INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Yang Yu,Huachang Jin,Xindi Jin,Runxin Yan,Li Zhang,Xueming Chen
Electrochemical precipitation has obtained great attentions for water softening in recent years. In order to avoid cathode deactivation, periodical scale detachment is essential. In general, the scale adhered to the cathode is detached by mechanical scraping. Although mechanical scraping is easy operated, elastic scraper must be installed between electrodes, leading to the low softening efficiency and high energy consumption. To overcome such a problem, a new current pulsated electrochemical precipitation process was proposed in this paper. Scale detachment was accomplished by increasing the current density significantly. Experimental results showed that the both high softening and detachment performance were achieved. The precipitation rate was as high as 40.47 g/h/m2. The energy consumption and the total hardness removal efficiency were 8.9–13.2 kWh/kg CaCO3 and 17.8–22.8%, respectively. Repetitive experimental results indicated the current pulsated electrochemical precipitation process could run steadily without any performance decay detected after repetitive operation.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 5
·3146-3157
·
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
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yue Sun,Yuanyuan Wang,Zheng Peng,Yan Liu
Sulfanilic acid (SA) is an important organic compound with numerous applications in industrial production, while the organic wastewater with high salinity is inevitably generated. In this work, desalination strategy of hypersaline SA wastewater was proposed by using bipolar membrane electrodialysis (BMED), which can realize the separation of SA and NaCl in wastewater and the conversion of NaCl into HCl and NaOH simultaneously. The influences of current density, initial concentrations of acid, base, SA and salt were investigated. The results showed that current efficiency decreased and energy consumption increased with an increase in current density. Higher initial concentrations of acid and base were favor to reduce energy consumption but current efficiency was low. At the current density of 40 mA/cm 2 , the initial acid and base concentrations of 0.10 mol/L, the highest concentrations of HCl and NaOH with initial salt concentration in the simulated feed solution of 80 g/L NaCl was 1.17 mol/L and 1.18 mol/L, respectively. Moreover, the total process cost of BMED process was estimated at $1.68/kg HCl and $1.52/kg NaOH respectively under the optimal experimental conditions. These findings confirmed that BMED may be an alternative and cost-effective strategy for treating high salinity SA wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tong Lyu,Zhaoyang Wang,Ruonan Liu,Kun Chen,He Liu,Ye Tian
Simple, low-cost, and high-performance atmospheric water harvesting (AWH) still remains challenging in the context of global water shortage. Here, we present a simple and low-cost macroporous hydrogel for high-performance AWH to address this challenge. We employed an innovative strategy of pore foaming and vacuum drying to rationally fabricate a macroporous hydrogel. The hydrogel is endowed with a macroporous structure and a high specific surface area, enabling sufficient contact of the inner sorbent with outside air and high-performance AWH. The experiments demonstrate that macroporous hydrogels can achieve high-performance AWH with a broad range of sorption humidity [relative humidity (RH) from 100% to even lower than 20%], high water sorption capacity (highest 433.72% of hydrogel’s own weight at ∼98% RH, 25 °C within 60 h), rapid vapor capturing (the sorption efficiency is as high as 0.32 g g–1 h–1 in the first 3 h at 90% RH, 25 °C), unique durability, low desorption temperature (∼50 °C, lowest), and high water-releasing rate (release 99.38% of the sorbed water under 500 W m–2 light for 6 h). The results show that this macroporous hydrogel can sorb water more than 193.46% of its own weight overnight (13 h) at a RH of ∼90%, 25 °C and release as high as 99.38% of the sorbed water via the photothermal effect. It is estimated that the daily water yield can reach up to approximately 2.56 kg kg–1 day–1 in real outdoor conditions, enabling daily minimum water consumption of an adult. Our simple, affordable, and easy-to-scale-up macroporous hydrogel can not only unleash the unlimited possibilities for large-scale and high-performance AWH but also offer promising opportunities for functional materials, soft matter, flexible electronics, tissue engineering, and biomedical applications.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Mingzhu Zhou,Ruihan Chen,Qiao Huang,Long Cang
Power consumption is a key factor that affects the cost of electrokinetic (EK) remediation technology. However, the impact of a periodic electric field on organic pollutant removal and energy saving when using EK enhanced chemical oxidation technology has been unclear. In this study, one experiment with a continuous current and five experiments with periodic electric fields of different periodic frequencies (1:1, 2:1, and 3:1) and power-off times (0.5, 8, and 24 h) combined with peroxymonosulfate (PMS) were performed to remove polycyclic aromatic hydrocarbons (PAHs) from soil. The results showed that the average current decreased along with an increase in the periodic frequencies (from 1:1 to 3:1). However, under the same periodic frequency (2:1) with different power-off times (0.5, 8, and 24 h), the currents were relatively close. Compared to the continuous current treatment, different periodic frequencies and power-off times all improved the PAHs removal rates, particularly those PAHs with high ring numbers. Among them, the treatment with the 2:1 periodic frequency and 1 day power-off time achieved the highest removal efficiency (36.1 % of total PAHs) and successfully enhanced PAHs removal in the anode area. Except for the treatment with the 1:1 periodic frequency and 1 day power-off time, the unit energy consumptions of the other periodic electric field treatments were lower than that of the continuous current treatment. This study demonstrates that a periodic electric field could reduce unit energy consumption and improve the PAHs removal efficiency, and the periodic frequency was a crucial factor. This study provides a new technical option for PMS-enhanced EK remediation of organic polluted soil and promotes the application and development of EK remediation technology.
研究领域:
环境科学
·
污染治理
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Fang Wang,Cheng Ma,Jianbin Huang
Emulsion systems that are independent of preparation conditions and time are ideal models for fundamental emulsion research. However, special strategies are required to form these emulsions, particularly with commonly used oils and emulsifiers that have proven to be more difficult. In this study, an efficient approach to preparing a low-energy emulsion with outstanding stability is reported. This approach is derived from a comprehensive study of the component composition in the residual emulsified fractions in water-separation emulsions. The outstandingly stable emulsion exhibits a highly stacked droplet structure, which can restrict the droplet movement within the disperse medium, accompanied by a stable oil–water interface layer, which can hinder the molecular exchange between droplets and resist droplet destruction under extreme conditions, thereby preventing the demulsification caused by sedimentation, coalescence, and Ostwald ripening. These peculiarities enable the emulsion to remain stable over long periods and at elevated temperatures, even exhibiting a spontaneous tendency to recover to the emulsion after centrifugal phase splitting. This approach lends itself to generalization in the context of multiple surfactants or oil phases, thus establishing a foundation for the study of various emulsifiers and functional emulsions. Moreover, the low-energy-input preparation can reduce energy consumption in the emulsion production, aligning with the principles of green development.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xu Ma,Lijiu Cao,Nian Li,Yunpeng Gong,Yue Hu,Zongxing Yu,Tao Jin,Yufang Chen
Moisture-sensitive materials need to meet the technical requirements of low power consumption, high precision and integratability, which are crucial for the development of new advanced moisture-sensitive devices and humidity sensor technologies. In this work, polyacrylates (PAC) were modified with nano halloysite powders (HNTs) to prepare resistive halloysite/polyacrylate composite moisture-sensitive films (PAC/HNTs) with excellent performances. Compared with the humidity-sensitive performance of PAC, the response time was reduced from 5 s to 0.9 s in the humidity range of 11–96% RH. Particularly, in the 30–96% RH humidity range, the average power consumption of the device was 88.41 μW and exhibited excellent linearity (R = −0.99), low wet hysteresis (5.04% RH), and excellent thermal and long-term stability. Thus, PAC/HNTs hold significant potential in the development of new humidity-sensitive devices and sensors with fast response, low power consumption, high accuracy and integratability.
研究领域:
材料科学
·
传感技术
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2018
·
IF 5.651
Rui Wang,Yaofeng Zhu,Zhuo Shi,Wenbin Jiang,Xiangdong Liu,Qing-Qing Ni
A novel degumming approach by using steam treatment is proposed to minimize water pollution and consumption in silk wet processing. Sericin removal of Bombyx mori silk fibers was carried out with pressurized steam. The degumming ratio, fine structure and physical properties of the degummed silk fibers as well as energy efficiency were investigated to elucidate the degumming effects of steam treatment. Compared to the conventional neutral soap and sodium carbonate (Na 2 CO 3 ) degumming methods, sericin can be removed by steam treatment without any chemicals, and the degumming ratio as well as physicochemical properties of the degummed silk fibers maintained at a desirable level. Energy efficiency and cost analysis showed that steam degumming is more energy-efficient and economical than the conventional chemical degumming methods. Results showed that steam treatment is a feasible silk degumming method with the benefits of reduction in water pollution and energy consumption.
研究领域:
纺织科学
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环境科学
·
材料科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yue Song,Tianran Sun,Long Cang,Song Wu,Dongmei Zhou
Further research into more cost-effective methods to treat toxic metal-ethylenediaminetetraacetate (Me-EDTA) complexes is required due to their high bioavailability. In this study, we compared electrodialysis (ED) with different compartment designs (2-, 3- and 4-compartment designs) and electrochemical oxidation (EO, 1-compartment design) to treat a dilute Cu(II)-EDTA solution (1 mM). After a 48-h treatment with a constant current applied at 32 mA, the Cu removal efficiencies were achieved at 49%, 87%, 79% and 96% for 1-compartment EO and 2- to 4-compartment ED, respectively, and the total organic carbon concentrations decreased from 138 mg/L to 100, 64, 57 and 39 mg/L, respectively. The energy consumptions for 1-compartment EO and 2- to 4-compartment ED were 7.7, 8.4, 13.9 and 15.4 W h, respectively. Based on all above results, the most cost-effective design was determined to be the 2-compartment ED. Moreover, the 3- and 4-compartment ED treatments have faster contaminant removal kinetics than 1-compartment EO and 2-compartment ED. This study clarified the mechanisms of the migration and the transformation of Cu-EDTA during EO and ED with different membrane combinations, which is helpful for improved selection of compartment design for metal-chelate complex removal.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Qiang Sun,Tianhao Li,Yu Mao,Hongxia Gao,Teerawat Sema,Shengyu Wang,Libin Liu,Zhiwu Liang
Amine-based CO2 capture is a promising method to limit global CO2 emissions. However, large thermal energy consumption for CO2 desorption during amine regeneration has limited large-scale worldwide applications. Here, we show that an efficient MCM-41-SO3H-0.6 catalyst presented a superior catalytic performance, decreasing the relative heat duty by one-third and enhancing the instantaneous desorption rate by up to 195% in comparison with the monoethanolamine (MEA) regeneration without catalysts. The excellent catalytic activity is related to the combination of the properties of mesopore surface area × total acid sites, and a possible catalytic mechanism is proposed for the MCM-41-SO3H catalysts. Furthermore, the experimental results in the MEA solution regeneration process were consistent with density functional theory calculations in revealing the catalytic desorption mechanism. This work demonstrated that MCM-41 functionalized with sulfonic acid group catalysts could play an essential role in the post-combustion CO2 capture technology using aqueous MEA for industrial applications.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
Danyan Zhan,Changhui Fu,Zhengting Yu,Guangyi Tian,Yuxuan He,Xionggang Chen,Zhiguang Guo
Hygroscopic salt-hydrogel-based atmospheric water harvesting (HAWH) technology represents an auspicious approach to alleviating the water crisis, as it is not limited by factors such as climactic. Reducing hygroscopic salt leakage is of the utmost importance to maintaining the technology's consistent performance. Consequently, we have developed a composite hygroscopic material (PPy-AAC-LiCl) with in situ loaded polypyrrole (PPy) as a photothermite. The in-situ loading of PPy not only achieves the photothermal performance of PPy-AAC-LiCl but also enhances the hygroscopic performance, which is due to the presence of nitrogen atoms in the structure facilitating the formation of hydrogen bonds between water molecules, and reduces the leakage of hygroscopic salts attributed to its ability to inhibit the increase in pore size after hygroscopicity of PPy-AAC-LiCl. The experimental results show that PPy-AAC-LiCl has effective hygroscopic performance at relative humidity (RH) of 30 %–90 %. The hygroscopicity at 25 °C and RH 70 % was about 1.53 g water g adsorbents −1 after 12 h. After ten hygroscopicity-desorption cycles, the hygroscopicity of the samples did not decrease significantly, and no white crystals appeared on the surface of the samples during the desorption process. Furthermore, PPy-AAC-LiCl demonstrated effective atmospheric water harvesting capabilities in outdoor trials, exhibiting a desorption rate of 87.6 % and a moisture absorption rate of 1.26 g water g adsorbents −1 . The preparation of this simple and environmentally friendly hygroscopic composite material lays the foundation for the future development of atmospheric water materials.
研究领域:
材料科学
·
环境科学
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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
·
化学工程
·
碳捕集与封存
✓ 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）