Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·124054
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IF 7.5
Yuhan Guo,Zebiao Jiang,Yu Zheng,Bohan Xiao,Yunxia Zhao
This study evaluates the CO₂ capture performance and multiscale mechanisms of three tertiary amine–promoter blends: DEEA + PZ, DMEA + PZ, and DEEA + AMP. Spectroscopic characterization at 12 vol% CO₂ identified dominant reaction pathways, while cyclic performance was evaluated under simulated gas-fired power plant flue gas conditions (4 vol% CO₂, 95 °C regeneration). DMEA + PZ achieves a cyclic working capacity of 8.49 g CO₂/kg solvent—1.92 times that of the 30 wt% MEA benchmark—with a 48% reduction in relative regeneration energy consumption. In situ Raman and quantitative ¹H qNMR analyses show that all three systems operate predominantly via the bicarbonate pathway, with the PZ-carbamate decomposition rate considerably higher for DMEA + PZ (∼22%) than for DEEA + PZ (∼17%). AMP forms no detectable carbamate, relying exclusively on the bicarbonate pathway and exhibiting a discernible solvent volatilization trend. DFT calculations reveal that the stronger basicity of DEEA, arising from the inductive effect of its ethyl groups, yields higher absorption capacity but greater regeneration energy, whereas the narrower HOMO–LUMO gap of PZ enables rapid nucleophilic kinetics and the steric shielding of AMP precludes stable carbamate formation. Classical MD simulations show that compact PZ diffuses considerably faster than the sterically encumbered tertiary amines, while AMP-containing systems exhibit restricted diffusion; RDF analyses indicate steric shielding between the N centers of the main amine and promoter, with –OH-mediated hydrogen-bonding networks providing potential proton relay pathways. These insights offer a theoretical foundation for designing blended amine solvents for low-partial-pressure, waste-heat-driven CCUS applications.
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CERAMICS INTERNATIONAL
·
2026
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IF 6
Kui Ding,Anqi Sheng,Jing Song,Shuyan Song,Hongjie Zhang,Lang Zhao
To address the low removal rate, severe surface damage, and unclear mechanism of A-plane sapphire during chemical mechanical polishing, a novel Al 2 O 3 -CeO 2 mixed-abrasive slurry was developed by integrating the mechanical abrasion of Al 2 O 3 with the chemical reactivity of CeO 2 . The optimal formulation, containing 2 wt% Al 2 O 3 , 0.2 wt% CeO 2 , 0.15 wt% sodium hexametaphosphate, 0.7 wt% isooctanol polyoxyethylene ether, and 0.5 wt% sodium D-gluconate with aminomethyl propanol as pH regulator, yields an atomically smooth surface (Ra = 0.079 nm) and a high removal rate (MRR = 905 nm/h). XPS analysis reveals that a hydrated Al-OH layer and a CeAl x O y soft phase form on the sapphire via interfacial solid-state reaction, and are removed by mechanical shearing of the mixed abrasives.
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Zhengang Zhou,Kai Feng,Xiuqi Hu,Chengjin Pan,Junjie Zheng,Lingyu Shao,Funing Wang,Xiao Zhang,Yang Zhang,Xiaojiang Li,Shihan Zhang,Chenghang Zheng,Xiang Gao
Amine-solvent degradation stands as a key bottleneck hindering the large-scale application of post-combustion CO2 capture, motivating the development of more chemically stable solvent chemistries. High-resolution mass spectrometry and density functional theory were combined to identify degradation pathways and quantify hydrogen-abstraction barriers. Sterically hindered and cyclic amines suppress hydrogen abstraction and downstream oxidation. Solvent degradation was evaluated in high-pressure autoclave reactors under simulated industrial flue-gas conditions representative of coal-fired power plants, with CO2 concentrations of about 10−15 vol %, O2 at several volume percent, and temperatures relevant to absorber−stripper operation and solvent circulation. Compared with conventional monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP) reduced degradation rates by 25−60%, attributable to steric hindrance that suppresses carbon-chain hydrogen abstraction. Under all tested operating conditions, a mixed solvent system comprising N-aminoethylpiperazine (AEP) and AMP demonstrated markedly stronger antidegradation capability than MEA. Antioxidants mitigated oxidative degradation, whereas Fe2+ accelerated it; chelating agents suppressed Fe2+-catalyzed oxidation by limiting peroxyradical formation. Structure−stability relationships and targeted additive design guided multifactor optimization of the absorbent formulation, improving stability by 71.6% under accelerated degradation tests and supporting long-term, oxygen-tolerant operation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zheng Jian,Dehong Gong,Langbo Bai,Wei Zheng,Shihai Zhang,Yuzhong Chen,Xi Zeng,Qihui Song,Guo Yu
The integrated absorption-mineralization (IAM) technology enables mild regeneration of the absorbent and permanent CO 2 storage in CO 2 capture systems. However, developing green and efficient absorbents remains the core challenge for this technology. In this study, potassium lysinate (LysK) was used as the main amine, and systematic investigations were carried out, including optimal formulation screening, mineralization process optimization, reaction mechanism analysis, and cyclic stability evaluation. The results showed that 2-amino-2-methyl-1-propanol (AMP) was the optimal auxiliary amine. The blended amine composed of 1.6 mol/L LysK and 0.4 mol/L AMP achieved a mineralization rate 15.28 percentage points higher than that of pure LysK, while maintaining a high CO 2 absorption capacity of 1.17 mol CO 2 /mol absorbent. Under optimal mineralization conditions, the mineralization rate reached 99.56%, approaching the theoretical maximum. The Ca 2+ /CO 2 molar ratio and stirring speed only regulated the mineralization kinetics without altering the final thermodynamic equilibrium state. The mineralization priority of different CO 2 species in the system followed: free HCO 3 − /CO 3 2− > ε-carbamate > α-carbamate. The mineralization product was predominantly high-purity calcite calcium carbonate, which meets the requirements for permanent storage. After ten absorption-mineralization cycles, the mineralization capacity and pH of the system remained stable, with no obvious performance degradation. The physical entrainment loss of the absorbent was quantitatively determined to be approximately 0.155 mmol/g CaCO 3 per cycle. A preliminary economic assessment shows that after deducting the direct operating costs, the co-production of precipitated calcium carbonate yields a gross profit of approximately 677.4 USD/t CO 2 (4567.2 CNY/t CO₂), indicating that the system possesses value-adding potential. The LysK-AMP blended amine system developed in this study combines high capture efficiency, low regeneration energy consumption, and excellent cyclic stability, providing a theoretical basis and experimental verification for the industrial application of IAM technology.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yifang Sun,Xiongwei Yang,Hao Zhou,Xinxin Zhao,Yao Shen,Jingkai Zhao,Jiexu Ye,Chenghang Zheng,Shihan Zhang,Xiang Gao
CO 2 emissions from industrial processes are becoming a growing global concern due to their impact on climate change. Catalyst-aided amine solvent regeneration is an effective approach for achieving low-energy carbon capture. Existing desorption catalysts regenerate amine solutions by accelerating proton transfer during CO 2 desorption, but limited proton transfer efficiency under alkaline conditions leads to inevitable deactivation of active sites. Herein, we developed TiO 2 /Ti 3 C 2 , a TiO 2 nano-islands structured catalyst via in situ oxidation of Ti 3 C 2 T x MXene nanosheets. The remaining MXene enhances electron transfer between TiO 2 nano-islands, promoting CO 2 desorption-induced solvent regeneration through proton-coupled electron transfer effect via Raman spectroscopy and low-temperature electron paramagnetic resonance experiments. Theoretical calculation demonstrates that TiO 2 /Ti 3 C 2 reduce the energy barrier of solvent regeneration by 44.9 % compared to the non-catalytic scenario. The CO 2 desorption rate increased by 150 %, while the relative energy penalty of the solvent regeneration decreased by 75 %. The regeneration temperature was reduced from 120 °C to 98 °C with an amine-based biphasic solvent, effectively preventing ~28 % of amine degradation. Additionally, TiO 2 /Ti 3 C 2 demonstrates exceptional stability, showing negligible performance degradation and structural changes after 10 cycles. This work offers valuable insights for designing catalysts to achieve efficient and robust CO 2 capture.
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NEW JOURNAL OF CHEMISTRY
·
2026
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IF 2.5
Jian He,Menghan Lu,Xinggang Wu,Haobo Gou,Ning Zhang,Zhiqiang Xu
The steel industry faces the dual pressures of carbon reduction and ultra-low emissions throughout production, making integrated CO2 capture and deep desulfurization of blast furnace gas essential. Conventional alcohol amine-based scrubbing agents have limitations such as low absorption capacity, regeneration difficulties, and high corrosivity. To address these issues, a CO2, COS (carbon oxysulfide), and H2S integrated high-efficiency removal biphasic absorbent was developed. The novel biphasic absorbent composed of sulfolane (SF), diethanolamine (DEA), 2-amino-2-methyl-1-propanol (AMP), piperazine (PZ), and H2O, achieved a removal rate of over 90% for CO2, COS, and H2S, under the tested conditions, while exhibiting low rich-phase viscosity and acceptable anti-corrosion performance. Optimal regeneration was attained at 110–120 °C, with regeneration efficiencies exceeding 85% and an estimated energy consumption of approximately 2.51 GJ per ton CO2 (about 33.9% lower than 30 wt% MEA), while exhibiting stable cyclic regeneration. Spectroscopic analyses (FTIR, 1H/13C NMR) indicate that H2S undergoes proton transfer to amine sites to form bisulfide containing quaternary ammonium salts, whereas CO2 and COS react with amine functionalities to yield carbamate and thiocarbamate species that preferentially partition into the aqueous-rich phase; sulfolane remains in the organic phase, enabling liquid–liquid separation. This research provides a promising basis for simultaneous pollution control and CO2 mitigation in the steel sector, aligning ultra-low emission targets with decarbonization efforts and offering potential environmental and economic benefits.
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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.
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Polymers
·
2022
·Vol. 14
·期 23
·5295
·
IF 4.967
Ling Zhang,Junlu Sheng,Yongbo Yao,Zhiyong Yan,Yunyun Zhai,Zhongfeng Tang,Haidong Li
Waterproof breathable functional membranes have broad application prospects in the field of outdoors textiles. The fluorine-containing microporous membranes of the mainstream functional products easily cause harm to the environment, and thus, the fluorine-free environmental nanofibrous membranes are an important development direction for functional membranes. In this subject, the electrospun polyacrylonitrile nanofibrous membranes were first hydrophobically modified by amino functional modified polysiloxane (AMP), followed by in situ cross-linking modified with 4, 4’-methyl diphenylene diisocyanate (MDI). The fluorine-free modification by AMP altered the surface of the membranes from hydrophilic to hydrophobic, and greatly improved the waterproof properties with the hydrostatic pressure reaching to 87.6 kPa. In addition, the formation of bonding points and the in situ preparation of polyuria through the reaction between the isocyanate in MDI and the amino group in AMP, could improve the mechanical properties effectively. When using AMP with the concentration of 1 wt% and MDI with the concentration of 2 wt%, the relatively good comprehensive performance was obtained with good water resistance (93.8 kPa), modest vapor permeability (4.7 kg m−2d−1) and air permeability (12.7 mm/s). Based on these testing data, the modified nanofibrous membranes had excellent waterproof and breathable properties, which has future potential in outdoor sports apparel.Keywords:electrospun polyacrylonitrile membranes;fluorine-free hydrophobic modification;amino functional modified polysiloxane;in situ cross-linking reaction;waterproof breathable
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PubMed
高影响因子
ENERGY
·
2023
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IF 9
Xiaobin Zhou,Chao Liu,Jie Zhang,Yinming Fan,Yinian Zhu,Lihao Zhang,Shen Tang,Shengpeng Mo,Hongxiang Zhu,Zongqiang Zhu
Biphasic solvents are regarded as promising candidates for CO 2 capture but still suffer from the deficiency of inferior regenerability, which negatively affects their energy-saving potential. 2-Amino-2-methyl-1-propanol (AMP)-based absorbents have superior regenerability but poor phase-change performance. In this study, an effective strategy that using tetraethylenepentamine (TEPA) to regulate the phase change behavior of an AMP-pentamethyldiethylenetriamine (PMDETA) aqueous solution was proposed, aiming to develop a novel AMP-PMDETA-TEPA (A-P-T) biphasic solvent with good regenerability and excellent phase separation performance. The A-P-T biphasic solvent could realize a high CO 2 loading of 0.73 mol mol −1 and a high desorption efficiency of 75.3%. Its sensible heat requirement significantly decreased to 0.14 GJ·ton −1 CO 2 , 78.1% less than the monoethanolamine solution. The 13 C NMR characterization and quantum chemistry calculations indicated that with the introduction of TEPA, high polar TEPA-associated products were generated, which broke the original assimilation state of the A-P-T system and drove it to undergo phase change. Since the TEPA-associated products had a strong affinity to other CO 2 -captured products and H 2 O, they gathered together to form the CO 2 -rich phase. In contrast, less polar PMDETA showed a relatively weak affinity to the TEPA-associated products and was solely separated from the solution to form the CO 2 -lean phase.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
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IF 8.2
Pengwu Xu,Gaopeng Qi,Dongxuan Lv,Deyu Niu,Weijun Yang,Huiyu Bai,Xiuping Yan,Xu Zhao,Piming Ma
Polyhydroxyalkanoates (PHA) is a biodegradable polyester, and its application range is limited by the poor flame retardancy and low modulus. Bentonite (BNT) as a green inorganic filler can improve the modulus and flame retardancy of PHA to a certain extent. An in situ polymerization method was designed to intercalate P-N-containing hyperbranched macromolecules (HBM) among BNT layers (HBM-B) and to improve the flame retardancy while improving the dispersion of BNT in the PHA matrix. The layer spacing of BNT was increased from 1.2 nm to 4.5 nm. The effect law of the joint action of in situ intercalation of BNT and the HBM on flame retardancy and mechanical properties of PHA was systematically studied. The HBM-B showed stronger flame retardancy when the mass ratio of HBM to BNT was 75/25. The limiting oxygen index (LOI) of the PHA/HBM-B composite was increased to 27.6 % while maintaining good toughness. Compared to the physical blend of HBM and BNT (HBM/B), the elongation at break of PHA/HBM-B 25 composites can be increased by up to 10 times. When the content of HBM-B is up to 15 wt%, the LOI of PHA-Based composites can reach 29.6 % and the UL-94 rating reaches V-0, which meets the standard of flame-retardant material. Therefore, the present work is expected to expand the application of PHA-based composites in the field of flame retardancy.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Bin Jiang,Rongwei Guo,Taotao Fu,Chunying Zhu,Youguang Ma
For gas–liquid two-phase flow in comb-shaped microchannels, operating conditions could change the flow pattern and the uniformity of flow distribution and further affect the mass transfer performance. In this study, the hydrodynamics and mass transfer of gas–liquid two-phase flow in comb-shaped microchannels are investigated. Four flow patterns are observed: single-phase or foam flow, slug-bubbly flow, slug flow, and compact slug flow. When the flow pattern is slug flow, the flow distribution and velocity distribution in the microchannel are ideal, and its mass transfer performance is close to that of a single microchannel. Before the appearance of slug flow, the uniformity of flow distribution and mass transfer performance are improved with the increase of the ratio of gas–liquid flow rate. After the appearance of slug flow, the uniformity of flow distribution and mass transfer performance are deteriorated with the increase of the ratio of gas–liquid flow rate.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Zhifang Tu,Fei Han,Chao Liu,Yingxue Wang,Jianwen Wei,Xiaobin Zhou
Solid-liquid phase-change absorbents (SLPCAs) have a great potential to reduce the energy consumption of CO 2 capture. The main issue in the practical application of SLPCAs is the difficulty in the phase separation of gelatinous solid products. In this study, 2-amino-2-methyl-1-propanol (AMP) was used as a regulator to tune the physical form of the solid products of triethylenetetramine (TETA)-based SLPCAs. Experimental results showed that the AMP-regulated TETA-based SLPCAs successfully avoided the formation of gelatinous products (viscosity up to more than 1000 mPa·s) and yielded easily separated crystalline powders. Among the investigated SLPCAs, TETA/AMP/ N -methyl-2-pyrrolidone (NMP) (TETA:AMP = 2:8, 1 M) exhibited the best CO 2 capture performance with a high CO 2 loading of 0.94 mol·mol −1 and a high regeneration efficiency of 84.14 %. XRD, FT-IR and 13 C NMR analyses indicated that TETA/AMP/NMP absorbed CO 2 to form highly polar carbamate species and protonated amines, which could break the original assimilation state of the SLPCA system; thus, the polar products precipitated out from less polar NMP, leading to a phase change. The theoretical calculations revealed that in the absence of AMP, the TETA-derived products had a tendency to form gelatinous aggregation with large amounts of hydrogen bonds; with the introduction of AMP, the AMP-derived products tended to combine with the TETA-derived products via strong electrostatic attraction and Van der Waals force and effectively inhibited the aggregation formation. Since there was only one hydrogen bond forming between the AMP- and TETA-derived product molecules, the amount of hydrogen bonds was significantly reduced. Eventually, the TETA/AMP/NMP SLPCA avoided the formation of gelatinous products and yielded crystalline powder products.
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危险品化学品经营许可证（带存储）