Journal of Water Process Engineering
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2025
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IF 6.7
Yuansheng Tang,Wentian Zheng,Guangxing Yang,Wei Bi,Fengmi Zeng,Lu Xiao,Xianhui Li
Membrane contactors as an emerging separation technology exhibit great potential for ammonia recovery due to the thermal and chemical stability. However, membrane wetting remains a significant challenge, hindering its broader industrial application. This study explores the effects of membrane wetting on the ammonia absorption rates through membrane contactor under varying operation conditions. The wetting depth was in-situ monitored by the ultrasonic technique. Results reveal that reducing the feed flow rate and lowering the absorbent concentration can effectively mitigate the decline in ammonia absorption rates, while increasing the feed pH does not affect the membrane wetting process but enhances the ammonia recovery. Furthermore, the rare-earth wastewater proves suitable for treatment via membrane contactor as it requires no additional low-surface-tension surfactant and has a higher ammonia concentration. Moreover, a developed model is conducted to elucidate the transport mechanism of ammonia through membrane contactor during wetting process. With the increased wetting depth during membrane contactor process, the boundary layer thickness gradually increased, significantly strengthening the transfer resistance. This study provides an insight into further understanding the ammonia mass transfer through membrane contactor under wetting conditions.
研究领域:
环境工程
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化学工程
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高影响因子
Greenhouse Gases-Science and Technology
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2024
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IF 2.7
Yu Bin Wang,Jie Rui Yu,Xiao Xian Zhang,Hao Chen,Han Bang Ruan,Guo Hua Yang
Ammonia carbon capture is characterized by low corrosion, resistance to oxidation and degradation, and low energy consumption for regeneration. However, it also presents challenges such as a slow absorption rate and notable ammonia escape. Current ammonia decarbonization research primarily focuses on the flue gas from power plants, which differs in composition from ship exhaust gas. To address this, we constructed a small carbon absorption test bench and used a mixture of CO 2 and N 2 as the ship exhaust gas. Ammonia solution and alcohol served as absorbents and additives, respectively, to explore the effects of the additive hydroxyl number, the concentrations of the additive and ammonia solution, and the reaction temperature on carbon loading, absorption rate, and ammonia escape. Results indicated that n-propanol was most effective in inhibiting ammonia escape, and a low concentration of ammonia solution was more suitable for absorbing CO 2 . Specifically, when the concentration of ammonia was 4% and the concentration of n-propanol was 0.2 mol/L, the cumulative ammonia escape was reduced by 34% compared to the scenario without additives. Additionally, the carbon loading and average absorption rate reached 0.49 mol CO 2 /mol NH 3 and 2.33 × 10 −3 mol·kg −1 ·min −1 , respectively, representing increases of 34.2 and 60.7%. However, as the reaction temperature increased, the effectiveness of n-propanol in enhancing ammonia absorption diminished. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.
研究领域:
化学工程
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环境科学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Sen Liu,Hao Ling,Juan Lv,Hongxia Gao,Yanqing Na,Zhiwu Liang
The sulfolane was, surprisingly, found to be a universal phase-splitting solvent in a serial of aqueous primary alkanolamine solution for CO2 removal; the reaction product of carbamate and hydrophilicity of amine can be the key factor for triggering phase change; also, the phase change can have a significant effect on CO2 capture performance. To comprehensively understand the effect of phase change on absorption, stripping, and phase separation performance, MEA sulfolane-based solution was chosen as a typical biphasic system for investigation. First, the experimental results revealed that the phase change can dramatically decrease the absorption rate and lead to less CO2 capacity in absorption processes. Second, the enriched MEA in separated solution can substantially decrease the energy consumption for CO2 stripping but exorbitant concentration of MEA can significantly reduce the CO2 removal efficiency in a quasicycle of absorption and desorption processes. Third, the phase separation rate of emulsion of MEA/sulfolane solution can be obviously improved by the increasing temperature, and fortunately, the increasing temperature had less effect on miscible solubility of MEA and sulfolane in two separated phases. Finally, on consideration of the absorption rate, energy consumption, and phase separation rate, a new technological process was proposed for CO2 capture using primary alkanolamine sulfolane-based solution to achieve the goal of relative high CO2 removal efficiency and energy saving.
研究领域:
化学工程
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环境科学
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高影响因子
Drug Testing and Analysis
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2022
·Vol. 15
·期 10
·1099-1106
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IF 3.234
Shulei Han,Chuan Liu,Huan Chen,Ya'ning Fu,Yuan Zhang,Ruijuan Miao,Peipei Ren,Pengpeng Yu,Zhihao Shi,Yushan Tian,Hongjuan Wang,Tong Liu,Hongwei Hou,Qingyuan Hu
Nicotine lactate, nicotine tartrate, nicotine benzoate, and freebase nicotine (FBN) are four forms of nicotine salt systems that are present in tobacco products. However, few in vivo studies have compared their pharmacological (pK) efficacies, which are important for understanding their roles in the addiction and abuse of tobacco and nicotine products. In this work, the pK of the above nicotine salt systems was studied by subcutaneously injecting their aqueous solutions in rats and obtaining blood samples from the jugular vein. Nicotine levels in the blood were analyzed by LC–MS/MS. The results demonstrated that rapid nicotine absorption occurred in all nicotine systems. Of them, NB had the smallest T max , while FBN had the largest T max . The nicotine metabolic rate and clearance decreased for FBN, indicating that nicotine retention in the body was higher than for the other three salt-based systems. Compared with nicotine salts, FBN could reach and maintain a higher concentration in the animal model. Additionally, as the benzoic acid ratios increased, the C max of the nicotine benzoate (NB) in the plasma decreased. This indicates that the lower the pH, the lower the C max . When different concentrations of NB were used, the higher the NB concentration, the greater the C max and AUC (0-t) . These results demonstrate that nicotine adsorption by NB in the animal model depended on both pH and concentration. This baseline information could be used to explain different clinical pharmacological observations in humans, though this study only considered the effects of nicotine on pharmacokinetics in vivo.
研究领域:
毒理学
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药理学
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DOI
PubMed
高影响因子
Chemical Engineering and Processing-Process Intensification
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2020
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IF 3.731
Haryo Wibowo,Wenjuan Liao,Xuanyou Zhou,Caimeng Yu,Dicka Ar Rahim,Dwi Hantoko,Huan Qun,Mi Yan
In this study, the effect of absorption pressure and temperature towards the CO 2 absorption capacity and rate of choline chloride - monoethanol amine deep eutectic solvent (ChCl-MEA DES) was evaluated. Water mixing into ChCl-MEA DES was also examined as a method to improve CO 2 absorption behavior. Equilibrium experiments were done in a batch reactor and the data was analyzed using response surface methodology (RSM). Results suggested that the dominant mode of CO 2 absorption by ChCl-MEA DES was physical absorption. The maximum capacity of CO 2 absorption obtained in this study was 0.379 mol-CO 2 /mol-DES from absorption at (10 bar, 40 °C) using DES with 50 %v water. Water mixing up to 50 %v was found to nearly double the CO 2 absorption capacity of ChCl-MEA DES compared to neat DES. Study into CO 2 absorption rate by ChCl-MEA DES found that it is mainly influenced positively by pressure and water content, while not significantly influenced by temperature. CO 2 absorption rate of ChCl-MEA DES with 50 %v water was found to be on average twice of that of neat DES. It was also found that water content up to 50 %v does not change the mechanism of CO 2 absorption by ChCl-MEA DES.
研究领域:
化学工程
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环境科学
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2018
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IF 6.653
Lidong Wang,Yifeng Zhang,Rujie Wang,Qiangwei Li,Shihan Zhang,Meng Li,Jie Liu,Bo Chen
A novel phase splitter, namely, sulfolane, was proposed to advance the traditional monoethanolamine (MEA) absorption technology for CO2 capture by simultaneously promoting the absorption rate and lowering heat duty. The phase-splitting phenomenon was observed after the CO2 loading level had exceeded 0.73 mol CO2/L, thereby generating a CO2-rich MEA upper layer and a lower layer containing sulfolane. Sulfolane facilitated CO2 absorption because of its strong affinity with acid gases, which resulted in an absorption rate 2.7 times higher than that of the conventional MEA process. The process simulation using Aspen Plus indicated that the regeneration heat with the MEA/sulfolane mixture as a solvent substantially decreased to 2.67 GJ/t-CO2, which was 31% lower than that of the conventional MEA process (3.85 GJ/t-CO2). Moreover, the sensible heat and vaporization heat of MEA/sulfolane were markedly decreased by 62.4% and 47.9%, which could be ascribed to the decreased stripping volume and relatively high CO2 partial pressure caused by liquid–liquid phase separation. The proposed system is proved to be a promising candidate for the advancement of CO2 capture techniques with high CO2 absorption capacity, rapid absorption rate, and low-energy penalty.
研究领域:
化学工程
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环境科学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Qing Sun,Lifang Zhang,Fengjun Ming,Jiawei Fang,Weidong Zhang
Amine-based chemical absorption for CO 2 capture gains superiorities in removal efficiency, CO 2 capacity and selectivity, but suffering from high energy consumption. Improvements on absorption – desorption performances could effectively tackle the regeneration energy and capital cost challenge. Recently, a new method of mass transfer promoters (MTPs) based on density-triggered interfacial turbulence has been proposed and confirmed to increase mass transfer rate by several fold. Guided by density difference principle, in this work, means of adjusting amine type, concentration and MTPs were investigated to regulate the absorption − desorption rate. Increasing amino group of amine molecule, amine concentration and MTPs concentration were found to enhance absorption rate by 5–7 fold resulted from the strengthening of density difference. The visualized experiments revealed the transition and reinforcement of interfacial turbulence driven by intensified density difference. Further the power function relationship between enhancement factor and parameters related with density driven Rayleigh-Bénard effect was established, providing guidance of predicting enhancement extent. The effects of MTPs on desorption performance were assessed in terms of desorption rate and cyclic CO 2 loading. Absorbents with MTPs possessed higher desorption rate and cyclic CO 2 loading with largest enhancement of 154 % and 159 % respectively, showing great potential for cost-effective CO 2 capture.
研究领域:
化学工程
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环境科学
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高影响因子
ENERGY & FUELS
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2013
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IF 2.853
Shufeng Shen,Xiaoxia Feng,Shaofeng Ren
Preliminary screening experiments of carbon dioxide (CO2) absorption into aqueous 35 wt % equivalent potassium carbonate (K2CO3) solution with different additives were performed in a wetted-wall column at 322 K. Arginine was found as an effective promoter to enhance the absorption rate in aqueous K2CO3 solution. The effect of arginine concentration and CO2 loading on the absorption rate into carbonate solutions is discussed. The vapor–liquid equilibrium of 35 wt % equivalent K2CO3 with 0–5 wt % arginine was obtained in the temperature range from 323 to 343 K using inert-gas stripping method. Desorption curves of the unpromoted and arginine-promoted carbonate solutions are also discussed.
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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气体吸收
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热力学
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DOI
高影响因子
International Journal of Greenhouse Gas Control
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2018
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IF 4.078
Yanru Chen,Wusan Jiang,Xiao Luo,Yangqiang Huang,Bo Jin,Hongxia Gao,Wensheng Li,Zhiwu Liang
In this work, the stopped-flow technique is used to determine the kinetics data in terms of pseudo first-order rate constants ( k 0 ) for the homogenous reaction of CO 2 into aqueous solutions of 3-dimethylaminopropylamine (DMAPA) and 3-diethylaminopropylamine (DEAPA) as amine concentrations ranged from 0.05 kmol/m 3 to 0.15 kmol/m 3 and temperature ranged from 293 K to 313 K. It is found that k 0 increased with increasing temperature and with increasing amine concentration. The mechanism of the pseudo first-order chemical reaction hypothesis is applied to interpret the experimental data. The Arrhenius expressions as k 2 = 8.69 × 10 9 × exp ( − 4226.2 / T ) for DMAPA and k 2 = 7.21 × 10 12 × exp ( − 6162.9 / T ) for DEAPA are obtained. The results show that the experimental CO 2 absorption rates exhibited good agreement with predicted CO 2 absorption rates with an average relative deviation (ARD) of 2.34% and 7.53%, respectively. Finally, the interaction of tertiary amine groups with primary amine groups and the effect of molecular structure on the interaction are discussed by comparing the CO 2 absorption and desorption performances in five different systems (MEA, DEEA, MEA + DEEA, DMAPA, DEAPA). It is found that the intermolecular interaction of amino groups is stronger than that of intramolecular interaction.
研究领域:
化学工程
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环境科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Yifu Li,Li'ao Wang,Zhongchao Tan,Zhien Zhang,Xinyue Hu
Absorption and desorption of CO 2 using K 2 CO 3 solutions promoted by three amino acid salts (AASs), potassium glycinate (PG), potassium lysinate (PL) and potassium L-argininate (PA), were evaluated using 40% CO 2 at 40 °C and with pure N 2 at 80 °C, respectively. The addition of all 3 AASs clearly enhanced both absorption and desorption of CO 2 compared to single K 2 CO 3 solution. PA + K 2 CO 3 solution showed the highest CO 2 cyclic capacity of 0.678 mol CO 2 /mol absorbent, while the highest CO 2 absorption and desorption rates of 39.8 and 17.6 mol CO 2 L −1 s −1 were achieved by PG + K 2 CO 3 solution. Finally, simulated biogas containing 40% of CO 2 and 60% of CH 4 was used as test gas in a hollow fiber membrane contactor. PG and PA promoters presented higher CO 2 absorption flux and removal efficiency than PL promoters in K 2 CO 3 solution within low Gas/Liquid ratio region. Stable CO 2 removal performances for all three promoters were observed at elevated temperature and pressure for 60 min operation.
研究领域:
化学工程
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环境科学
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高影响因子
ENERGY
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2018
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IF 4.968
Zeyang Wu,Sen Liu,Hongxia Gao,Qiqi Yin,Zhiwu Liang
The structure-activity relationship of eleven diamines and MEA was investigated in order to provide guidance for the selection of the potential CO 2 capture absorbent. The effects of methyl, ethyl, hydroxyl groups, and distance between N groups in molecular structures were evaluated experimentally by using the rapid fast screening method and computed by Gaussian 09. Experimental results revealed that the proper number of methyl groups and ethyl groups on N atom could improve the absorption rate as well as the cyclic CO 2 capacity, and the addition of a hydroxyl group actually achieved a lower energy requirement (i.e. cyclic CO 2 capacity) for solvent regeneration with the decreasing stability of carbamate. In addition, the diamine with a hydroxyl group is more favorable for good stability in regeneration process, which addresses the problem of solvent loss in the application of diamines. Chain length extension from C 2 to C 3 can result in the poorer stability of the carbamate and lower energy requirement for amine regeneration. Thus, the lowest energy consumption (i.e. CO 2 cyclic capacity) was then achieved by aqueous 2-((2-aminoethyl)amino)ethanol (AEEA) solution, presenting it can be considered as an alternative or a potential absorbent for post-combustion CO 2 capture. Furthermore, the relative free energies of the tested diamines were computed by the Gaussian software for validating the stability of the carbamate formation , the order of which is in accordance with the order of the cyclic CO 2 capacity for all tested amines, indicating the experimental conclusion can be reliable.
研究领域:
化学工程
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环境科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Hangzhi Wu,Shuyue Wen,Xiaomin Zhang,Shule Zhang,Xuefeng Guo,Youting Wu
Sterically hindered amines (SHAs), such as 2-amino-2-methyl-1-propanol (AMP), are an important subclass of conventional absorbents with large CO 2 capacity, while ionic liquids (ILs) are novel materials with unique physiochemical properties including negligible vapor pressure and high thermal stability. To combine the characteristics of these two kinds of CO 2 absorbents together, we proposed and successfully synthesized a series of new sterically hindered amino acid ionic liquids (SHAAILs). These SHAAILs (aqueous solutions) were proved to have excellent physiochemical properties, large CO 2 capacity (up to 0.92 mol mol −1 at 313.2 K, 1.0 bar), and fast absorption rate (greater than AMP). Dynamic absorption and thermal regeneration experiments were done to further illustrate the capability of SHAAILs in absorbing and desorbing CO 2 , and [N 1111 ][β-iPrNH-Ala] was found to be an excellent CO 2 absorbent owing to its suitable steric hinderance and also its ionic nature. NMR analysis confirms that the SHAAILs of suitable steric hinderance undergo the carbamate-mediated rapid hydrolysis mechanism in absorbing CO 2 . Due to the comprehensive advantages of SHAAILs, they are believed to have great potentials as efficient CO 2 absorbents in practical applications.
研究领域:
化学工程
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环境科学
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高影响因子
危险品化学品经营许可证（带存储）