Processes
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2024
·Vol. 12
·期 8
·1768
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IF 2.8
Jinxu Zhang,Bo Ling,Yong He,Yanqun Zhu,Zhihua Wang
Hydrogen energy, as a clean, renewable, and high-calorific energy carrier, has garnered significant attention globally. Among various hydrogen production methods, the thermochemical iodine–sulfur (I-S) cycle is considered the most promising due to its high efficiency and adaptability for large-scale industrial applications. This study focuses on the distillation characteristics of the HIx(HI–I2–H2O) solution within the I-S cycle, which is crucial for achieving the high-concentration HI necessary for efficient hydrogen production. Previous methods, including phosphoric acid extraction–distillation and reactive distillation, have addressed azeotrope issues but introduced complexities and equipment demands. This research constructs a hypo-azeotropic HIxsolution distillation experimental system and uses the Aspen Plus v14 software to optimize distillation parameters. By analyzing the effects of feed stage, reflux ratio, and feed temperature, the study provides essential data for improving distillation efficiency and supports the scale-up of I-S cycle technology. The findings indicate that optimal distillation is achieved with a feed position at 1/3 column height, a reflux ratio of 1.4, and a feed temperature near the boiling point, enhancing the feasibility of industrial hydrogen production via the I-S cycle.
研究领域:
化学工程
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Shenfeng Yuan,Genlai Bao,Hong Yin,Zhirong Chen
In this article, Aspen Plus was used to simulate a process for separating the mixture of decanol + undecanol + tetradecane + pentadecane to obtain decanol + undecanol product and tetradecane + pentadecane product. Aqueous ethanol solution and octadecane were chosen as potential extractants. First, the liquid–liquid equilibrium (LLE) data of the four quaternary systems {ethanol (1) + decanol (2) + tetradecane (4) + water (6), and ethanol (1) + decanol (2) + pentadecane (5) + water (6), ethanol (1) + undecanol (3) + tetradecane (4) + water (6), ethanol (1) + undecanol (3) + pentadecane (5) + water (6)} and the six-component system {ethanol (1) + decanol (2) + undecanol (3) + tetradecane (4) + pentadecane (5) + water (6)} were obtained at 293.15, 298.15, and 303.15 K under atmospheric pressure. The UNIQUAC model was used to regress the LLE data of the four quaternary systems to obtain the binary interaction parameters, which were used to predict the LLE data of the six-component system. The results showed that the predicted and experimental data were in great agreement. Second, the LLE data of the seven-component system {ethanol (1) + decanol (2) + undecanol (3) + tetradecane (4) + pentadecane (5) + water (6) + octadecane (7)} were obtained at 303.15, 308.15, and 313.15 K under atmospheric pressure, and the binary interaction parameters involving the component octadecane were obtained by data regression using the UNIQUAC model. Finally, a 2500t/a process of separating the mixture of decanol + undecanol + tetradecane + pentadecane was simulated in Aspen Plus with these regressed binary interaction parameters. On optimization, 99.80 wt % decanol + undecanol product and 99.76 wt % tetradecane + pentadecane product were obtained.
研究领域:
化学工程
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工艺模拟
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
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IF 3.269
Guangyuan Chen,Yunhai Shi,Rongchun Shen,Wei Li,Jinghong Zhou
Two kinds of ketones , 5-methyl-2-hexanone and di-isobutyl ketone were selected as the extraction agents for separating the azeotrope of ethylene glycol (EG)and 1,2-butanediol (1,2-BDO). By comparing the results of preliminary extraction experiments under 303.15 K and normal pressure, 5-methyl-2-hexanone was the better one. And the Liquid-liquid equilibrium data of EG + 1,2-BDO + 5-methyl-2-hexanone ternary system were successively measured at 293.15 K and 313.15 K. The distribution coefficient ( K 2 ) and selectivity coefficient ( S ) of 1,2-BDO were calculated from the experimental data. The LLE data were correlated by NRTL and UNIQUAC activity models with the authorized Aspen Plus software. The root mean square deviations ( RD ) between the experimental and calculated values were all less than 0.7%, which means they were consistent with each other very well.
研究领域:
化学工程
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分离技术
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DOI
高影响因子
ENERGY & FUELS
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2024
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IF 5.2
Jia-tao Xiang,Jun-ting Li,Xiong Zhang,Han Zhang,Shao-hui Ren,Shi-hong Zhang
This study focused on the development of a novel process of H2O2/FeSO4 preoxidation combined with wet flue gas desulfurization (WFGD) postabsorption for simultaneous desulfurization and denitrification, and recovery of sulfur and nitrogen from flue gas. The results show that when no oxidant is added, the denitrification efficiency by WFGD is only 5.3%, while under the H2O2/FeSO4 preoxidation, the desulfurization and denitrification efficiency can reach 99.9% and 83.6%, respectively. When the liquid/gas ratio reaches 18 L·m–3, the desulfurization efficiency is nearly 100%, and the denitrification efficiency can reach 90.6% due to the increased liquid/gas contact area and improved heat and mass transfer. The absorption process of SO2 and NOx involves both physical and chemical absorption, which is dominated by physical absorption, and the absorption characteristics are multilayer absorption. The desulfurization products CaSO3 and CaSO4, and the denitrification products Ca(NO2)2 and Ca(NO3)2, are absorbed by the CaCO3 slurry. The Aspen Plus process simulation results show that the desulfurization and denitrification efficiencies are 99.5% and 89.6%, respectively, and the concentrations of SO2 and NOx in the flue gas are 21.4 mg·m–3 and 41.5 mg·m–3, respectively, which meet the ultralow emission standards. In addition, the H2O2/NO molar ratio, oxidation temperature, and SO2 concentration have an important effect on the NO conversion, which then affects the denitrification efficiency.
研究领域:
环境工程
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化学工程
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过程模拟
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DOI
高影响因子
Geoenergy Science and Engineering
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2025
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IF 4.6
Muhammad Arqam Khan,Shaine Mohammadali Lalji,Moiz Ali Khan Sial,Areeba Batool,Mohsin Ayubi,Syed Imran Ali,Muhammad Mustafa,Mei-Chun Li
The increasing demand for sustainable carbon capture technologies necessitates the exploration of novel solvents for CO 2 absorption. Carbon Capture and Storage (CCS) is a critical technology for controlling greenhouse gas emissions and tackling climate change. This study investigated the efficiency of sodium alginate (Na-Alg) as a bio-based solvent in carbon capture technology using the simulation software, Aspen Plus. The model was developed to simulate the absorption of CO 2 in a tray column, and the performance of sodium alginate solution was analyzed using various key parameters, including temperature, pressure, and solvent flow rate, to maximize the carbon capture efficiency. The simulation was then validated with the help of existing literature and experimental data and was found to be in good correlation. The carbon capture efficiency of CO 2 was observed at 97 % using sodium alginate solution. The relations between process parameters and their influence on CO 2 capture were evaluated by applying response surface methodology, identifying optimal conditions at 10–20 °C, 10 bar pressure, and a solvent flow rate of 20–25 kmol/h. These findings highlight the potential of sodium alginate as an effective, eco-friendly solvent for CCS, offering both environmental and operational advantages. The study also demonstrates the utility of simulation and optimization techniques in enhancing CCS performance.
研究领域:
化学工程
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环境工程
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能源技术
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过程模拟
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Jiqing Rao,Xin Tian,Yuze Sun,Honghai Wang,Rui Wang,Chunli Li,Jiapeng Liu
2-methyltetrahydrofuran (2-MeTHF) and acetonitrile (ACN) are widely used as solvents in the pharmaceutical industry. As 2-MeTHF and ACN form azeotrope that cannot be separated via regular distillation. Therefore, in this study, the molecular mechanism, experiment-based extractant screening, and process design for the separation of the 2-MeTHF-ACN azeotrope were investigated. According to Fourier-transform infrared spectroscopy and density functional theory, the azeotropy was destroyed via the formation of hydrogen bonds between the extractant dimethyl sulfoxide, 2-MeTHF, and ACN. Vapor–liquid phase equilibrium experiments validated the screening results and develop a thermodynamic model of the binary system. Batch distillation experiments obtained 2-MeTHF with a mass purity of 99.6 wt% and ACN with a mass purity of 99.8 wt%. The ED process was designed using Aspen Plus and improved via the integration of the recovered waste heat (ED-HI). A sequential iterative approach was used to minimize the total annual cost (TAC). The ED-HI process resulted in reductions in the TAC, reboiler heat load, and CO 2 emissions of 20.06 %, 25.77 %, and 22.77 %, respectively, compared to those of the ED process. This study provides valuable insight into the effective separation of 2-MeTHF and ACN.
研究领域:
化学工程
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分离技术
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物理化学
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工艺设计
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制药工业
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Wei Chen,Yan Ding,Fang Wang,Zhixia Xu,Qing Ye,Jinlong Li,Patrice Paricaud
The vapor-liquid equilibria of binary mixtures of ethylene glycol diacetate (EGDA) + o-chlorotoluene (OCT) and EGDA + cyclohexylbenzene (CHB), and the liquid-liquid equilibria (LLE) in ternary mixtures of ethylene glycol (EG) + EGDA + o-chlorotoluene and EG + EGDA + cyclohexylbenzene are measured in this work. The new data have been described with the NRTL thermodynamic model. The heterogeneous extractive distillation and liquid-liquid phase separation process for the investigated systems are then simulated using the Aspen Plus software and the adjusted thermodynamic model. The influence of key process parameters such as the ratio of solvent flow rate to feed flowrate, the plate number and the reflux ratio on the separation process are analyzed in detail, and the optimal process parameters are determined. An economic and environmental study of the process is then performed. It is found that the two extractants (o-chlorotoluene and cyclohexylbenzene) can achieve a good EG + EGDA azeotrope separation. The purities of both EG and EGDA products are greater than 99.50 wt% in the two processes. The predicted selectivity obtained with o-chlorotoluene is higher than the one obtained with cyclohexylbenzene process. However, the cyclohexylbenzene process is found to be was more environmentally friendly, and the utility costs and CO 2 emissions of are lower. This work brings new insights in the design and optimization for the separation of EG and EGDA azeotropic mixtures.
研究领域:
化学工程
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过程系统工程
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热力学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Dan Ren,Shu-Ping Ren,Yakai Lin,Jianhong Xu,Xiao-Lin Wang
Many industries produce large amounts of glycerol-based wastewater, which always contains hazardous organic chlorides. Compared with complicated biological treatments or physical adsorption, membrane separation decreases the cost and saves energy. Strong swelling of traditional thin-film composite (TFC) membranes influence the performance in the separation of organic molecules. Here we prepared TFC membranes with an acrylamide-grafted PAN support layer to copolymerize with m-phenylenediamine (MPD) and trimesoyl chloride (TMC). The link of separative layer and support layer was created like a zipper stitching to enhance the stability and resistance for the removal of organic molecules. An aquatic grass-like layer of acrylamide enlarges the surface area and hydrophilicity with superior separation performances (15.8 LMH bar −1 flux, 72.0% rejection of dichloropropanol (DCP) and 64.6% rejection of glycerol (Gl)). The trade-off upper bound was improved to a high level. We also established the simulations of evaporation using Aspen Plus and mathematical models of reverse osmosis to calculate the energy consumption corresponding to the recycle of glycerol-based wastewater. The experimental and theoretical results illustrate the advantages of acrylamide-grafted TFC membranes in the ap-plications to concentrate organic solutes and treat wastewater.
研究领域:
膜科学
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环境工程
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化学工程
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废水处理
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DOI
高影响因子
危险品化学品经营许可证（带存储）