FUEL
·
2022
·
IF 8.035
Huangyu Yan,Guojie Zhang,Ying Xu,Qiqi Zhang,Jun Liu,Guoqiang Li,Yuqiong Zhao,Ying Wang,Yongfa Zhang
In recent years, amine functionalized materials have attracted great interest as prospective solid adsorbents for CO 2 capture. However, the amine functionalization of traditional supports (such as SBA-15, etc.) can lead to a decrease in the pore volume and specific surface area of the adsorbent, which significantly affects the CO 2 adsorption–desorption kinetics. To overcome this problem, the macro-/mesoporous multimodal pore silica was quickly synthesized using a ternary nonionic surfactant as a template through a partitioned collaborative self-assembly method, and impregnated with TEPA. The prepared support HMS-4 h has bimodal pores (pore size of 9.41 nm and 90 nm), which can not only improve the dispersibility of the loaded TEPA, but also effectively reduce the diffusion resistance of CO 2 . At the same time, the high surface area (838 m 2 /g) and large pore volume (2.34 cm 3 /g) of HMS-4 h can further improve the adhesion and quantity of amine-based active sites. The highest adsorption capacity reaches 6.04 mmol/g for HMS-4 h-75%TEPA at 90 ℃ and 1 bar. The adsorption capacity for HMS-4 h-75%TEPA was steady after 10 adsorption–desorption cycles. BET, XRD, FT-IR, SEM, TG-DTG were used to characterize the performance of the adsorbent. The CO 2 adsorption mechanism and the effects of organic amine loading, adsorption temperature and CO 2 concentration on CO 2 adsorption performance were systematically studied. The research shows that HMS-4 h-75%TEPA is an excellent adsorbent with high adsorption capacity in a wide temperature range, and low energy. This provides a reference for the design of high-performance solid amine CO 2 adsorbents in the future.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Shaoliang Zhu,Bingtao Zhao,Yaxin Su
High-efficiency and cost-effective adsorbents are crucial to dry capture of carbon dioxide (CO 2 ). The polyethyleneimine (PEI) was co-impregnated with tetraethylenepentamine (TEPA) on γ-alumina (Al 2 O 3 ) to synthesize the adsorbent and enhance the capture process. The influence of amine loading and operating parameters on CO 2 adsorption was investigated, and the process parameters were modeled. The results depict that the optimal loading is 50 % when functionalized either PEI or TEPA individually, which is 3.7 and 4.6 times higher than γ–Al 2 O 3 . The CO 2 capacity of γ–Al 2 O 3 functionalized with multiple amines (30 %PEI+20 %TEPA) is 2.65 mmol/g, due to the synergies of the two amines to increase the chance of CO 2 binding to the sites. Regeneration performance illustrates that the adsorbent remains at 90.2 % of the initial capacity after seven tests. The maximal capacity of 2.70 mmol/g occurs at 70 °C. Modeling results indicate the kinetics can be evaluated by the Avrami model (R 2 > 0.990) with the activation energy of 5.65 kJ/mol. The process is controlled by physical–chemical adsorption, influenced by intraparticle diffusion, as described by the deactivation model. Finally, a comparison and assessment were conducted for their techno-economic performances, and the pathway to applications was also proposed in engineering practice.
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
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2025
·
IF 3.9
Pengchao Zang,Daokuan Liang,Jiyun Tang,Xiaozhe Wang,Lin Cui,Pei Zhao,Ning Qin,Zeyad Ammar Almutairi,Yong Dong
Adsorbents prepared by impregnating tetraethylenepentamine (TEPA) into porous materials represent promising candidates for CO 2 capture from coal-fired flue gas. This study impregnated TEPA into four types of resins to investigate the influence of different resins on the CO 2 adsorption performance of TEPA-resin adsorbents. Experimental data indicate that the CO 2 adsorption performance of TEPA-resin composites follows the order: DA201D > XAD-2 > ADS-17 > AB-8, where TEPA@DA201D exhibited the highest adsorption capacity of 3.46 mmol/g under 35℃ and 15 vol% CO 2 conditions. TEPA@DA201D possesses a hierarchical mesoporous structure with a high pore volume (1.084 cm 3 /g) and large average pore diameter (20.0 nm), which synergistically enhances CO 2 adsorption by promoting CO 2 diffusion and improving the dispersion of active sites. Simultaneously, SEM images reveal that DA201D exhibits the least aggregation of surface amine groups compared to other adsorbents. Different adsorption kinetic models reveal that its adsorption behavior conforms to the Avrami model, primarily governed by the synergistic effects of physical and chemical adsorption. The rate-limiting steps for CO 2 adsorption by the TEPA@DA201D adsorbent are mainly membrane diffusion and intra-particle diffusion at different temperatures. Furthermore, multifactorial interaction analysis indicates that adsorption temperature, gas flow rate, and CO 2 concentration independently regulate the adsorption capacity of TEPA@DA201D. This work provides theoretical guidance and design strategies for improving the design and performance of organic amine-modified resin-based adsorbents.
研究领域:
环境科学
·
材料化学
·
碳捕集与封存
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhaohao Li,Tianjing An,Jiaxi Yang,Dan Gao,Hongyuan Zhang,Heng Zhang
Capturing CO 2 from the flue gas in the power plant is an important measure to realize the low-carbon combustion of the fossil energy. This paper presents a novel technique which combines traditional methods of the chemical absorption, the physical adsorption and the membrane absorption. The ionic liquid ([TEPA][MIm]) is utilized to improve the CO 2 absorption performance and reduce the energy consumption. While the porous skeleton (ZIF-8) is added to the ionic liquid to reduce the viscosity while introducing the physical adsorption. Moreover, the hydrophobic ceramic membrane is utilized as the separation interface between the gas phase and the liquid phase, which can avoid the entrainment and overflow of the liquid phase while increasing the specific surface area. In terms of the material preparation and the characterization, the addition of ZIF-8 does not destroy the original chemical composition of [TEPA][MIm]. The average contact angle of the hydrophobic ceramic membrane is 140.55°, and the failure temperature is greater than 400 K, which conforms to the application situation of the power plant. In terms of the CO 2 capture and the desorption performance, the maximum CO 2 capture amount reaches 2.03 mol/mol. The temperature of complete desorption is 70 °C. Furthermore, the capture performance after five cycles can reach 80 % of the initial performance. The performance is better than that of the CO 2 capture technology utilizing the traditional monoethanolamine solution.
研究领域:
能源与环境工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Wenchao Wang,Fashe Li,Hua Wang
The oxidation stability and lubrication properties of biodiesel have been the focus of research, this study focuses on the oxidation and lubrication properties of TEPA on biodiesel and its anti-oxidation and lubrication mechanisms. The Rancimat method was used to study the oxidation resistance of TEPA. The results showed that when 3‰ of trace TEPA was added, the oxidation performance of Jatropha biodiesel was improved by 11.41 times, and the stability factor of TEPA's antioxidant activity is greater than 1 under micro conditions, and the oxidation resistance was significantly improved. The kinetic parameters and thermodynamics of the oxidation degradation process of TEPA were analyzed. The results showed that the kinetic activation energy was 86.756 kJ mol −1 , the reaction order was 1, the frequency factor A is 1.235 × 10 11 , the thermodynamic activation entropy was −43.059 J mol −1 K −1 , by the results shown, the existence of an endothermic and non-spontaneous process and the antioxidant product of TEPA was a good free radical inhibitor. The High Frequency Reciprocating Rig (HFRR) was used to study the lubricating performance of TEPA for Jatropha biodiesel at different temperatures (40 ℃–80 ℃) and different adding amount (0–2.5 wt.%). The average friction coefficient of Jatropha biodiesel with the addition of 2.5‰ TEPA decreased by 88.89 % (at 40 ℃), and the lubrication performance was greatly improved, However, the increase in temperature will have a greater impact on the lubrication improvement effect of TEPA. When the experimental temperature is, 50 ℃, 60 ℃, 70 ℃, 80 ℃, the average friction coefficient when adding 2.5‰ TEPA decreases respectively. 81.82 %, 76.92 %, 57.14 %, 52.94 %, the lubrication improving effect of Jatropha biodiesel gradually decreases. The high viscosity characteristics of TEPA and the ability to chelate metal ions in biodiesel are the main reasons for improving the lubricating performance of biodiesel.
研究领域:
能源科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Jiaxi Yang,Dan Gao,Heng Zhang,Qun Yi
The efficient capture of carbon dioxide (CO 2 ) by porous ionic liquids (PILs) has become one of the important ways to deal with the greenhouse effect and enhance environmental protection. In order to enhance the CO 2 capture efficiency of PILs, 2 amino-functional ionic liquids (ILs) were synthesized in deionized water: tetraethylenepentamine-2-methylimidazole ([TEPA][MIm]) and diethylenetriamine-2-methylimidazole ([DETA][MIm]). 2 zeolite imidazolidin-8 frames (ZIF-8-W and ZIF-8-M) were prepared in methanol and deionized water. The performance of the material was verified through FT-IR infrared spectroscopy, TGA-DTG curves, XRD spectra, adsorption desorption curves, and corrosive changes. Based on this, the porous ionic liquid ZIF-8-W/[TEPA][MIm] with the best performance and ZIF-8-W with the best environmental friendliness were successfully constructed. The chemical reaction mechanism of CO 2 in PILs were explored. The results showed that the thermogravimetric temperature of all materials was greater than 370 K, and the difference in adsorption capacity between ZIF-8-W and ZIF-8-M was only about 36.3 ml/g, the maximum mass change rates of the two ILs after immersion in ceramic and stainless steel tubes for 7 days were only 0.78 % and 0.29 %, respectively. On the premise of ensuring fluidity, the maximum capture capacity of ZIF-8-W/[TEPA][MIm] for pure CO 2 reached 2.22 mol/mol PILs, and the maximum capture capacity for CO 2 in artificial flue gas reached 2.03 mol/mol PILs, which was 21.9 % and 31.6 % higher than the maximum capture capacity of pure ionic liquids, respectively. When [TEPA][MIm] in PILs reacts with CO 2 , it conforms to the characteristics of “zwitterions”.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123938
·
IF 7.5
Yanli Wang,Wenqing Xu,Tingyu Zhu,Zhikun Zhang
The severe self-aggregation and instability of polyamines at high loadings remain major mass-transfer limitations in solid amine sorbents. To overcome this kinetic limitation, we propose a molecular-level regulation strategy by incorporating trace Ni (1 wt%) into tetraethylenepentamine (TEPA) confined within a hierarchical porous geopolymer-zeolite framework. Rather than acting as a conventional promoter, the intentionally introduced Ni forms specific Ni-TEPA coordination complexes, which significantly disrupted the intermolecular hydrogen-bonding network and inhibited polyamine aggregation. Consequently, the Ni-modified sorbent effectively alleviated diffusion resistance, exhibiting substantially improved amine accessibility and accelerated adsorption kinetics. Density functional theory (DFT) combined with spectroscopic analyses revealed that Ni coordination systematically reduced the electron density around the amine nitrogen sites, substantially lowering the apparent adsorption activation energy to 8.28 kJ/mol. Under simulated post-combustion conditions (15 vol% CO 2 , 70 °C), the optimized sorbent achieved a high CO 2 uptake of 3.92 mmol/g and retained 99.75% of its initial capacity after 10 cycles. Furthermore, utilizing waste-derived zeolite-geopolymer (from municipal solid waste incineration and coal fly ash) as the robust support yields a potentially attractive manufacturing cost of 158.99 ¥/kg, providing a sustainable and scalable chemical engineering approach for industrial flue gas treatment.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Si Chen,Xin He,Pan Li,Lingling Li,Meng Wang,Yulin Li,Qi Xu,Yanxia Sun,Chunxi Hai,Shengde Dong,Luxiang Ma,Yuan Zhou
Carbon nanofibers (CNFs), renowned for their high specific surface area and porosity, exhibit significant potential in applications such as energy storage, catalysis, and gas adsorption. However, the affinity of typical CNFs for CO 2 in direct air capture scenarios is compromised by less partial pressure of CO 2 in the atmosphere. In contrast, amine-functionalized materials, especially those incorporating tetraethylenepentamine (TEPA), which possesses a strong propensity for CO 2 , are recognized for their efficacy in CO 2 capture. This study aimed to develop amine-functionalized adsorbents by integrating TEPA into electrospun CNFs. The synthesized material's structural properties were examined using BET, TGA, and FTIR. The effects of amine content, temperatures, and relative humidity on the CO 2 adsorption/desorption dynamics of CNF-TEPA50 within a fixed-bed system were evaluated. The results showed that, at 35 ℃, 1 bar pressure, and 40 % RH, the material achieved its highest adsorption capacity of 3.75 mmol/g for a 0.04 vol% CO 2 mixture. The adsorption/desorption kinetics align with various models, indicating suitability for complex processes. This study underscores the potential of TEPA-modified CNFs for capturing CO 2 at ultralow concentrations, thereby contributing to the advancement of CO 2 mitigation technologies.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 22
·7467-7474
·
IF 6.119
Yangfan Ming,Gang Li
When Cu–TEPA (Cu2+ coordinated with tetraethylenepentamine) is used as a template in the one-pot synthesis of Cu–SSZ-13, Cu2+ will be reduced to Cu0, resulting in a too high Cu content in the product. Herein, by adding iron complexes to the precursor, the reduction of Cu2+ could be inhibited and FeCu–SSZ-13 samples with rational Cu and Fe contents were prepared by a simple one-pot strategy. Although these samples show high activity in the NH3-SCR at low temperature, their high temperature performance is poor due to the lack of strong NH3 adsorption sites such as Brønsted acid sites. Meanwhile, different iron complexes were used as iron sources to synthesize FeCu–SSZ-13, and among them the sample with sodium nitroprusside shows the highest activity. Due to the large ionic radius of K+, it is easily retained which blocks the pores, so the performance of the samples synthesized with a K-type iron source is poorer than that of their Na-type counterparts. Moreover, the activity of the catalyst synthesized with an Fe3+ source is higher than that synthesized with an Fe2+ source because the valence state of Fe sources has a great influence on the Fe chemical state in the catalysts.
研究领域:
催化化学
·
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
·
2025
·
IF 9
Shah Faisal,Zia Ahmad,Haitao Shi,Haijun Zhang,Jiping Chen
The consistent rise in atmospheric CO 2 concentrations demands the development of efficient and stable adsorbents for carbon capture technologies. Herein, we report a novel cerium-incorporated hierarchical mesoporous silica functionalized with Tetraethylenepentamine (Ce-HMS@TEPA), characterized and tested under simulated flue gas conditions (10 vol% CO 2 ) to investigate the influence of Ce incorporation and TEPA functionalization on CO 2 adsorption. Strategic Ce incorporation forms Si-O-Ce bonds that boost Lewis acidity, reinforce structural stability, and prevent pore collapse, while facilitating uniform TEPA dispersion. The optimal Ce 0.1 -HMS@TEPA (55.8 %) achieved 3.82 mmol/g CO 2 capacity at an 80 °C/0.15 bar pressure under dry conditions, which was further increased to 4.61 mmol/g under humid conditions. Comprehensive characterization (XRD, BET, TGA) confirmed the preserved pore structure and thermal stability, while the TPD analysis identified distinct CO 2 binding mechanisms. Crucially, Ce-HMS@TEPA retained 93.5 % capacity over 40 cycles (120 °C regeneration), and rapid adsorption kinetics (Avrami model: R 2 > 0.99) outperforming its Ce-free (HMS@TEPA) counterpart. This synergistic interaction of Ce incorporation and TEPA functionalization ensures high CO 2 affinity, rapid adsorption kinetics, and remarkable performance, establishing Ce-HMS@TEPA as a next-generation adsorbent in advancing sustainable carbon capture technologies.
研究领域:
材料科学
·
环境工程
·
碳捕集与封存
·
吸附技术
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Xingji Zhang,Pu Huang,Chuanwen Zhao,Xinkuan Yu,Yiqian Yao
Direct air capture (DAC) technology is a key pathway to achieving carbon neutrality, but its commercialization remains constrained by the high cost of adsorbents and the synergistic effect between pore structure and amine utilization. This study investigates the influence of carrier pore size and pore type on carbon dioxide adsorption and the economic feasibility of DAC technology for industrial applications. We loaded tetraethylenepentamine (TEPA) onto three carriers via physical impregnation: activated carbon (AC), Mobil Composition of Matter-41 (MCM-41), and Santa Barbara Amorphous-15 (SBA-15), which differ in cost and pore structure characteristics. The results showed that the AC adsorbent had an adsorption capacity of 1.25 mmol/g at 70 % TEPA loading. The MCM-41 and SBA-15 adsorbents exhibited higher adsorption capacities at a 60 % TEPA loading, with values of 1.94 mmol/g and 2.61 mmol/g, respectively. The costs of the three adsorbents were 30$/kg, 150$/kg, and 700$/kg, respectively. Comparing different capture modes, the annual CO 2 capture capacity of 60-TEPA/MCM-41 and 60-TEPA/SBA-15 in the quick capture mode is 1.58 times and 2.11 times higher than that in the complete capture mode, respectively. However, the annual capture capacity of 70-TEPA/AC is slightly lower in the quick capture mode. Further analysis revealed that, based on the quick capture mode, the overall cost of 60-TEPA/MCM-41 was 472$/tCO 2 , achieving a balance between capture performance and cost-effectiveness.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Song Zhou,Yunlong Zhu,Hongyuan Xi,Ze Hao,Zhitao Han,Chengqi Sun
Large–scale CO 2 emissions have raised international concerns as they lead to global temperature rise. Consequently, mitigating CO 2 emissions has emerged as a central focus of interdisciplinary research. Although onboard carbon capture technology proves effective in reducing a ship's CO 2 emissions, challenges persist in the form of high desorption energy consumption and low CO 2 loading of the absorbents. In this study, a novel polyamine–based mixed amine system based on marine engine exhaust CO 2 capture technology has been developed to reduce desorption energy consumption and enhance CO 2 loading. Additionally, the reaction mechanisms of CO 2 with polyamine–based mixed amine were investigated using a combination of quantum chemical calculations and nuclear magnetic resonance (NMR) techniques. The results indicated that compared to monoethanolamine (MEA) with the same mass fraction, the CO 2 loading of the new mixed absorbent tetraethylenepentamine (TEPA) + MEA increased by 7 % and the desorption heat duty reduced by 18.1 %. The analytical approach results showed that in the case of 7.5 wt% TEPA + 7.5 wt% MEA solution, proton transfer was predominantly governed by TEPA, whereas MEA primarily engaged in the reaction with CO 2 . During desorption at 368 K, the released CO 2 primarily arose from HCO 3 − and CO 3 2− . These findings hold academic and practical significance for the advancement of more efficient carbon capture technologies in maritime applications.
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
危险品化学品经营许可证（带存储）