PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2023
·Vol. 25
·期 33
·21944-21956
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IF 3.3
Zhen Wang,Chenteng Sun,Qian Xu,Xingli Zou,Hongwei Cheng,Xionggang Lu
Alkali and alkali earth oxides show good CO2 capture performance for carbonation, while their regeneration occurs at high temperatures, leading to a high energy penalty. When alkali oxides and alkali earth oxides combine with SiO2 to form oxysalts, the regeneration temperatures can be reduced, and the CO2 adsorption capacity is maintained. In this study, the reaction between CO2 and Li2CaSiO4, composed of stoichiometric CaO, Li2O, and SiO2, was evaluated thermodynamically by DFT. The synthesized Li2CaSiO4 with and without alkali carbonates was used as CO2 sorbents, and their CO2 adsorption performances were examined using thermal analyses. The phase and morphology of Li2CaSiO4 before and after CO2 adsorption were characterized by XRD and SEM. According to the thermodynamic evaluation and the XRD results, Li2CaSiO4 could adsorb CO2 and form CaCO3 and Li2SiO3. The thermal analyses showed that the regeneration of Li2CaSiO4 started from 575 °C, at which it was difficult to realize the CO2 diffusion through the solid CaCO3 product layer. The mixed alkali carbonates can improve the kinetics and facilitate the CO2 adsorption of Li2CaSiO4. Alkali carbonates were effective in reducing the activation energy of the reaction and CO2 diffusion at low temperatures and improving the cyclic stability because of the dispersing carbonation products.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lianlong Zhan,Wei Lu,Qin Xiang,Zhiping Chen,Wenlu Luo,Cailin Xu,Renting Huang,Shuagnfei Wang,Hui He
Using biomass for the production of low-energy regenerative carbon capture materials represents an effective strategy to advance carbon dioxide capture and storage technologies. In this study, a low-energy regenerative bagasse-based CO 2 capture material is synthesized through a one-step, rapid crosslinking strategy. In this method, epichlorohydrin is used to crosslink bagasse with temperature sensitive Pluronic® F-127 and polyethyleneimine, thereby addressing the challenge of simultaneously incorporating multiple functional groups into the biomass matrix. The resulting material with abundant amino adsorption sites demonstrates a high adsorption capacity of 4.52 mmol/g. Interestingly, the temperature-sensitive response of the material facilitates the grafted amine chain segments on bagasse to stretch and shrink reversibly within a narrow temperature range of 25 °C for adsorption and 55 °C for desorption. The shrinkage state is conducive to the CO 2 desorption process, resulting in an ultralow regeneration temperature of 55 °C. Additionally, the water contained in the material enhances its cyclic stability in extreme environments, such as pure CO 2 atmosphere at high temperature. Overall, this research not only provides new ideas for enhancing the long-term stability and economic viability of CO 2 capture materials but also offers feasible solutions for combating climate change and promoting sustainable development.
研究领域:
材料科学
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环境科学
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生物质工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Jiehan Lin,Wei Lu,Xiaoyu Shi,Qin Lu,Lei Wang,Hui He
Solid amine adsorbents cannot typically maintain desirable CO2 capture capacity while having ultralow regeneration temperatures. To address this issue, a novel thermoresponsive nanofiber-based solid amine adsorbent (TRCNF/PEIA) with high amino density and high content of thermoresponsive intelligent groups was designed and prepared using epichlorohydrin to rapidly cross-link polyethyleneimine (PEI) and a thermoresponsive cellulose nanofiber (TRCNF). The latter was obtained by grafting N-isopropylacrylamide (NIPAm) on the cellulose nanofiber (CNF) through Ce (IV)-initiated free radical polymerization. The as-prepared TRCNF/PEIA simultaneously showed high capture capacity (6.74 mmol/g) with water at 25 °C and a low regeneration temperature (60 °C). A comparison of the adsorption–desorption properties of TRCNF/PEIA with those of the PEIA, which was prepared using a procedure similar to that of TRCNF/PEIA but without TRCNF, showed that the thermoresponsive property of PNIPAm and the synergy of the hydroxyl groups of TRCNF/PEIA could facilitate CO2 complete desorption from the adsorbent at 60 °C, which was the lowest regeneration temperature to maintain the high adsorption capacity (≥6 mmol/g) of the adsorbents, based on the literature reports.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2019
·
IF 0
Akram Entezari,Mojtaba Ejeian,R.Z. Wang
Water scarcity is a current concern and a future problem. Air-water harvesting (AWH) is a novel proposed solution to provide enough water for human-being's needs especially in remote areas. However, the sorbent material is one of the challenging components of these systems. Generally, a proper sorbent must have a high water uptake capacity, a low regeneration temperature and an easy replacement structure, suitable to deploy in the bed. Here we synthesized three active carbon felt composites with a layer structure and analyzed their potential for being used in AWH systems. The performance of these ACFs composites concerning three different salts was investigated. Experimental results showed that the highest capacity is 2.9 g water per g sorbent at 70% of RH without any leakage. Also, pore parameters, non-equilibrium and equilibrium adsorption, regeneration temperature, recyclability and thermal diffusivity of samples were tested. The thermodynamic cycle of the system is studied, and a three-phase sorption cycle is proposed in this study. The detailed analysis reveals that the presence of the combined use of adsorption-absorption process can improve the sorption capacity extensively. The experimental and theoretical studies proved that these composites are very promising materials for water harvesting applications. To demonstrate these materials capability, a prototype is proposed which adopts these materials as its desiccant. This small prototype automatically could harvest 1.51 g of fresh water per cycle per g of sorbent at RH of 70%, without any human involvement.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qin Xiang,Wei Lu,Lianlong Zhan,Lei Wang,Lingping Xiao,Runcang Sun,Shuangfei Wang,Hui He
Designing an energy-saving carbon breathing paper offers the substantial potential for life support systems owing to its effective removal of low-level CO 2 . Here, an energy-saving carbon breathing paper was tailored by the rigid-flexible interlocking of cellulose molecules with polyethyleneimine and poly-N-isopropylacrylamide. Abundant amino groups (14.98 mmol/g) on paper could capture CO 2 (6.47 mmol/g) to form carbamic acid, which further generated the difficult-to-decompose urea through dehydration and nucleophilic addition reactions, leading to higher regeneration temperature. Interestingly, the excellent temperature sensitivity of the paper endows stretch-to-shrink molecular state transitions, increased the amino surface electrostatic potential, passivated nucleophilic addition activity and regulated carbamic acid towards thermal decomposition, effectively reduced regeneration temperature to 55 °C. More encouragingly, water, which is rich in paper, prevented the formation of urea, improving the cycle stability in extreme environments, such as high temperatures and pure CO 2 atmosphere. The result of 30.67 % life extension in mice in confined spaces indicates that the TCBP is a promising candidate for cost-effective carbon removal of life support systems.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenlu Luo,Wei Lu,Qin Xiang,Lianlong Zhan,Xun Yang,Hanbing Jiang,Cailin Xu,Hui He
The utilization of the solar-driven CO 2 desorption of carbon capture materials opens a promising avenue to reduce energy consumption in the carbon capture process. A crucial aspect is the careful coordination of materials' adsorption capacity and regeneration temperature. In this study, a photothermal responsive carbon capture material was developed by incorporating a photothermal responsive cellulose nanofiber matrix skeleton with a temperature-sensitive Pluronic® F-127 and polyethyleneimine. These components formed a staggered network through crosslinking with epichlorohydrin. The devised preparation strategy demonstrated a remarkable conversion rate of 99% for the reaction reagents. The resulting carbon capture material exhibited a high amino density of 14.18 mmol/g and a substantial adsorption capacity of 6.92 mmol/g. Notably, the shrinkage of Pluronic® F-127 molecular chains at elevated temperatures led to an increased surface electrostatic potential and the passivation of amino groups. This transformation endowed the material with a solar-driven regeneration temperature as low as 55 °C, representing an efficient approach to reduce energy consumption during the regeneration process of carbon capture materials.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Huajun Zhao,Hongmei Wang,Zixuan Wang,Mengfan Wang,Rujie Wang,Qiangwei Li,Lidong Wang
Tertiary amine-based biphasic solvents exhibit desorption properties, which is beneficial for reducing energy consumption. A DEEA/AMP/2-Me/H 2 O biphasic solvent was proposed. DEEA, a tertiary amine, was used as the main absorbent, 2-Me served as a phase splitter, and AMP functioned as an activator. The introduction of AMP (4 %) raised the CO 2 loading from 3.83 to 4.10 mol/L, constituting 95.7 % of captured CO 2 . Moreover, the absorbent demonstrated robust cyclic stability and exceptional desorption ability at low temperatures, attributable to its deprotonation regeneration mechanism. Notably, it achieved a remarkably high desorption capacity of 3.61 mol/L at 363.15 K, accompanied by a desorption efficiency of up to 88.0 %. These values surpassed those of 30 wt% MEA, which exhibited a desorption capacity of 1.73 mol/L and an efficiency of 58.8 % at 393.15 K, by 209 % and 150 %. Given that 363.15 K was beneath the boiling point of H 2 O, the Q latent was exceptionally minimal (0.034 GJ/t CO 2 ), leading to a remarkably decreased regeneration heat (1.51 GJ/t CO 2 ). A combination of NMR analysis, DFT and MD simulations was utilized to elucidate the phase separation mechanism. The primary factor contributing to phase separation was identified as the formation of a robust hydrogen bonding network among the absorption products.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Yangxu Qu,Deyi Mi,Mingyu Guo
Desiccants play crucial importance in both daily life and industrial production. The development of low-cost and easy industrial scale production all-polymer solid desiccants with high water adsorption capacity, low regeneration temperature, and fast sorption kinetics remains great challenges. Herein, we report a novel all-polymer porous solid desiccant (APPSD) with high moisture capture capacity, low regeneration temperature, and fast sorption kinetics via a new zero-waste, eco-friendly, and easily scaled-up process. The present APPSD could adsorb 0.8 g/g water vapor at 70% relative humidity (RH) within 1.5 h, and 1.9 g/g at 90% RH within 2.0 h at 25°C, exhibiting fast adsorption kinetics. The equilibrium moisture adsorptive capacity is as high as 2.16 g/g at 90% RH and 25°C, much higher than most reported solid polymer desiccants without hygroscopic salts under the same conditions. Amazingly, more than 92% of the absorbed water could be released at 40°C and 20% RH within 30 min, demonstrating extreme low regeneration temperature and high regeneration efficiency. Furthermore, almost no performance decline was observed during a 20-cycle adsorption–desorption measurement, showing excellent recycling stability. Graphical A novel all-polymer porous solid desiccant (APPSD) with high moisture capture capacity and fast sorption kinetics was developed via a zero-waste, eco-friendly, and easily scaled-up process. The APPSD was prepared by free-radical solution copolymerization using N 2 as an inert shielding gas and porogen, and polymerizable macromolecular surfactant as a foaming stabilizer and cross-linker.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Haorui Liu,Zihao Liang,Shuoyu Wang,Nianfang Ma,Shuixia Chen
A thermosensitive solid amine fiber SF-AM-co-NIPAM-HBP-NH 2 was synthesized by grafting temperature-sensitive monomer N-isopropyl acrylamide (NIPAM) as well as acrylamide (AM) onto the surface of substrate sisal fiber, and further aminating with hyperbranched amine. FTIR, 13 C NMR, SEM, EA and TGA were used to confirm the structure and chemical properties of the grafted fibers. Swelling ratio and CO 2 adsorption-desorption experiment were investigated to verify the thermo-sensitivity of the grafted fibers and their CO 2 adsorption-desorption behavior. Compared with conventional solid amine adsorbents regenerated around 140 °C, SF-AM-co-NIPAM-HBP-NH 2 (1:1) with NIPAM could be regenerated at a much lower temperature of 60 °C, while still maintain a high CO 2 adsorption capacity (2.61 mmol/g), comparable to that of SF-AM-HBP-NH 2 (2.73 mmol/g) before NIPAM introduction. Its excellent regeneration property and the effect of energy consumption reduction make it possible to be used for CO 2 adsorption in industrial process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yong Kong,Zhiting Tan,Fangchen Tang,Xiaodong Shen
The objective of this research is to develop an adsorbent with long-term stability for direct air capture of CO 2 (DAC) under humid conditions. Silica aerogel with amine and methyl hybridized (SA-AM) was synthesized to achieve long-term stability and high CO 2 adsorption performance under humid conditions. SA-AM-M with a moderate precursor concentration exhibited well-developed nanostructure and hydrophobicity, achieving a specific surface area of 306 m 2 /g and a water contact angle of 133°. The CO 2 adsorption capacity of SA-AM-M is 0.97 and 1.14 mmol/g at 25 °C with dry and humid 400 ppm CO 2 , respectively. The CO 2 adsorption capacity mainly depends on the temperature, and lower temperature leads to higher CO 2 adsorption capacity in the range of 5–45 °C. The average adsorption rate shows a positive dependency with gas flow rate, indicating that the working capacity can be improved by increasing gas flow rate significantly. SA-AM-M exhibited the lowest regeneration temperature (65 °C) among reported adsorbents for DAC. The diminishment of CO 2 adsorption capacity is only 35 % after the long-term aging for equivalent 18 months at 25 °C and 65 % relative humidity. This study smoothly combines two different functional groups within the silica aerogel, offering significant guidance towards the development of durable aerogels with high performance for practical DAC.
研究领域:
材料科学
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环境科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 23
·22818-22828
·
IF 2.8
Sun Yanlong,Zheng Tong,Zhang Guangshan,Liu Bei,Wang Peng
The regeneration of adsorbent by thermal method may transfer the adsorbed organic pollutants into the air phase. Herein, manganese and cerium are loaded on adsorbent as catalyst to mineralize the adsorbed organic pollutants during regeneration. The modified adsorbent is characterized by scanning electron microscope-energy dispersive spectrometer, Brunauer Emmett Teller-Barrett Joyner Halenda, and X-ray photoelectron spectroscopy. Regeneration of modified adsorbent is evaluated by adsorbent yield and mineralization percentage of the absorbed organic pollutants. The results demonstrate that the mineralization percentage of tetracycline increased about 100% after the modification. Besides, the loaded catalyst can significantly reduce the regeneration temperature. Furthermore, cerium can reduce the adverse impact causes by manganese which will decrease the adsorption capacity of adsorbent. Kinetics, equilibrium, thermodynamic, and other adsorption properties of modified adsorbent towards tetracycline are further studied. The theoretical maximum of adsorption capacity calculated by Langmuir model is 196.4 mg g −1 , and the kinetics of adsorption fits pseudo-second-order model. The adsorption of tetracycline on the adsorbent is feasible, spontaneous, and endothermic. The properties of synthesized composite material are stable; the yield of Ce/Mn/Al 2 O 3 adsorbent can keep higher than 95% even after five adsorption/regeneration cycles. This research provides another perspective on the design and regeneration of adsorbent, which focus on reducing the secondary pollution during adsorbent regeneration process.
研究领域:
环境科学
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材料科学
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化学工程
✓ 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）