INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Liuxing She,Lei Peng,Hang Yuan,Tianrong Zhu,Qiang Fu,Zaikun Wu
The absorption kinetics of CO2 into a novel nonaqueous mixture of 2-amino-2-methyl-1-propanol (AMP) and piperazine (PZ) was studied at atmospheric pressure. The effects of AMP/PZ molar ratio, total concentration, absorption temperature, and inlet flow rate were discussed. The results showed that the composite absorbent with an AMP/PZ ratio of 6:4 had a good effect on the CO2 absorption at 293 K. Unlike relevant reports at home and abroad, the solubility of CO2 in the 1-pentanol solution of AMP and PZ (AMP-PZ-Pentanol) was calculated based on a solution rule model and relevant data from Aspen Plus. The absorption kinetics of CO2 into nonaqueous composite absorbent was analyzed by a double stirred-cell absorber. It shows the enhancement factor increases with the increasing of total concentration but decreases with the increasing of absorption temperature. The absorption mechanism of CO2 in AMP-PZ-Pentanol was determined to be the formation of carbamate by FT-IR, 13C NMR, and XRD analysis. Based on the vapor–liquid equilibrium theory, the reaction heat of CO2 into the phase change absorbent was calculated to be 9.30 KJ mol–1. The results show that the composite absorbent has a lower reaction heat than any single component in it. The desorption experiment of saturated solution shows that the composite absorbent can be completely regenerated in a short period of time, which meets the industrial requirements for CO2 absorbents and will provide a theoretical basis for further industrial applications of this type of absorbent.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yi Yu,Xiaoqiang Gao,Zhouxuan Zang,Li Xu,Guoji Liu
In this work, the solubility of 2-methyl-1,4-naphthoquinone (2-MNQ, Vitamin K3) and its by-product 2-naphthaldehyde in binary and ternary systems was studied. Three phase diagrams were established based on the experimental solubility data. Each ternary phase diagram contains three crystallization regions (pure 2-MNQ, pure 2-naphthaldehyde and mixture of 2-MNQ and 2-naphthaldehyde), two co-saturated curves and one co-saturated point. The crystalline region of 2-MNQ is larger than that of 2-naphthaldehyde at three temperatures (283.15, 293.15 and 303.15) K. The solubility of the binary (2-MNQ + ethanol and 2-naphthaldehyde + ethanol) system was correlated by λh equation, modified Apelblat equation and NRTL model. The ternary (2-MNQ + 2-naphthaldehyde + ethanol) system was correlated by NRTL model. The calculated values agree well with the determined solubility data. Interaction energy between solute and solvent molecules were calculated to illustrate the solubility behavior of 2-MNQ and 2-naphthaldehyde in ethanol. RDF shows that when adding pure 2-naphthaldehyde in solution of 2-MNQ + ethanol, the interaction between 2-MNQ and ethanol molecules will become stronger, which leads to an increase in solubility of 2-methyl-1,4-naphthoquinone. This study can provide basic data and theoretical foundation for the separation process.
研究领域:
化学工程
·
分子生物学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 33
·23662-23671
·
IF 3.9
Wanjing Zhang,Liyan Wang,Hong Chen,Liying Guo,Yaoyao Bai,Xin Qian
A series of 2-methyl-1,3-propanediol (MPO) modified azelaic acid and hexylene glycol copolyester (PHMAZ) plasticizers with varying contents were synthesized using a direct esterification melt polycondensation method, and their structures were characterized systematically. Analysis using infrared spectroscopy and nuclear magnetic resonance spectroscopy confirmed the synthesis of the designed copolyester structure. Gel permeation chromatography (GPC) tests indicated that the number average molecular weight of each copolyester sample ranged between 2000 and 3000. These copolyesters were used to plasticize polyvinyl chloride (PVC) resin, and the glass transition temperature of the plasticized PVC samples was tested using a differential scanning calorimeter (DSC). Further characterization of the plasticizing effects was conducted using an electronic universal testing machine. The research results showed that as the content of MPO increased, the plasticizing effect of the copolyester initially increased and then decreased. Specifically, the copolyester containing 45% MPO, PHMAZ-45, demonstrated the best plasticizing effect on PVC, with the glass transition temperature of the plasticized PVC system around −35 °C, elongation at break at 908.4%, and a plasticizing efficiency of 254.5%. Additionally, this new type of copolyester plasticizer uses bio-based raw materials, exhibits excellent plasticizing effects, and the preparation process is stable and controllable. It holds promising potential to replace traditional volatile and toxic phthalate esters, presenting significant industrial application value.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Wanjing Zhang,Yuqi Shan,Liyan Wang,Yanming Chen,Liying Guo,Yunsheng Chong,Xin Qian
Currently, mainstream phthalate plasticizers pose serious threats to the environment and human health. As an eco-friendly and harmless alternative, polyester plasticizers have garnered widespread attention. However, their complex preparation process and low plasticizing efficiency have limited their practical application. In this study, a series of copolyester plasticizers (POMAZ), synthesized from azelaic acid, octanediol, and various contents of 2-methyl-1,3-propanediol (MPO), were prepared via direct esterification. The preparation process is controllable, and the number-average molecular weight of POMAZ ranges from 1000 to 4000, with a thermal degradation temperature above 270°C, demonstrating excellent thermal stability. PVC samples plasticized with POMAZ showed a decrease in glass transition temperature to −30°C and increased hydrophilicity with higher MPO content. Measurements of the tensile elongation at break of plasticized PVC verified the outstanding plasticizing performance of the POMAZ series. Specifically, POMAZ-45/PVC exhibited an elongation at break of up to 975.3%, with a plasticizing efficiency reaching 273.2%.
研究领域:
材料科学
·
环境科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 1
·297-305
·
IF 1.027
Yu Shuai,Hao Cui,Liu Yuzhi,Chen Hui,Cheng Yan,Xue Fumin
The solubility of 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) in seven pure solvents, methanol, ethanol, 2-propanol, 1-butanol, isopentanol, acetone, and ethyl acetate, in the temperature range between 283.15 and 328.15 K at atmospheric pressure (101.3 kPa) is reported in this paper. The solubility of 2-acrylamido-2-methyl-1-propane-sulfonic acid increases with temperature in all selected solvents. The van’t Hoff equation, modified Apelblat equation, Wilson model, and λh model were applied to correct the solubility data. The results show that the modified Apelblat equation fits the best, with an average relative deviation of less than 3.70%. The mixing properties, such as Gibbs free energy, enthalpy and entropy of AMPS, were calculated based on the van’t Hoff equation. The dissolution process of AMPS in all solvents selected is endothermic, non-spontaneous and enthalpy-driven.
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 CHEMICAL THERMODYNAMICS
·
2020
·
IF 2.888
Xingchuan Yang,Xiangmeng Chen,Chunmei Cao,Li Xu,Guoji Liu
Solubility and liquid–liquid equilibria data for ternary systems for (water + 1,6-hexanediol + 1-butanol/2-methyl-1-propanol) were obtained at (293.15–323.15) K under atmospheric pressure. The LLE data were determined using a double-jacketed glass vessel, and the solubility curves were acquired by the cloud-point method. The distribution coefficient and separation factors were calculated and the reliability of experimental data was assessed by the Othmer–Tobias equation and Hand equation. The measured LLE data were fitted by NRTL and UNIQUAC models and binary parameters were obtained by using of Aspen Plus software. The calculated root-mean-square deviation values show that the calculated results from models showed good agreement with experimental data.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Rui Zhang,Yufan Li,Xinwei He,Yingjie Niu,Chao'en Li,Mohammad Waleed Amer,Francesco Barzagli
Mixing amines with different properties is considered a smart strategy for developing efficient aqueous solutions for reversible CO 2 capture. Specifically, dual-amine blends containing the tertiary amine 2-dimethylamino-2-methyl-1-propanol (2DMA2M1P) have proven to be particularly advantageous due to significantly lower regeneration costs compared to conventional sorbents. With the aim of formulating high-efficiency sorbents, in this work we evaluated the improvement in the CO 2 capture performance of such dual-amine blends by adding a further amine to form trio-amine systems: the use of three amines with different characteristics could further emphasize the advantages obtainable during both absorption and desorption. We formulated three new different aqueous solutions prepared by mixing 2DMA2M1P with the reaction rate promoter ethanolamine (MEA) and the absorption capacity promoter 2-amino-2-methyl-1-propanol (AMP) in different molar ratios. For each blend, the CO 2 solubility at equilibrium, the CO 2 absorption rate from a gaseous mixture, the regeneration rate at T = 373 K and the energy requirement for desorption were determined experimentally. In addition, to better understand the capture mechanism, 13 C NMR spectroscopy was employed to evaluate the speciation of each blend during the CO 2 absorption. Their CO 2 capture performance was compared with that of the benchmark aqueous MEA and two 2DMA2M1P-based dual-amine mixtures, obtained with the same procedure. As a finding, all formulated trio-amine blends have superior CO 2 equilibrium solubility and desorption performance compared with MEA 5 M. Noteworthy, the comparison with similar dual-amine systems highlighted the role of a suitable third amine in order to obtain enhance both absorption and desorption efficiencies. Among the formulated systems, MEA-2DMA2M1P-AMP (1:2:2) is potentially the most suitable to replace MEA in CO 2 capture processes after a careful cost-benefit analysis on larger scale systems.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Tongtong Ren,Suli Liu,Hong Li,Angui Zhang,Xingang Li,Wei Yuan,Xin Gao
Utilization of F-T synthetic to produce value-added C 8 linear α-olefin is a promising alternative approach, however, the purification of α-olefin from F-T synthetic products is a great challenge, especially for removing 2-methyl-1-heptene (MH). This article addresses the novel method of etherification reaction to remove MH from F-T synthetic products, and develop by far the most efficiency reactive distillation (RD) method to intensified the etherification process. The scarcity of thermodynamic data was measured and regressed by the activity coefficient models, furthermore, kinetics of the etherification reaction of MH with methanol was explored using an ion exchange resin as catalyst, and then fitted by a pseudo-homogeneous model. The pilot-scale RD experimental results show that the conversion of MH reaches 91.83 % and the purity of α-olefin increases by 14.9 wt% (percentage points). Process analysis method was used to realize the optimization of design and operating parameters of etherification RD column based on the developed rigorous model. The optimization results show that the conversion of MH achieves 99.74 % and the purity of α-olefin achieves 96.87 wt%, which is also illustrated that the novel method for removing MH is proposed paving the way for purification of α-olefin from F-T synthetic products.
研究领域:
化学工程
·
石油化学
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2022
·
IF 8.321
Mengmeng Ma,Yuchen Liu,Yuli Chen,Guohua Jing,Bihong Lv,Zuoming Zhou,Shihan Zhang
The large-scale deployment of non-aqueous amine solution for carbon dioxide (CO 2 ) capture is mainly limited by its high viscosity, even insoluble substances in saturated solution, which may result in equipment fouling and pipeline blockage. To avoid this problem, the polyamine 1,5-diamino-2-methyl-pentane (DA2MP) was screened as the main absorbent to ensure the high absorption load. While 2-amino-2-methyl-1-propanol (AMP) was used as the regulator to reduce the viscosity and eliminate insoluble substances, which dissolved in n-propanol (PrOH) to from the novel non-aqueous absorbent for CO 2 capture. The CO 2 absorption load of the novel absorbent was 0.95 mol·mol −1 , and the viscosity of saturated solution was only 15.00 mPa·s, remarkably lower than that of the solution without AMP regulation. The solution maintained 97% of its initial CO 2 absorption capacity after fourth regeneration cycle. The regulation mechanism was investigated using 13 C nuclear magnetic resonance (NMR) and quantum chemical calculations. It was proved that a strong and dense hydrogen bond network between DA2MP-carbamates was formed due to the self-deprotonation process, leading to insoluble products in the saturated DA2MP/PrOH solution. Through AMP regulation, there was another type of DA2MP-carbamates deprotonated by AMP formed in the solution with less hydrogen bond network, which could further react with PrOH to produce alkyl carbonates, achieving the elimination of insoluble products and reducing viscosity. Overall, the total regeneration energy consumption was 1.86 GJ·ton −1 CO 2 , only 50.27% of that of the benchmark monoethanolamine (MEA)-based solution, which would be a promising candidate for CO 2 capture.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2015
·
IF 2.2
Fang Zhang,Long Wang,Yaocun Tang,Xiaoqiang Gao,Li Xu,Guoji Liu
The solid–liquid equilibrium or the ternary system of 2-methyl-1,4-naphthoquinone + phthalic anhydride + acetone were determined at three temperatures of (283.15, 293.15 and 303.15) K, respectively. Three isothermal phase diagrams of the system were constructed on the basis of the measured solubility. Two pure solid phases were formed at (283.15, 293.15 and 303.15) K, including pure PA and pure 2-MNQ, which were confirmed and determined by the method of Schreine makers' wet residue. The densities of equilibrium liquid phase were determined experimentally at the corresponding temperatures versus mass fraction of component. The phase diagram at 283.15 K is similar to those at (293.15 and 303.15) K and the crystalline fields of 2-MNQ and PA decrease with an increase in temperature. The ternary diagram can provide the fundamental basis for separation of 2-MNQ and PA.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2024
·
IF 10.4
Xiaobin Zhou,Yunqiong Tang,Chao Liu,Shengpeng Mo,Yinming Fan,Dunqiu Wang,Bihong Lv,Yanan Zhang,Yinian Zhu,Zongqiang Zhu,Guohua Jing
To tackle the prevalent challenges encountered with polyamine-based non-aqueous absorbents (NAAs), particularly the formation of viscous products and inferior regeneration performance, this study proposed an innovative synergistic regulation strategy that integrated 2-amino-2-methyl-1-propanol (AMP) and n-propanol (NPA). Accordingly, a novel tertiary tetraethylenepentamine (TEPA)-AMP-NPA (T-A-N) NAA was devised. The optimized T-A-N maintained complete homogeneity throughout the entire CO 2 absorption process and achieved an impressive CO 2 loading of 1.15 mol·mol −1 while maintaining a low viscosity of merely 22.47 mPa·s. Remarkably, its absorption capacity showed little decrement after four consecutive absorption-desorption cycles, underscoring its exceptional recyclability. Within the T-A-N system, AMP underwent a reaction with CO 2 , yielding AMP-carbamate and protonated AMP, while TEPA engaged in CO 2 absorption to form zwitterionic carbamates. During the desorption process, NPA served as a regeneration activator, facilitating the conversion of stable TEPA-carbamates into less stable alkyl carbonate intermediates, thereby enhancing the T-A-N's regeneration performance. Moreover, the T-A-N system addressed the issue of TEPA-carbamate self-aggregation into insoluble gelatinous substances by leveraging the synergistic enhancement effects between AMP derivatives and NPA. Specifically, these components effectively bound TEPA-carbamate species via robust electrostatic affinity and intermolecular hydrogen-bond interactions, inhibiting their self-aggregation and preventing the formation of insoluble products. Furthermore, T-A-N exhibited a significant reduction in both sensible and latent heat requirements, by 67 % and 82 % respectively, compared to 30 wt% MEA, highlighting its advantageous energy-saving potential for CO 2 capture. Overall, harnessing the synergistic enhancement effects of AMP and NPA was conducive to the development of polyamine-based NAAs that offered superior CO 2 capture reversibility, low energy consumption, and resistance to insoluble product formation.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jijuan Zhou,Dianlong Ge,Yue Liu,Yajing Chu,Xiangxue Zheng,Yan Lu,Yannan Chu
Cellular volatile organic compound (VOC) detection is crucial for studying lung cancer biomarkers. However, the reported VOC biomarkers from the same cell line seem to be inconsistent across different research groups. It is possibly related to the variation in culture media, and the result obtained by a conventional single medium approach (SMA) depends on what medium is used in the cell experiment. This study proposes a multiple media approach (MMA) to investigate reproducible characteristic VOCs of lung cancer cells. Using solid-phase microextraction–gas chromatography–mass spectrometry (SPME-GC-MS) in combination with untargeted analysis, we conducted two independently repetitive experiments to compare lung cancer cells (A549) and normal lung cells (BEAS-2B) under three culture media conditions (RPMI 1640, DMEM, and Ham’s F12). Both experiments indicated that, compared with 62–96 VOCs obtained by the SMA, only two VOCs (3-methyl-1-butanol and 2-methyl-1-butanol) were reproducibly achieved by the MMA. Moreover, their concentrations were significantly lower in lung cancer cells than in normal cells. Further targeted analysis confirmed the downregulation trend of both VOCs in subcutaneous and primary tumor tissues from the lung cancer model mouse. The present work demonstrated that the MMA cell experiment, just like the multicenter trials for cell lines, can facilitate the discovery of reproducible characteristic VOCs. This provides a cellular experimental basis and scientific evidence for lung cancer biomarker investigation and even breath biopsy technique development.
研究领域:
医学
·
分析化学
·
肿瘤学
✓ 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）