APPLIED ENERGY
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2024
·
IF 10.1
Yingjie Niu,Ting Li,Ali Hassan Bhatti,Jiaqi Qu,Xin Zhou,Li Luo,Francesco Barzagli,Chao'en Li,Rui Zhang
The use of solid acid catalysts for sorbent regeneration is an emerging approach to improve the energy efficiency of CO 2 capture processes. In this study, fly ash (FA), an industrial byproduct rich in acid/base sites, was chosen as a support material for the solid acid SO 4 2− /ZrO 2 (SZ) in the preparation of SZ@FA composite catalysts. Three catalysts with different mass ratios between SZ and FA were synthesized and evaluated in the regeneration process at 88 °C of a CO 2 -saturated MEA solution. Their desorption performance, expressed as CO 2 desorption rate, amount of CO 2 desorbed , and heat duty, was then compared with that obtained with unmodified FA, ZrO 2, and in the absence of catalysts (blank), under identical operating conditions. Compared to the uncatalyzed system, the SZ@FA composite catalysts showed significantly better desorption performance. In particular, SZ@FA-1/2 provided the highest values of desorption rate and cyclic capacity while reducing energy consumption by 45.4% compared to the blank system. It also demonstrated stability over 20 consecutive absorption-desorption cycles. Comparison with other reported catalysts highlighted the high performance of SZ@FA-1/2, particularly in terms of relative heat duty reduction, positioning it as a cost-effective and environmentally friendly choice for post-combustion capture applications.
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
Nanomaterials
·
2025
·Vol. 15
·期 9
·638
·
IF 4.3
Xiangyun Zha,Depeng Gong,Wanyu Chen,Lili Wu,Chaocan Zhang
Copper nanowires (Cu NWs) are considered a promising alternative to indium tin oxide (ITO) and silver nanowires (Ag NWs) due to their excellent electrical conductivity, mechanical properties, abundant reserves, and low cost. They have been widely applied in various optoelectronic devices. In this study, Cu NWs were synthesized using copper chloride (CuCl 2 ) as the precursor, monoethanolamine (MEA) as the complexing agent, and hydrated hydrazine (N 2 H 4 ) as the reducing agent under strongly alkaline conditions at 60 °C. Notably, this is the first time that MEA has been employed as a complexing agent in this synthesis method for Cu NWs. Through a series of experiments, the optimal conditions for the CuCl 2 –MEA–N 2 H 4 system in Cu NWs synthesis were determined. This study revealed that the presence of amines plays a crucial role in nanowire formation, as the co-ordination of MEA with copper in this system provides selectivity for the nanowire growth direction. MEA prevents the excessive conversion of Cu(I) complexes into Cu 2 O octahedral precipitates and exhibits an adsorption effect during Cu NWs formation. The different adsorption tendencies of MEA at the nanowire ends and lateral surfaces, depending on its concentration, influence the growth of the Cu NWs, as directly reflected by changes in their diameter and length. At an MEA concentration of 210 mM, the synthesized Cu NWs have an average diameter of approximately 101 nm and a length of about 28 μm. To fabricate transparent conductive films, the Cu NW network was transferred onto a polyethylene terephthalate (PET) substrate by applying a pressure of 20 MPa using a tablet press to ensure strong adhesion between the Cu NW-coated mixed cellulose ester (MCE) filter membrane and the PET substrate. Subsequently, the MCE membrane was dissolved by acetone and isopropanol immersion. The resulting Cu NW transparent conductive film exhibited a sheet resistance of 52 Ω sq −1 with an optical transmittance of 86.7%.
研究领域:
材料科学
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纳米技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Yi Wang,Yucong Ge,Li Yang,Fang Liu,Qingfang Li,Yi Li,Kunlei Liu
MEA aqueous solution is widely utilized as an absorbent in chemical absorption processes. However, it is challenged by many disadvantages, including low regeneration capacity and high energy consumption during regeneration. In this study, new no-aqueous MEA absorbents were prepared using alcohol ether organic solvents, including proprylene glycol monomethyl ether (PGME), ethylene glycol butyl ether (EGBE), poly (ethylene glycol) dimethyl ether (NHD) and diethylene glycol monoethyl Ether (DGME). Then the performance of the absorbents was assessed through a series of experiments and based on the results, a comparison was made between the non-aqueous absorbents to the conventional absorbent (30% (mass) MEA aqueous solution). It was found that the organic solvent system presented a higher CO 2 removal efficiency than the MEA-H 2 O system in the first 350 s, with the maximum enhancement ranging from 5.16% to 14.36%. While NHD improved the CO 2 loading but reduced the regeneration efficiency. Except for the MEA-NHD system, all the other no-aqueous absorbents possessed a better regeneration efficiency than the MEA aqueous solution, which offers them the potential for industrial application. According to the data from NMR and FTIR analysis, after CO 2 absorption, the products in the MEA-EGBE and MEA-DGME systems were mainly found in the lower phase, the other phase was mainly organic solvents. Therefore, only the lower phase needs to be treated during desorption, with the upper phase being recycled directly, thus reducing energy consumption. The use of alcohol ether organic solvents can improve the CO 2 capture performance of absorbents to a certain extent and enhance their regeneration ability, providing a new direction for the subsequent research of non-aqueous absorbents.
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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分离科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
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IF 2.567
Tao Wang,Wei Yu,Fei Liu,Mengxiang Fang,Muhammad Farooq,Zhongyang Luo
In this study, three different nanoparticles—SiO2, TiO2, and Al2O3—were employed to enhance the CO2 gas absorption by monoethanolamine (MEA) solvent. It is observed that, with increased solids loading, the total mass-transfer enhancement has a tendency to be dominated by the bubble breaking effect. It is concluded that nanoparticles result in an increased CO2 absorption rate of >10%. On the other hand, nanoparticles exhibit much more attractive impact on CO2 desorption. Under the same desorption extent, solvent with 0.1 wt % TiO2 nanoparticles saved 42% desorption time, compared to that without nanoparticles. Under higher heat flux density, more input heat would be supplied to the heat of desorption, rather than the heat of water evaporation, which is due to the enhancement of desorption rate by nanoparticles. The issue of particle aggregation was also investigated by analyzing the size distribution of nanoparticle clusters and zeta potential of MEA solvents.
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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纳米材料学
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传热传质学
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
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2018
·Vol. 64
·期 7
·2515-2525
·
IF 3.326
Helei Liu,Moxia Li,Xiao Luo,Zhiwu Liang,Raphael Idem,Paitoon Tontiwachwuthikul
In this work, Diethanolamine (DEA) was considered as an activator to enhance the CO 2 capture performance of Monoethanolamine (MEA). The addition of DEA into MEA system was expected to improve disadvantages of MEA on regeneration heat, degradation, and corrosivity. To understand the reaction mechanism of blended MEA-DEA solvent and CO 2 , 13 C nuclear magnetic resonance (NMR) technique was used to study the ions (MEACOO - , DEACOO – , MEA, DEA, MEAH + , DEAH + , , ) speciation in the blended MEA-DEA-CO 2 -H 2 O systems with CO 2 loading range from 0 to 0.7 mol CO 2 /mol amine at the temperature of 301 K. The different ratios of MEA and DEA (MEA: DEA = 2.0:0, 1.5:0.5, 1.0:1.0, and 0:2.0) were studied to comprehensively investigate the role of DEA in the system of MEA-DEA-CO 2 -H 2 O. The results revealed that DEA performs the coordinative role at the low CO 2 loading and the competitive role at high CO 2 loading. Additionally, the mechanism was also proposed to interpret the reaction process of the blended solvent with CO 2 . © 2018 American Institute of Chemical Engineers AIChE J , 64: 2515–2525, 2018
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
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2024
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IF 3.8
Lingyu Xiao,Zhoujie Qiu,Shuo Feng,Xiaoxu Duan,Zhisheng Zhao,Yongcong Liu,Liang Ma
The global climate change problem has brought much attention to CO 2 capture technology. N-methyldiethanolamine (MDEA), as an efficient and environmentally friendly absorbent, is widely used in CO 2 capture. However, it is difficult for a single MDEA to meet the demand for efficient absorption and desorption under certain conditions, so the addition of promoters to improve its performance has become a hot research topic. The aim of this study is to deeply investigate the effects of different accelerators on the absorption and desorption of CO 2 by MDEA. Experiments were conducted to measure the absorption capacity of the MDEA compound solution for CO 2 in a bubbling reactor at 30°C and to evaluate its desorption effect in a desorption system at 90°C. The experimental results showed that increasing the promoter concentration in the MDEA-based absorbent solution significantly enhanced the absorption capacity and circulation capacity. However, in terms of desorption efficiency, the added concentrations of MEA and DEA were negatively correlated with the desorption efficiency. Notably, the addition of 0.1 mol/L DEA significantly enhanced the desorption efficiency by 16% compared with MDEA.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2025
·Vol. 12
·期 12
·342
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IF 2.7
Guangjie Chen,Guangying Chen,Li Sze Lai,Zhiwei Zhang,Xiaodi Chen,Yun Hin Taufiq-Yap
Mixed amine/sulfolane (TMS) biphasic solutions have gained attention for their adjustable structure–activity relationships and lower regeneration energy. In this study, monoethanolamine (MEA) is employed as the main absorbent and polyamine as the co-absorbent, which are subsequently mixed with the phase separation promoter sulfolane (TMS) to form ternary biphasic solvent systems. Polyamine co-absorbents include 3-Dimethylaminopropylamine (DMAPA), 3-Diethylaminopropylamine (DEAPA), and Diethylenetriamine (DETA). Phase separation, absorption, and desorption performances were systematically studied. Reaction and phase separation mechanisms were elucidated through13C nuclear magnetic resonance (NMR) spectroscopy. The overall mass transfer coefficients (KG) were measured using a wetted wall column (WWC). Variations in the amine-to-sulfolane concentration ratio showed minimal impact on phase volume, while temperature and solvent composition significantly influenced phase separation behavior. All three solvents exhibited superior CO2capture performance, with CO2loadings in the rich phases ranging from 4.09 to 4.71 mol/L and over 96.82% of CO2concentrated in them, cyclic capacities reached or exceeded 3 mol/L, and regeneration energy consumption was 29.63–55.51% lower than 5 M MEA.13C NMR analysis indicated that multiple N atoms in polyamines promoted the formation of additional ionic species during CO2absorption, thereby enhancing phase separation completeness. Furthermore, KGvalues for the ternary systems exceeded that of conventional MEA, with the MEA/DEAPA/TMS system exhibiting a 1.7-fold increase. These findings demonstrated the industrial potential of MEA/polyamine/TMS biphasic solvents for efficient CO2capture.
研究领域:
化学工程
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环境科学
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碳捕集与封存（CCS）
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分离技术
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温室气体减排
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Greenhouse Gas Control
·
2025
·
IF 5.2
Guangjie Chen,Guangying Chen,Liuyi Yin,Fei Li,Li Sze Lai,Wee Horng Tay,Swee Pin Yeap,Lin Jin
Chemical-physical biphasic absorbents significantly reduce CO 2 capture energy consumption. In this study, four tertiary amines were combined with monoethanolamine (MEA) and sulfolane to form ternary MEA/co-absorbent/sulfolane biphasic solutions for CO 2 capture. The co-absorbents used were N-methyldiethanolamine (MDEA), 1-Dimethylamino-2-propanol (DMIPA), 3-(Dimethylamino)-1,2-propanediol (DMAP), and 3-Diethylamino-1,2-propanediol (DEAP). The dynamic phase separation behavior and properties were examined, the absorption/desorption characteristics were analyzed, and the phase separation absorption mechanism was explored through 13 C Nuclear Magnetic Resonance (NMR) Spectroscopy. Results showed that all four ternary solvents performed excellently, achieving high CO 2 loadings in the upper phases (3.09–3.41 mol/L), strong absorption and desorption efficiencies (over 92.5 % and 85 %, respectively), large cyclic loadings (above 2.67 mol/L), and reduced energy consumption (>45.81 % lower compared to 5 M MEA solution). The addition of tertiary amines improved the absorption performance of MEA/sulfolane solutions. Phase separation was influenced by amine solvent alkalinity and hydrophilicity, leading to the presence of sulfolane in both liquid phases and the selective distribution of MEA and tertiary amines. This research offers promising alternatives for efficient CO 2 capture and provides theoretical guidance on liquid-liquid phase separation absorption mechanisms.
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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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Wei Zhang,Weiwen Zhang,Xinyang Li,Cheng Fu,Bin Huang,Yuxing Li,Peng Xie
In this paper, carbon dioxide (CO2) absorption by monoethanolamine (MEA) solutions in a rotating packed bed (RPB) is simulated using the computational fluid dynamics (CFD) approach. First, a new gas–liquid–solid three-phase interaction force model is developed based on the modified Kołodziej model. Then, the new interaction force model is combined with the interfacial area model, mass transfer model, chemical reaction model, and heat transfer model. Finally, a new simulation framework for RPBs based on the Eulerian multifluid approach is developed for modeling CO2 absorption in an RPB. The simulated CO2 absorption efficiency (η) and overall gas-phase volumetric mass transfer coefficient (KGa) by using the Eulerian multifluid CFD model are verified by experimental data, and the pressure drop is compared with a general pressure drop model. In addition, the pressure drop, η, and KGa are investigated considering the influences of the rotational speed, gas and liquid flow rates, and MEA concentration.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zhilin Ma,Yongda Cao,Xiujun Peng,Qiulin Yang,Chao Wang,Chang-An Zhou,Lei Song,Kui Ma,Hairong Yue
The chemical absorption method using MEA has been one of the most effective CO2 capture technologies, but the problems of low process efficiency and poor economics limit its application. In this work, the rapid phase change absorbent composed of alcohol ether solvent and potassium amino acid salt (AaK) solution was investigated, and the effects of different AaKs and ethers on the phase change behavior, phase separation mechanism, and CO2 absorption performance of the absorbent were analyzed. The results showed that when the carbon chain of the linear AaK was longer, the solubility in water was larger, and the lower liquid phase (LP) volume, phase separation time, AaK enrichment in the LP, and CO2 molar loading were larger. When the alkyl group of the branched-chain AaK was larger, the solubility in water was smaller, and the gas–liquid mass transfer, enrichment effect, and absorption rate were smaller. When the ether bonds of ether solvent were greater, the solubility of organic salts and competition for water were stronger; thus, the LP volume was smaller. Moreover, the absorption rate and CO2 loading of AaK systems were affected by the spatial structure effect of amino and carboxyl groups and the viscosity effect of solvent before absorption.
研究领域:
化学工程
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环境科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuqi Tang,Wen Xu,Shi Liu,Xuemin Yan,Lu Lai,Weichu Yu,Yuanzhu Mi,Huan Li
A clover-shaped demulsifier (M−MEA) was synthesized via a simple two-step reaction, and its chemical structure was corroborated using 1 H NMR and FT-IR. The demulsification efficacy of M−MEA was investigated on two distinct water-in-oil emulsions. The bottle test results indicated that in a W/O emulsion with 30 % oil content, M−MEA achieved a demulsification efficiency (DE) of 100 % at a concentration of 300 mg/L, temperature of 60 °C, and settling time of 120 min. Similarly, in a W/O emulsion with 70 % oil content, the DE also reached 100 % at a concentration of 500 mg/L and a settling time of 90 min. Moreover, M−MEA exhibited remarkable demulsification performance at high salinity and across a wide pH range. Comparative analysis with other commercially available demulsifiers revealed that M−MEA offered high demulsification efficiency and yielded a clearly separated water phase. The study delved into the demulsification mechanism through assessments of dynamic interfacial tension (IFT), surface tension (ST), three-phase contact angle (TCA), and zeta potential . The findings demonstrated that M−MEA, acting as an effective demulsifier, swiftly migrated to the oil–water interface, displaced the natural surfactant , and destabilized the emulsion, thereby facilitating the oil–water separation of emulsions.
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
International Journal of Environmental Research and Public Health
·
2020
·Vol. 17
·期 4
·1452
·
IF 2.849
Yankun Sun,Wanzhen Liu,Xinzhong Wang,Haiyan Yang,Jun Liu
A series of efficient adsorbents were prepared by a wet-impregnation method for CO2separation from simulated biogas. A type of commercially available silica, named as FNG-II silica (FS), was selected as supports. FS was modified with a mixture of polyethyleneimine (PEI) and ethanolamine (MEA) to improve the initial CO2adsorption capacity and thermal stability of the adsorbents. The influence of different adsorbents on CO2adsorption performance was investigated by breakthrough experiments. Scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and N2adsorption–desorption isotherm were used to characterize the silica before and after impregnating amine. Additionally, the thermal stability of adsorbents was measured by differential thermal analysis (TDA). Silica impregnated with mixtures of MEA and PEI showed increased CO2adsorption performance and high thermal stability compared with those obtained from silica impregnated solely with MEA or PEI. With a simulated biogas flow rate of 100 mL/min at 0.2 MPa and 25 °C, FS-10%MEA-10%PEI exhibited a CO2adsorption capacity of ca. 64.68 mg/g which increased by 81 % in comparison to FS-20%PEI. The thermal stability of FS-10%MEA-10%PEI was evidently higher than that of FS-20%MEA, and a further improvement of thermal stability was achieved with the increasing value of PEI/MEA weight ratio. It was showed that MEA was able to impose a synergistic effect on the dispersion of PEI in the support, reduce the CO2diffusion resistance and thus increase CO2adsorption performance. Additionally, if the total percentage of amine was the same, FS impregnated by different ratios of PEI to MEA did not exhibit an obvious difference in CO2adsorption performance. FS-15%PEI-5%MEA could be regenerated under mild conditions without obvious loss of CO2adsorption activity.Keywords:silica;solid amine;biogas
研究领域:
化学工程
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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
危险品化学品经营许可证（带存储）