AICHE JOURNAL
·
2025
·
IF 4
Zhongxiao Sun,Zhiyong Xu,Jinyu Wang,Xiandong Hao,Wenbo Zhao,Jianming Pan
The traditional chemical absorption method using alkanolamine aqueous solution for carbon dioxide (CO 2 ) capture suffers from high volatility and high energy consumption for regeneration. In the present work, a mixed absorbent comprising diethanolamine (DEA) and polyethylene glycol 200 (PEG200) with high thermal stability and low specific heat capacity was designed for CO 2 absorption. Absorption capacity was measured at different temperatures and pressures; the first-order kinetic and bimolecular reaction thermodynamic models were also developed, and relative parameters were obtained. An optimal simulation of the absorption process was carried out. Based on the optimal control (OC) theory and kinetic parameters, the optimal absorption temperature of the absorption process at a certain fixed time was obtained, which decreases with the increase of time. Moreover, the optimal absorption temperature curve can further enhance the absorption capacity. Furthermore, an entropy–enthalpy compensation phenomenon was found for the capture of CO 2 with different absorbents.
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
Environmental Progress & Sustainable Energy
·
2026
·
IF 2.6
Meng Li,Xuejing Gu,Zhitao Han,Xiao Yang,Xi Wu,Mengjing Zhang
The previous work has demonstrated that tetrabutylammonium chloride (TBAC) has an obvious enhancement effect on electrochemically mediated regeneration of MEA monoamine solution. Building upon this finding, this study expands the TBAC-assisted strategy from a monoamine system to an MEA/DEA mixed-amine system, systematically investigating the influence of key parameters on the regeneration performance of electrochemically mediated MEA/DEA mixed amine solutions with TBAC additive. By optimizing the amine type, MEA/DEA ratio, and Cu 2+ concentration, an efficient TBAC/MEA/DEA ternary system is constructed. The results show that under optimal conditions with an MEA/DEA mass ratio of 1:2 and a Cu 2+ concentration of 0.10 mol·mol −1 amine, the system achieves a desorption energy consumption as low as 14.55 kJ·mol −1 CO 2 , which is 16.9% lower than that of the TBAC-free MEA/DEA system. Characterization analysis confirms that CO 2 is released through the decomposition of carbamate, and the introduction of DEA alters the electrode reaction behavior, thereby facilitating the redox process. The result is the formation of columnar crystals on the cathode and a flower-like structure on the anode. This study provides a practical pathway for low-carbon capture in industrial sectors.
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
P.Y. Guo,Q.H. Wu,X.J. Wang,M.X. Wei,Y. Shao,Z.G. Liu
Due to the combined effects of high-density electric fields, water vapor, and residues, adjacent solder joints are prone to electrochemical migration. This study investigates the electrochemical reaction processes and mechanisms of Sn and Sn-58Bi in methanesulfonic acid(MSA), sulfosalicylic acid(SSA), diethanolamine(DEA), triethanolamine(TEA), and triisopropanolamine (TIPA) flux solutions. The results show that under natural corrosion conditions Sn-58Bi exhibits better electrochemical corrosion resistance than Sn. Under dynamic potential conditions, reaction rates of Sn-58Bi exceed that of Sn due to the dissolution of Bi. The dissolution threshold for Bi occurs at approximately 0.15 V in the TEA solution, 0.37 V in the TIPA solution, and 1 V in the DEA solution. Sn-58Bi in the MSA and SSA solutions primarily undergoes Sn dissolution, whereas in the DEA, TEA, and TIPA solutions, Bi dissolution is the dominant process. Under a constant voltage of 1 V vs.SCE , the dissolution current of Sn is lower than that of Sn-58Bi. Sn-58Bi in the TIPA solution shows instability in the passivation film. Under a constant voltage of 5 V vs.SCE , the stable current values for both solders are similar.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Mengjie Chen,Qinlan Luo,Haizhou Lin,Qiang Sun,Hongxia Gao,Sen Liu,Yuanyuan Li,Zhiwu Liang
The kinetic behavior of the reaction of CO 2 with MEA-TREA in ethanol solution was studied using the stopped-flow technique. The results indicate that the zwitterion mechanism successfully correlates the experimentally measured pseudo first-order reaction constant ( k 0 ) and that the TREA participated in the deprotonation step of MEA-zwitterion as an alkaline substance after the formation of MEA-zwitterion. Then, the applicability of this proposed mechanism was investigated by using the reaction kinetics of CO 2 with MEA-DMEA, MEA-DEEA, MEA-MDEA, DEA-TREA, DEA-DMEA blended amines in non-aqueous ethanol solution, as well as MEA-TREA, MEA-DMEA, DEA-TREA, DEA-DMEA blended amines in water-lean solutions. It was found that the mechanism of the reaction of CO 2 with these mixed amines can be expressed by: k 0 = K A - A z [ A ] 2 + K A - B z [ A ] [ B ] + K 1 z [ A ] . The ethanol and water molecules which contribute to K 1 z can be used as proton transfer channels to accelerate proton transfer, but they do not directly participate in the reaction. In addition, the alkalinity and the steric hindrance effect controlled by the molecular structure of tertiary amines affected the reaction rate at the same time. The activation energies in MEA-EtOH and MEA-TREA-EtOH system were estimated by fitting the second-order rate constants to the Arrhenius expression, indicating that TREA can reduce the reaction activation energy and make the reaction more kinetically favorable.
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
Materials Advances
·
2022
·Vol. 3
·期 5
·2568-2582
·
IF 0
Qing Zhong,Gen Li,Hui Long,Jingxian Zhang,Suiping Deng,Langhuan Huang,Shaozao Tan
Temperature-sensitive hydrogels are always hotspot and have shown great potential in the field of biomedicine. Herein, we report N,N-diethylacrylamide (DEA) temperature-sensitive nanocomposite hydrogels with improved mechanical properties composed of carbon nanotubes (CNT) and glycidyl methacrylate functionalized quaternized chitosan (QCGM), followed by deciphering the synergy between CNT and QCGM for the influence on the properties of the hydrogels. The prepared hydrogels not only present a temperature-stimulus response but also feature in NIR-stimulus response performance due to the addition of CNT. In particular, the DQ0.5C1 hydrogel exhibits the optimal performance, including high mechanical strength and thermal behavior, and was subjected to examine the photothermal conversion ability, as well as loading the model drug ciprofloxacin hydrochloride (CIP) to investigate the drug release and antibacterial ability under different conditions. Moreover, the biocompatibility experiments and the in vivo full-thickness skin defect model results signify that the hydrogels have excellent biocompatibility and also can promote wound closure with accelerated wound contraction and improve the wound-healing process. All in all, the prepared temperature-sensitive nanocomposite hydrogels with improved mechanical properties, high biological safety, and accelerated wound healing have considerable practicability in the fields of drug delivery and wound dressing.
研究领域:
生物材料学
·
生物医药工程
✓ 已验证
DOI
FOOD CHEMISTRY
·
2018
·
IF 4.946
Huimin Wang,Haiyan Liu,Bin Guo,Dandan Lan,Xiaomin Pang,Hongyuan Yan,Dandan Han,Huaizhong Guo,Ligai Bai
A novel monolithic column was prepared by in-situ free radical polymerization using N -methylolacrylamide (NMA) and N , N -diethylacrylamide (DEA) as co-monomers. The monolith was characterized by scanning electron microscopy (SEM) and its nitrogen adsorption-desorption isotherm, and it was used as a solid phase extraction (SPE) absorbent for the online enrichment of β-sitosterol by high performance liquid chromatography. The optimized method had good linearity, and the linear regression coefficient was 0.998. The limit of detection (LOD) and the limit of quantification (LOQ) were 0.006 mg/mL and 0.02 mg/mL, respectively. The interday and intraday accuracies were less than 7.28%. The spiked recoveries of β-sitosterol in the six plant oil were 90.96–103.56%. The maximum amount of β-sitosterol adsorbed on the monolithic column was 12.69 mg/g, and the enrichment factor of β-sitosterol was 78. The results showed that the monolith could be used as an online SPE absorbent for the determination of β-sitosterol in plant oil samples.
研究领域:
分析化学
·
药学
·
食品科学
✓ 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）