CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuai Wang,Guangyi Cui,Yue Gu,Zhixuan Ma,Jing Wang,Shufeng Shen
Water-lean liquid–liquid biphasic absorbents have recently received increasing attention due to the potential advantages for capturing low CO 2 concentration flue gas with high efficiency in capture rate and energetic aspects. However, performance assessment has rarely been performed in a lab-scale continuous and integrated capture plant. In this work, a water-lean biphasic system containing 2-(methylamino) ethanol (M), diglyme (D) and water (H) was proposed for about 5 vol% CO 2 exhaust gas treatment based on the batch absorption–desorption capture tests. Integrated phase changing capture process using the developed absorbent formulation 40 M−50D−10H (WLS-10C) was demonstrated in a lab-scale CO 2 capture plant over 200 hrs testing. Energetic and capture performance as well as operational stability were evaluated and compared with aqueous 30 mass % MEA under the same targeted capture rate (about 90 %). The stable phase change behavior after CO 2 absorption was observed in the phase separator, and the CO 2 rich phase can be effectively regenerated at 393 K, forming a monophasic solution in the feed tank with the CO 2 lean phase from the separator for solvent reuse. This biphasic WLS-10C can reduce the energy consumption by about 45–55 % compared with aqueous MEA at about 90 % capture rate, demonstrating a pronounced energy-saving effect. Moreover, volumetric mass transfer coefficient and viscosity were also discussed. These findings provide valuable insights into the further pilot demonstration of the proposed biphasic absorbent.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 5
·3146-3157
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IF 3.9
Yanlong Hu,Qiang Wang,Dingkai Hu,Yingshuang Zhang,Muhammad Furqan,Shijian Lu
Monoethanolamines (MEAs) are widely used for CO2 capture, but their regeneration energy consumption is very high. CO2 Phase change absorbents (CPCAs) can be converted into CO2-rich and CO2-lean phases after absorbing CO2, and the regeneration energy consumption can be reduced because only the CO2-rich phase is thermally desorbed. In this paper, a novel CPCA with the composition “MEA/n-butanol/H2O (MNBH)” is proposed. Compared with the reported MEA phase change absorbent, the MNBH absorbent has higher CO2 absorption capacity, smaller absorbent viscosity and CO2-rich phase volume. The MNBH absorbent has the highest CO2 absorption capacity of 2.5227 mol CO2 per mol amine at a mass ratio of 3 : 4 : 3. The CO2 desorption efficiency reaches 89.96% at 120 °C, and the CO2 regeneration energy consumption is 2.6 GJ tCO2−1, which is about 35% lower than that of the 30 wt% MEA absorbent. When the mass ratio of MNBH absorbent was 3 : 6 : 1, the CO2 recycling capacity was 4.1918 mol CO2 L−1, which is 76% higher than that of the conventional 30 wt% MEA absorbent. The phase change absorbent developed in this paper can reduce the desorbent volume by about 50% and has good absorption performance for CO2 in flue gas.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2024
·
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
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2024
·
IF 10.4
Wei Wei,Donghui Li,Xiaoxuan Yan,Xujia Mu,Zhiyi Li,Zhijun Liu
In recent years, research into biphasic solvents has become an important direction more efficient control of CO 2 emissions. However, most biphasic absorbents still face challenges such as low cyclic capacity and high viscosity of the rich phase. To develop a novel solvent with enhanced cyclic capacity and reduced regeneration energy consumption, a biphasic solvent consisting of DETA/Isobutanol/H 2 O was proposed. The results demonstrate excellent absorption and desorption performance of the DETA/Isobutanol/H 2 O biphasic solvent, with an absorption capacity ranging from 1.13 to 1.35 mol/mol and a cyclic capacity ranging from 0.61 to 0.84 mol/mol. After conducting 5 times absorption-desorption experiments, the cyclic capacity of DETA/Isobutanol/H 2 O biphasic solvent remained at 0.8 mol/mol. The estimated energy consumption for regeneration, under lean phase load, was calculated to be 2.42 GJ/t CO 2 , which was 42.24 % lower than that of 30wt% MEA aqueous solution (4.19 GJ/t CO 2 ). The DETA/Isobutanol/H 2 O solution exhibits promising potential in terms of absorption-desorption performance and regenerative energy consumption, making it an exceptional CO 2 absorbent.
研究领域:
环境科学
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化学工程
·
碳捕集与封存
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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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
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ying Xie,Zhixiang Xia,Chao Li,Man Mou,Ximing Hu,Wei Chen,Xiaoming Xu,Yang Xia,Zihao Liu,Mengxiang Fang
The steel industry contributes approximately 7–9 % of global anthropogenic CO 2 emissions. Chemical absorption is a promising strategy for reducing steel industry carbon emissions. MAA, a novel amine blend primarily composed of methyldiethanolamine (MDEA) and 2-(Piperazin-1-yl) ethanamine (AEP), exhibits potential but lacks industrial-scale validation. Focusing on the blast furnace (BF)-basic oxygen furnace steelmaking process, this study conducted pilot tests with MAA and 30 wt% MEA for BF gas (20 vol% CO 2 ) and top gas recycling-oxygen blast furnace (TGR-OBF) gas (35 vol% CO 2 ) and studied process modifications. The results showed that after 200 h of stable operation, MAA achieved optimal CO 2 capture from BF gas at a liquid-to-gas ratio of 8 L/Nm 3 , with a regeneration energy of 2.47 GJ/t CO 2 , compared to 3.78 GJ/t CO 2 for 30 wt% MEA. MAA achieved a regeneration energy of 1.81 GJ/t CO 2 for TGR-OBF gas, 26.72 % lower than that for BF gas. Absorber intercooling reduced regeneration energy by 8.86 %. Among the process modifications, directing 10 % of the rich solution to a flash evaporator for semi-lean solution recycling back to the middle of the absorber, with the remaining 90 % undergoing thermal regeneration in the stripper, demonstrated the lowest regeneration energy for TGR-OBF. This modification reduced MAA regeneration energy by 5.52 %. Additionally, two-stage water scrubbing effectively controlled amine emissions from the 10 Nm 3 /h pilot plant, reducing MAA emissions to 17.83 mg/Nm 3 after the second stage. MAA exhibited excellent adaptability to BF and TGR-OBF gases, achieving 90 % CO 2 removal efficiency with a minimum regeneration energy of 1.71 GJ/t CO 2 . The findings highlight the potential for the large-scale application of MAA in the steel industry to significantly reduce CO 2 emissions.
研究领域:
钢铁工业
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Yaxuan Zhen,Chunying Zhu,Taotao Fu,Youguang Ma
Blended organic amine solutions are considered an effective strategy for developing highly efficient and low energy-consuming absorbents due to the possibility of combining the advantages of single amine. The 2-amino-2-methyl-1-propanol (AMP) and 2-(ethylamino)ethanol (EAE) amine blends were prepared in three molar ratios: blend-1 ( n AMP : n EAE = 3:1), blend-2 ( n AMP : n EAE = 1:1), and blend-3 ( n AMP : n EAE = 1:3). The impacts of gas-liquid flow rate, amine concentration, molar ratio, temperature, and CO 2 concentration on absorption performance were investigated using the serpentine microchannel. Additionally, the effects of amine concentration and molar ratio on the desorption performance of saturated solutions were also explored. The performance of amine blends in absorption and desorption was evaluated by measuring absorption rate, efficiency, and loading, as well as desorption efficiency, energy consumption, cycle capacity, and average desorption rate. The desorption results were compared to those of the benchmark solvent, 30 wt% MEA, under identical operating conditions. The results indicate that the 25 wt% blend-2 solution performs exceptionally well, exhibiting a 15 % increase in absorption efficiency compared to the AMP aqueous solution at a gas-liquid ratio of 20. Additionally, the cycle capacity and average desorption rate are 1.7 times higher than those of the 30 wt% MEA solution. Notably, the energy consumption of the 25 wt% blend-2 solution for desorption is only 60 % of the 30 wt% MEA solution.
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
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
Frontiers in Chemistry
·
2020
·
IF 3.693
Lai Nanjun,Zhu Qingru,Qiao Dongyu,Chen Ke,Tang Lei,Wang Dongdong,He Wei,Chen Yuemei,Yu Tong
To improve CO2 adsorption performance of nanoparticle absorbents, a novel tertiary amine functionalized nano–SiO2 (NS–NR2) was synthesized based on the 3–aminopropyltrimethoxysilane (KH540) modified nano–SiO2 (NS–NH2) via methylation. The chemical structure and performances of the NS–NR2 were characterized through a series of experiments, which revealed that NS–NR2 can react with CO2 in water and nanofluid with low viscosity revealed better CO2 capture. The CO2 capture mechanism of NS–NR2 was studied by kinetic models. From the correlation coefficient, the pseudo second order model was found to fit well with the experiment data. The influencing factors were investigated, including temperature, dispersants, and cycling numbers. Results has shown the additional surfactant to greatly promote the CO2 adsorption performance of NS–NR2 because of the better dispersity of nanoparticles. This work proved that NS–NR2 yields low viscosity, high capacity for CO2 capture, and good regenerability in water. NS–NR2 with high CO2 capture will play a role in storing CO2 to enhanced oil recovery in CO2 flooding.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED ENERGY
·
2021
·
IF 9.746
Yunlei Zhao,Bo Jin,Xiao Luo,Zhiwu Liang
Many works have focused on the reactivity and valence transition of Fe-based oxygen carriers in chemical looping partial oxidation reforming process. However, the reforming performance and impacts of operating factors are unclear with the co-feeding of CaO being CO 2 carrier to realize simultaneous CO 2 capture and utilization. In this work, thermodynamic equilibrium calculation, reactivity test and material characterization are carried out to optimize the process characteristics. The impacts of feeding conditions (Fe/Al weight ratio, methane amount, Ca/Fe mole ratio and packing manner) on the reforming reactivity are obtained to reveal the interaction between CaO and Fe 2 O 3 . The gas product distribution indicates that the carbon deposition and oxidation degree is closely related to CH 4 amount. The spatial configuration between CaCO 3 and Fe 2 O 3 reforming is essential to obtain the desirable reforming products. The difference of FeO existence on the theoretical and experimental phase components illustrates that reaction degree is affected by the reduction agent amount. By comparing the methane temperature-programmed reaction of CaCO 3 , Fe 2 O 3 and their mixture, it is suggested that the existence of CaCO 3 is beneficial for accelerating iron-based methane reforming. This study provides a way to improve reaction degree and optimize process characteristic for chemical looping reforming process.
研究领域:
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaole Dong,Shihui Wang,Bingqi Tan,Xiangyi Geng,Futang Liu,Penghao Gao,Peiling Gao,Jiutao An,Xinpeng Liu,Qingmei Meng
Different nanoparticles were introduced into the N-ethylethanolamine/diethylaminoethanol/p-Xylene biphasic absorbent to form nanofluid systems, and the CO 2 capture performance was investigated. The CO 2 capture performance of the absorbent was significantly enhanced by introducing 0.1 wt% CuO nanoparticles, with a first absorption carbon capacity of 0.09952 g CO 2 ·g −1 absorbent. In the first cycle of regeneration, [email protected] % CuO nanofluid had a carbon capacity of 0.07654 g CO 2 ·g −1 absorbent, achieving an efficiency improvement of 35.73 %. Its regeneration energy consumption was reduced by 0.3256 GJ·t -1 CO 2 , representing a 15 % decrease compared with the base liquid. The cyclic absorption capacity was enhanced significantly after the addition of CuO, with a CO 2 capacity at 0.0690 g CO 2 ·g -1 absorbent after four cycles. The characterization of CuO revealed the stability of nanoparticles in nanofluids. In addition, it was found that the nanoparticles exhibited phase-transfer characteristics. After absorption, they accumulated in the rich phase and then became uniformly distributed throughout the entire liquid phase following regeneration. This behaviour could promote a more efficient desorption process. This study provides a new approach for green chemistry and carbon capture applications.
研究领域:
纳米技术
·
化学工程
·
环境科学
·
绿色化学
·
碳捕集与封存
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qiang Zheng,Zhenguo Liang,Derui Li,Fuxin Yang,Houzhang Tan,Xiaopo Wang
Deep eutectic solvent (DES) has the potential to replace aqueous amines for carbon capture. However, the reported DESs fail to absorb CO 2 equivalent to that absorbed by aqueous amines. To combine the excellent performance of amines and DESs, 9 amine-based DESs were prepared. The tetraethylammonium chloride was selected as the hydrogen bond acceptor, while ethanolamine, diethanol amine and triethanolamine were selected as the hydrogen bond donors. The molar ratios range from 1:4 to 1:6. Their properties were analyzed, including the structure, the thermal behavior and the potential corrosion. It has been determined that all DESs show a large liquid range (200 ∼ 600 K). Furthermore, the absorption characteristics of 9 DESs were studied. It has been found that the absorption capacity of DES3 and DES5 can reach up to 0.4066 and 0.3752 mol CO 2 /mol absorbent respectively, even 3 ∼ 6 times amount compared with the corresponding aqueous amines. At the laboratory level, the heat duty for the desorption process at 413.15 K of DES1 is 21.31 % of that for that of 30 wt% MEA at 393.15 K. For DES5, this value is 6.70 %. Besides, these DESs can maintain their splendid performance in absorption–desorption after 5 cycles. Meanwhile, the thermal stability and viscosity of the rich-absorbents were analyzed. Rich-absorbents are stable. Furthermore, effects of water have been inspected. The added water reduces the viscosity but confines the absorption capacity. For balance, the addition of 10 wt% water is recommended. Finally, the absorption mechanism was revealed. Both the physical and chemical absorption promote the absorption capacity of DESs.
研究领域:
化学工程
·
环境科学
·
材料科学
·
物理化学
✓ 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）