CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ningbo Yu,Qiang Sun,Minghao Wang,Huiying Liao,Zhiwu Liang,Hongxia Gao
Water-lean absorbents have garnered significant attention for CO 2 capture due to their advantages of low corrosivity and reduced regeneration energy consumption. However, current research indicates that alcohol-based solvents generally exhibit inhibiting effects on CO 2 absorption kinetics, and the underlying suppression mechanisms remain unclear. This study employs molecular dynamics simulations to confirm that the kinetic inhibition mechanism induced by alcohols stems from dual regulatory effects where alcohol molecules form a tighter solvation shell around amines to impede zwitterion formation, while their hydrophobic alkyl groups disrupt hydrogen-bond networks to hinder zwitterion deprotonation. Further research reveals a significant structure-kinetic relationship in 3AP-alcohol solutions, where increased chain length and branching degree of alcohols correlate with slower reaction kinetics. Through integrated analysis of electrostatic potential, non-covalent interactions (NCI), and charge density, we elucidate how solvent effects inhibit the 3AP-CO 2 reaction by three mechanisms: reducing the negative electrostatic potential contribution at the amino nitrogen site, increasing transition-state bonding resistance, and decreasing charge transfer efficiency. The validity of this structure-kinetic mechanism was confirmed by our established kinetic model (AARD <4 %). This study provides a theoretical basis for the solvent screening of CO 2 poor water absorbents, which is helpful for the development process of absorbents.
研究领域:
化学工程
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环境科学
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物理化学
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分离科学
·
绿色化工
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Ye Yuan,Jia Hu,Yu Wang,Leilei Huang,Jiayun Zheng,Yufeng Zhao,Yiyun Chen,Cheng Chen,Francis Verpoort
α-Hydroxy ketones are important building blocks in biological, pharmaceutical and synthetic chemistry. In this work, diverse α-hydroxy ketones were efficiently constructed through the CO 2 -promoted hydration process of propargyl alcohols, which was catalyzed by a system consisted of economical CuSO 4 ·5H 2 O and a green 1-butyl-3-methylimidazolium acetate ionic liquid. Particularly, this catalytic system exhibited excellent activity under atmospheric CO 2 or even mimetic flue gas (20 vol% of CO 2 ). Moreover, this system employed the lowest metal loading ever reported (0.004–0.25 mol%) meanwhile reached the highest turnover number (11700) for the target hydration reaction. Additionally, this is the first reported Cu catalytic system with reliable recyclability, which could be easily reused at least 6 times with yields higher than 85%.
研究领域:
催化
·
绿色化学
·
有机合成
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DOI
高影响因子
POLYMER
·
2015
·
IF 3.562
Xue Jiang,Chun Feng,Guolin Lu,Xiaoyu Huang
A homopolymer strategy was developed to synthesize temperature and pH/CO 2 stimulus-responsive homopolymers. A new class of acrylamide monomers bearing oligo(ethylene glycol) unit and N,N -diethylaminoethyl group were designed and prepared through Aza-Michael addition reaction followed by amidation with acryloyl chloride using amino group as a linkage to connect oligo(ethylene glycol), N,N -diethylaminoethyl, and polymerizable double bond groups together. Subsequently, the corresponding homopolymers containing oligo(ethylene glycol) unit and N,N -diethylaminoethyl group in each repeated unit were prepared via RAFT polymerization with controlled molecular weights and relatively narrow molecular weight distributions . The lower critical solution temperature (LCST) of homopolymer was examined to be influenced by molecular weight, salt concentration, and pH value of aqueous solution. The LCSTs of homopolymers could be tuned in a wide temperature window by changing pH value of aqueous solution and it increased with the decrease of pH value. Particularly, CO 2 gas as a unique pH stimulus can also reversibly adjust the solubility of homopolymer without the addition of acids or bases.
研究领域:
高分子化学
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智能材料
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药物递送
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生物医用材料
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刺激响应材料
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DOI
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Hongxia Gao,Zeyang Wu,Helei Liu,Xiao Luo,Zhiwu Liang
The absorption/desorption performance of carbon dioxide (CO2) in aqueous 5 M monoethanolamine (MEA) solutions in the presence of various solution regeneration promoters was comprehensively investigated using a multiple rapid screening method. The promoters considered were N-methyldiethanolamine (MDEA), N,N-dimethylethanolamine (DMEA), N,N-diethylethanolamine (DEEA), 1-dimethylamino-2-propanol (1DMA2P), 1-diethylamino-2-propanol (1DEA2P), 3-dimethylamino-1-propanol (3DMA1P), 2-(dimethylamino)-2-methyl-1-propanol (2DMA2M1P), triethanolamine (TEA), 3-(dimethylamino)-1,2-propanediol (3DMA-1,2-PD), and 3-(diethylamino)-1,2-propanediol (3DEA-1,2-PD). The molar concentration of these promoters added into 5 M MEA was set to 1 mol/L. At the atmospheric pressure, the absorption and stripping experiments were carried out at 313.15 and 353.15 K, respectively. Especially, the CO2 partial pressure was controlled at constant 15 kPa for absorption experiments. In addition, the equilibrium solubility of CO2 was also determined in order to evaluate the driving force of each amine system. The results showed that the highest CO2 equilibrium solubility of 0.5548 mol CO2/mol amine was obtained by MEA/1DEA2P, whereas both the fastest absorption and regeneration rates were achieved for aqueous blended MEA/1DMA2P solution which made MEA/1DMA2P to exhibit the highest CO2 cyclic capacity of 1.6710 mol CO2/L.
研究领域:
化学工程
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环境科学
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能源技术
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物理化学
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 56
·32358-32367
·
IF 2.936
Yong Dong,Liqin Cao,Jing Li,Yongxia Yang,Jide Wang
A novel clean method to synthesis a composite monolith was developed. Given its amphiphilic property, UiO-66 can emulsify water and CO2 to format a high internal phase emulsion (HIPE) under certain conditions. These UiO-66-emulsified Pickering HIPEs can be used as templates to prepare interconnected macroporous MOF/polymer composite monoliths. The effects of UiO-66 amount, cross-linking agent concentration, and CO2–water ratio on UiO-66/PAM structures were investigated. Then, the as-synthesized MOF/PAM composites were characterized by TGA, XRD, SEM, and FT-IR analyses, as well as rheological and DMA measurements. The results indicated that the composites are interconnected with hierarchical pores, and the diameter of the voids is 10–50 μm. The directly prepared monoliths exhibited relatively high stresses at 82% strain and recovered their shape quickly. The adsorption capacity of the composites for methylene blue (MB) is 50 mg g−1 at a faster adsorption rate. The monoliths also exhibit underlying applications in edible oil–water separation.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yuchen Li,Zhen Chen,Guoxiong Zhan,Bingling Yuan,Lidong Wang,Junhua Li
Catalytic amine-based solvent regeneration with solid acid is a feasible option for reducing energy consumption of CO 2 capture, but facing crucial challenges on designing material structures and understanding reaction mechanisms. Herein, we cover the nanoscale NiFe 2 O 4 cluster with covalent organic frameworks (COFs), to prepare solid acid catalysts. The pristine chemical bonds of Ni(Fe)-O and Ni(Fe)-Ni(Fe) are substituted by Ni(Fe)-N and Ni(Fe)-N-Ni(Fe) by targeting the anchoring of NiFe 2 O 4 cluster over COFs. The created coordination state stimulates the production of Brønsted acid sites. The obtained nanomaterials achieve a considerable improvement in CO 2 desorption of up to 290.1 mmol/(min·g) at 88 °C for spent monoethanolamine (MEA) solvent, representing a substantial increase of 540% relative to traditional thermal desorption. Consequently, the energy consumption of MEA generation is reduced by approximately 58%. Intermediate species (HCO 3− , CO 3 2− , and RNHCOO − ) and reaction pathways are established by combining operando Raman spectroscopy and ex situ 13 C NMR spectrum measurements. Theoretical calculations are performed to clarify the transformation mechanism of the acid sites around Ni/Fe atoms and its intrinsic role in the adsorption equilibrium of solvent regeneration.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhang Nian,Ren Guoxi,Li Lili,Wang Zhi,Yu Pengfei,Li Xiaobao,Zhou Jing,Zhang Hui,Zhang Linjuan,Liu Zhi,Liu Xiaosong
Garnet-type Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZO) is considered a promising solid electrolyte, but the surface degradation in air hinders its application for all-solid-state battery. Recent studies have mainly focused on the final products of the LLZO surface reactions due to lacking of powerful in situ characterization methods. Here, we use ambient pressure X-ray spectroscopies to in situ investigate the dynamical evolution of LLZO surface in different gas environments. The newly developed ambient pressure mapping of resonant Auger spectroscopy clearly distinguishes the lithium containing species, including LiOH, Li 2 O, Li 2 CO 3 and lattice oxygen. The reaction of CO 2 with LLZO to form Li 2 CO 3 is found to be a thermodynamically favored self-limiting reaction. On the contrary, the reaction of H 2 O with LLZO lags behind that of CO 2 , but intensifies at high pressure. More interestingly, the results provide direct spectroscopic evidence for the existence of Li + /H + exchange and reveal the importance of the initial layer formed on clean electrolyte surface in determining their air stability. This work demonstrates that the newly developed in situ technologies pave a new way to investigate the oxygen evolution and surface degradation mechanism in energy materials.
研究领域:
材料科学
·
电化学
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固态电池
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表面化学
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光谱学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Yun Deng,Shukui Shi,Di Zhao,Mohan Zu,Lu Pang,Xin Li,Zhihao Du,Xiaoli Jin,Zhengdao Li,Fengyun Su,Haiquan Xie
Photocatalytic H 2 O 2 production suffers from severe charge recombination and sacrificial agent dependency. Hydrangea-like Co-doped CdIn 2 S 4 superstructures (Co/CIS (HD)) synthesized via hydrothermal method exhibit hierarchical porous architecture that enhances light harvesting and reactant diffusion. Atomic Co doping introduces mixed-valence Co 2+ /Co 3+ species, reducing the work function from 6.287 to 5.896 eV and extending carrier lifetime. The dual-valent system establishes a self-regenerative redox cycle where Co 3+ mediates photogenerated electron transfer for O 2 activation while Co 2+ scavenges holes to suppress recombination and photocorrosion. Without sacrificial agents, the optimized 6.5-Co/CIS (HD) achieves an exceptional H 2 O 2 production rate of 1952 μmol g −1 h −1 under visible light, 6.33 times higher than pristine CdIn 2 S 4 . The catalyst maintains structural stability over five cycles due to dynamic Co 2+ /Co 3+ regeneration. This work provides a strategic design for efficient photocatalytic H 2 O 2 synthesis via synergistic morphological and electronic engineering.
研究领域:
材料科学
·
光催化
·
环境化学
·
能量转换
·
纳米材料
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Ruixue Ma,Jun Cheng,Ying Liu,Dongwei Jia,Jiahao Wang
Given that excessive CO 2 induces reactive oxygen species (ROS) which inhibit photosynthesis and microalgal survival, this study explores how exogenous arginine enhances stress resilience and biomass yield of Nannochloropsis oceanica under high CO 2 stress. Arginine promoted NO synthesis, enhancing antioxidant enzyme activities to combat ROS damage. Transcriptomic analysis revealed that key enzymes in the Calvin cycle (PRK, GAPDH, FBPase and SBPase) and TCA cycle (CS, IDH, SCS and MDH) were significantly up-regulated, supporting carbon fixation and energy metabolism. Arginine also alleviated cell necrosis by extending the G1 phase, promoting DNA replication and protein synthesis, which increased the proportion of viable cells from 47 % to 84 %. Furthermore, the synthesis of chlorophyll a and carotenoid were enhanced, leading to 46 % increase in biomass yield. The results highlighted arginine as a promising metabolic regulator for enhancing stress tolerance and carbon fixation efficiency of N. oceanica under high CO 2 conditions.
研究领域:
藻类学
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植物生理学
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分子生物学
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代谢工程
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环境胁迫生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Jia-nan Zheng,Mingjun Yang
Carbon dioxide (CO2) emission and fresh water scarcity have become two huge global issues over the last decades, and CO2 hydrate-based technology was promoted and developed to address them. This study investigated the effects of methylcyclopentane (MCP) on the hydrate formation condition and CO2 capture efficiency. Five cases and 31 cycles experiments of different MCP/water molar ratios (ranging from 0 to 0.03) in salt solution and porous media were conducted using the isochoric method. The hydrate phase equilibrium data of CO2–MCP hydrates were measured, and meanwhile the CO2 capture efficiencies were calculated. The results indicated that the rising MCP concentrations increase both the hydrate equilibrium temperature and the gas uptake. After the comparisons of the interpolated hydrate gas uptakes at uniform hydrate phase equilibrium pressure of 3 MPa among CO2–MCP, CO2–CP (cyclopentane), and CO2–C3H8 (propane) hydrates, CO2-MCP hydrates are especially suitable for CO2 capture. It should be noted that MCP is likely to form s-H hydrate with CO2 gas, but further confirmation is needed. Anyway, MCP can be thought as a potential coguest for integrated hydrate-based CO2 capture and desalination process.
✓ 已验证
DOI
高影响因子
Marine Drugs
·
2012
·Vol. 10
·期 12
·2634-2647
·
IF 3.854
Jiaojiao Zheng,Yicun Chen,Fen Yao,Weizhou Chen,Ganggang Shi
Gloiopeltis tenax(G. tenax) is widely distributed along the Chinese coastal areas and is commonly used in the treatment of diarrhea and colitis. This study aimed at investigating the bioactivities of the volatile constituents inG. tenax. We extracted the essential constituents ofG. tenaxby supercritical carbon dioxide extraction (CO2-SFE), then identified and analyzed the constituents by gas chromatography-mass spectrometry (GC-MS). In total, 30 components were identified in theG. tenaxextract. The components showed remarkable antioxidant activity (radical scavenging activity of 2,2-diphenyl-1-picrylhydrazyl (DPPH)), lipid peroxidation inhibition capacity (in a β-carotene/linoleic acid-coupled oxidation reaction), and hydroxyl radical-scavenging activity (by deoxyribose degradation by iron-dependent hydroxyl radical), compared to butylated hydroxytoluene. In microdilution assays,G. tenaxextracts showed a moderate inhibitory effects onStaphyloccocus aureus(minimum inhibitory concentration (MIC) = 3.9 mg/mL),Enterococcus faecalis(7.8 mg/mL),Pseudomonas aeruginosa(15.6 mg/mL), andEscherichia coli(3.9 mg/mL). Antioxidant and antimicrobial activities ofG. tenaxwere related to the active chemical composition. These results suggest that the CO2-SFE extract fromG. tenaxhas potential to be used as a natural antioxidant and antimicrobial agent in food processing.Keywords:Gloiopeltis tenax;GC-MS;CO2-SFE;antioxidant activity;antimicrobial activity
研究领域:
海洋生物学
·
食品科学
·
药用植物学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Jun Cheng,Leiqing Hu,Yannan Li,Jianzhong Liu,Junhu Zhou,Kefa Cen
To research effects of CO 2 absorption capacity and type of CO 2 absorbent on the CO 2 separation and free-volume properties of facilitated transport membranes, two types of CO 2 absorbents, namely monoethanolamine (MEA) and ionic liquids (ILs:[P 66614 ][Triz] and [P 66614 ][2-Op]), were adopted. The CO 2 absorption capacities of MEA, [P 66614 ][Triz] and [P 66614 ][2-Op] were about 0.561 mol CO 2 per mol, 0.95 mol CO 2 per mol and 1.60 mol CO 2 per mol, respectively. All mean free-volume hole radiuses of membranes decreased after blending CO 2 absorbents. After polymer membrane blended with two ILs, number of free-volume hole increased, resulting in modest increase of the fractional free volume. Both CO 2 permeability and selectivity increased after blending MEA and ILs. The increasing range of CO 2 permeability corresponded with CO 2 absorption capacity of CO 2 absorbents, and membrane blending with [P 66614 ][2-Op] showed the highest CO 2 permeability of 672.1 Barrers at 25 °C. Pebax/PEGDME membrane blending with MEA obtained the highest CO 2 /H 2 and CO 2 /CH 4 selectivity at 17.8 and 20.5, respectively.
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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）