludge concentration of 12,000 mg/L, NaAc concentration of 2000 mg/L and initial AYR concentration of 100 mg/L. The results in this study indicated that CSTR-BES could be a practical strategy for upgrading conventional anaerobic facilities against refractory wastewater treatment.
研究领域:
环境工程
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生物技术
·
废水处理
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xiaohui Guo,Yingjuan Fu,Fawei Miao,Quanshui Yu,Na Liu,Fengshan Zhang
Thermal acetic acid/sodium acetate hydrolysis (ASH) on poplar wood chips were carried out to obtain functional xylooligosaccharide, then the hydrolyzed wood chips were subjected to kraft pulping (KP) to fractionate cellulose and lignin. The separated three fractions were extensively characterized for further utilization in view of the integral biorefinery concept. The extraction efficiency of hemicelluloses by ASH strongly depends on the buffer ratio of the acetic acid/sodium acetate buffer solution. The ASH facilitated producing a high ratio of xylooligosaccharides with high molecular weight, while prevented further degradation of the saccharides, and simultaneously inhibited the condensation of lignin facilitating the subsequent kraft delignification. The obtained cellulose pulps had higher intrinsic viscosities as compared with the traditional autohydrolysis-KP process. Moreover, the ASH-KP process delivered a high purity of lignin with relatively high molecular weight. Therefore, the proposed integrated fractionation strategy is conducive to convert the lignocellulosic components into bio-based functional materials.
研究领域:
林业工程
·
生物炼制
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2023
·
IF 7.8
X. Wu,S. Lv,Z. Lu,Q. Zhang,F. He,Y. Li,Y. Zhou,P. Lv,W. Yang
The need to heat buildings during peak periods increases energy consumption. Solar/electric-to-thermal energy conversion heat storage systems can effectively address the heating mismatch issue due to variable solar light intensity. Sodium acetate trihydrate (SAT), borax, and sodium carboxymethyl cellulose (CMC) were used as the solar/electric energy storage medium, nucleating agent , and thickening agent, respectively. A carbon material, expanded graphite (EG), was used as the thermal conductor and solar/electric energy conversion enhancer. EG also acts as a nucleating agent synergistically with borax. The results show that adding 4 wt% EG, 1 wt% borax, and 2 wt% CMC decreased the supercooling of SAT to 1 °C without phase separation, and the composite exhibited excellent thermal cycling stability and a high latent heat storage capacity of 261.5 J/g. The thermal conductivity of the composite increased by 287.7% compared to pure SAT, and its solar-to-thermal energy conversion and electric-to-thermal energy conversion efficiencies reached 90.3% and 87.1%, respectively. This study offers a method for developing thermal storage systems with multiple energy conversion capabilities for prospective applications in solar energy utilization, electrical energy recovery, and building heating.
研究领域:
能源材料
·
建筑节能
·
太阳能利用
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Xi Man,Hao Lu,Qing Xu,Changjun Wang,Ziye Ling
Phase change materials (PCMs) present promising solutions for enhancing energy efficiency in solar heat pump systems . In our study, we have innovatively developed a composite PCMs (CPCMs) by combining sodium acetate trihydrate (CH 3 COONa·3H 2 O, SAT), lithium chloride (LiCl), potassium chloride (KCl), and incorporating expanded graphite (EG). This addition of high thermal conductivity EG was aimed at bolstering the CPCM's thermal stability. Our findings reveal that SAT-LiCl-KCl/EG CPCMs, with 14 wt% EG, significantly enhances thermal energy storage performance while preserving the fundamental phase change characteristics. The resulting CPCMs demonstrates a phase transition temperature of 49.3 °C and a latent heat of 196.4 J/g, ideally suited to meet the demands of hot water heat pump systems operating in the 45–50 °C range. Notably, the thermal conductivity of this CPCMs, following the incorporation of 14 wt% EG, registers at 4.54 W/(m K), representing a remarkable 10.6-fold increase compared to the SAT-LiCl-KCl ternary eutectic salt. To ensure long-term stability, secondary encapsulation with a thermally conductive sealant was applied. Subsequent tests involved subjecting the CPCM to 3000 heating/cooling cycles, resulting in minimal deviations, with the phase transition temperature shifting by approximately 1 °C and a modest 6 % reduction in latent heat of phase transition. These outcomes underscore the robustness and reliability of our developed composite phase change materials.
研究领域:
能源材料科学
·
热能工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）