SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xiangzhi Xue,Zheng Liang,Jian Zhou,Huiqin Zhang,Qilin Gu,Zhaoxiang Zhong,Weihong Xing
Brine purification process using ceramic membrane has the advantages of short process, high filtration precision, low cost and long life. Silicon carbide (SiC) ceramic membranes are featured by excellent hydrophilicity and unique negatively charged surface. This work focused on the application of low-temperature reaction bonded SiC membranes in brine purification, and commercial SiC membranes prepared by the recrystallisation method were also adopted for comparison. Under low-energy conditions (transmembrane pressure ≤0.1 MPa, crossflow velocity ≤2 m·s -1 ), the low-temperature reaction bonded SiC membranes exhibited higher stable flux and superior antifouling performance (i.e., lower flux decline), attributed to the formation of a cake layer on the membrane surface. However, at high pressures (>0.1 MPa) and velocities (>2 m·s -1 ), some precipitated particles entered the pores of reaction bonded SiC membranes, resulting minor pore blockage, reducing permeability. Interestingly, the gradually increased initial permeate flux observed in cycling filtration was attributed to the increased surface hydrophilicity of SiC membranes. Therefore, low-temperature reaction bonded SiC membranes can provide a high-efficient and energy-saving brine purification process in the chlor-alkali industry.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hanpeng Gao,Siyu Chang,Yan Liu,Zong Meng,Zhiwu Han,Luquan Ren
Biomimetic surfaces that can manipulate droplets have attracted intense attention because of their application prospects in the fields of drug detection, cell sorting, bio-sensor, etc. Although many promising advances have been made, it is still a challenge to achieve lossless, no cross-contamination and on-demand controllable manipulation of underwater oil droplets without external energy input. Herein, SHI & SLIP interlaced wetting smart surfaces were fabricated by a simple strategy for manipulating underwater oil droplets. Depending on the switchable wettability and reasonable alternating wetting, the lubricant-infused area and superhydrophilic area can be on-demand controlled on the same surface. Numerical calculation and theoretical analysis reveal that the energy barrier between different interfaces is an important factor to realize underwater oil droplet manipulation. By the rational design of the interlaced wetting pattern, the capture, lossless transfer, fusion and directional transportation of underwater oil droplets were realized. Besides, the as-prepared surface has cross-contamination resistance, stable wettability and rewritability, which expands the application field and improves the potential value. We expect this work to open new avenues for flexible and controllable manipulation of underwater oil droplets and promote the development of smart microfluidic platform. It is also expected to be used in unpowered delivery systems, micro-reactions and energy transfer.
研究领域:
材料科学
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仿生学
·
微流控技术
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2021
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IF 3.605
Minghui Zhang,Yingying Liu,Yingming Zhu,Kejing Wu,Houfang Lu,Bin Liang
The complexation of metal ions and amines can mediate the chemical equilibrium and the thermal effect between amines and CO2, thus promoting the absorption and desorption of CO2 in amine absorbents. In this work, the effects of Cu(II) on the performances of CO2 absorption and desorption in the Cu(II)–MMEA (2-(methylamino)ethanol)–H2O system were studied. The thermal desorption results show that the temperature increase during CO2 absorption can be mitigated in the presence of Cu(II), and the desorption performance of CO2 can be obviously improved at 75–95 °C. Using the thermal desorption at 85 °C, the CO2 desorption efficiency of MMEA solution containing 0.1 M [Cu] is 16.4% higher than that without cupric ions, and the regeneration energy consumption is reduced by 25%. The electrochemical research results indicate that the electrode structure and temperature affect the electrolysis rate of anodic copper, and the temperature is the key factor to enhance the CO2 desorption rate. Only considering the decomposition voltage, the energy consumption of the absorbent regeneration is 0.5 GJ/t CO2 at 50 °C, which is much lower than that of the thermal desorption method. The anode current efficiency is always about 100%. Increasing the temperature can increase the cathode current efficiency. When nickel foam with a large specific surface area is used as the cathode, the current efficiency can be increased to 100% at 50 °C. The CO2 desorption is significantly improved in a Cu(II)-assisted MMEA–H2O system. The electrochemical method can achieve a desired desorption at a relatively low temperature and greatly reduce the energy consumption of amine absorbent regeneration.
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
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 46
·2005413
·
IF 16.836
Jiangdong Gong,Haiyang Yu,Xin Zhou,Huanhuan Wei,Mingxue Ma,Hong Han,Shuo Zhang,Yao Ni,Yuelong Li,Wentao Xu
Polycrystalline organometal halide perovskite films have been recently exploited as the active layer in artificial synapses, demonstrating the basic functional emulation of biological synapses. However, for the implementation of neuromorphic computing and bioinspired intelligent systems, full synapse-like functionality with a simple structure and extremely low energy consumption are of crucial importance. Here, a modified thickness-confined surfactant-assistant self-assembly strategy is proposed to synthesize CH 3 NH 3 PbBr 3 single-crystalline thin platelets (SCTPs) and a two-terminal lateral-structured synaptic device with ultralow operating current down to sub-pA is fabricated. Essential synaptic behaviors are realized, including paired-pulse facilitation, spike-dependent plasticity, transition from sensory memory to short-term memory and potentiation/depression. Furthermore, the activity-dependent plasticity is also demonstrated on the SCTP-based artificial synapse, which may enable nociceptors to detect intense external harm. These results provide a new protocol for designing lateral-structured synaptic devices based on hybrid perovskite SCTPs and future neuromorphic bioelectronics.
研究领域:
材料科学
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神经形态计算
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生物电子学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Hui-Ye Jiang,Guo-Li Chen,Yu-Ying Xin,Shi-Kai Shen,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The fabrication of low-temperature and high-response WO 3 -based gas sensor is very important for effective detection of hazardous nitric oxide , but the less association has been reported to date. Herein, cheap absorbent cottons were simply soaked into ethanol solution of tungsten hexachloride , and then the immersed template was calcined for preparing WO 3 materials with tubular morphology. Among, WO 3 -600 microtubules obtained by calcining at 600 °C are formed by the inter-linkage of nanoscale particles with better crystallinity , and possess small-size mesopores , low initial resistance and large specific surface area , as well as rich oxygen vacancy defects. Their synergism ensures its high sensing ability to ppb-level NO at low energy consumption. At lower 92 °C, WO 3 -600 sensor realizes a response value ( S = R g/ R a, R g and R a being the resistances in tested gas and air) of 167.1 toward 1 ppm NO gas, being higher than vast majority of reported WO 3 -based NO sensors. At the meantime, the sensor also possesses characteristics of fast recovery (13 s, the time for the change from R g to 10 % R g + 90 % R a), low actual detection concentration (50 ppb) and theoretical limit of detection (45 ppb), large sensitivity (the slope of calibration curve between sensor response and gas concentration) of 170.1 ppm −1 during 50–1000 ppb concentrations, as well as good selectivity , reproducibility, moisture tolerance and 60 days’ stability. In addition, we also analyzed the enhanced NO sensing mechanism.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Ebrahim Ataeivarjovi,Zhigang Tang,Jian Chen,Zhijun Zhao,Guo Dong
Currently, there is strong interest in carbon capture and absorption as a means of reducing carbon dioxide emissions and combating climate change. Unfortunately, the current and traditional methods to achieve such goals are not economical, because they require a huge absorption–desorption plant with high investment and operating costs and high recycle rates of chemical absorbers. In this paper, we propose a novel CO2 capture method combining dimethyl carbonate as a physical solvent and polydimethylsiloxane (PDMS)/TiO2 nanocomposite as a desorption membrane. The effects of TiO2 concentration, feed temperature, and permeate pressure on the pervaporation process for CO2 capture were studied. Results showed that the addition of TiO2 nanoparticles (up to 5 wt %) resulted in 3.61 kg/m2·h flux and 44.68 selectivity of the membrane. The presence of TiO2 nanoparticles in the PDMS membrane not only increased the performance of membrane’s but also reduced (about 72%) energy consumption. To corroborate our experimental findings, a simple simulation was conducted by Gaussian 09. The modeling results demonstrated that the incorporation of TiO2 nanoparticles to the PDMS led to favorable absorption of CO2 compared with the composite one. These results indicate a novel and promising method to capture CO2 effectively and economically for industrial purposes.
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
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Kaixuan Wang,Kun Zhao,Xin Qin,Shuo Chen,Hongtao Yu,Xie Quan
Electrochemical anodic oxidation (AO) is a promising technology for wastewater treatment due to its strong oxidation property and environmental compatibility. However, it suffers from high energy consumption for pollutants removal due to the side-reactions of hydrogen evolution reaction on cathode and oxygen evolution reaction on anode. Combining electro-Fenton (EF) with AO not only generated •OH for pollutants degradation but also increased current efficiency. This work investigated a synergic electrocatalysis process between EF and AO with Ti 3+ self-doped TiO 2 nanotube arrays (Ti 3+ /TNTAs) electrode as both cathode and anode for wastewater treatment. The pseudo-first-order kinetic rate constant of phenol degradation by EF+AO (0.107 min −1 ) was 9.7 or 6.3 times as much as that of only EF (0.011 min −1 ) or AO (0.017 min −1 ) process, respectively. Enhanced pollutants removal of EF+AO could be attributed to the coexistence of •OH oxidation and direct oxidation on Ti 3+ /TNTAs surface. The COD of secondary effluent of coking wastewater decreased from 159.3 mg L −1 to 47.0 mg L −1 by EF+AO within 120 min with low specific energy consumption (9.5 kWh kg −1 COD −1 ). This work provided a new insight into design of the energy-efficient synergic electrocatalysis process for refractory pollutants degradation.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 101
·期 7
·3771-3785
·
IF 2.5
Siying Wang,Lanlan Xie,Qilei Yang,Yuting Geng,Hedi Kang,Xiuhua Zhao
This study aimed to obtain paeonol with high purity by using the combination of steam distillation and antisolvent recrystallization (ASR) and to reduce the energy consumption and CO 2 emission in the preparation process. First, different experimental parameters were optimized by response surface methodology (RSM). Under the optimal conditions, the purity and yield of the as-obtained paeonol were about 98% and 56.97%, respectively. The physicochemical properties of purified paeonol were tested, showing consistency with those of standard paeonol. The energy consumption and CO 2 emission of the preparation process of ASR and single-solvent recrystallization were also investigated. Results showed that the energy consumption and CO 2 emission of ASR were about 4.41 J/mg and 0.006 kg/mg, respectively, which were 6.89 J/mg and 0.0095 kg/mg lower than those of ethanol recrystallization, respectively, and 50.22 J/mg and 0.0144 kg/mg lower than methanol those of recrystallization, respectively. The above results showed that ASR could obtain paeonol with high purity in a high-efficiency, low-energy, and environmentally protective manner.
研究领域:
中药化学
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环境科学
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制药工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Chen Wang,Weixin Kong,Zhangfeng Dong,Bihong Lv,Guohua Jing,Zuoming Zhou
Phase change absorbents based on amine chemical absorption for CO 2 capture exhibit energy-saving potential, but generally suffer from difficulties in CO 2 regeneration. Alcohol, characterized as a protic reagent with a low dielectric constant, can provide free protons to the rich phase of the absorbent, thereby facilitating CO 2 regeneration. In this investigation, N-aminoethylpiperazine (AEP)/sulfolane/H 2 O was employed as the liquid-liquid phase change absorbent, with alcohol serving as the regulator. First, appropriate ion pair models were constructed to simulate the solvent effect of the CO 2 products in different alcohol solutions. The results demonstrated that these ion pair products reached the maximum solvation-free energy (Δ E solvation ) in the rich phase containing ethanol (EtOH). Desorption experiment results validated that the inclusion of EtOH led to a maximum regeneration rate of 0.00763 mol/min, thus confirming EtOH's suitability as the preferred regulator.. Quantum chemical calculations and 13 C NMR characterization were performed, revealing that the addition of EtOH resulted in the partial conversion of AEP-carbamate (AEPCOO − ) into a new product known as ethyl carbonate (C 2 H 5 OCOO − ), which enhanced the regeneration reactivity. In addition, the decomposition paths of different CO 2 products were simulated visually, and every reaction's activation energy (Δ E act ) was calculated. Remarkably, the Δ E act for the decomposition of C 2 H 5 OCOO − (9.465 kJ/mol) was lower than that of the AEPCOO − (26.163 kJ/mol), implying that CO 2 was more likely to be released. Finally, the regeneration energy consumption of the alcohol-regulated absorbent was estimated to be only 1.92 GJ/ton CO 2 , which had excellent energy-saving potential.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Juan Wang,Xiaoyu Wang,Qianlong Fu,Jinxiu Fu,Fengrui Zhai,Shuang Li
Silicon carbide ceramic membranes have been widely used in the treatment of various corrosive and high temperature wastewaters. However, SiC is a compound with strong covalent bond , thus the sintering temperature and then the energy consumption during sintering of SiC ceramics is high, which inhibits the scale-up manufacturing of SiC ceramic membranes . Here, a silicon carbide ceramic membrane support was prepared at 800 °C with a low melting-point glaze as the sintering aid. The glaze infiltrated the SiC skeleton during sintering, and gave rise to high fracture strength of the porous ceramics . With the content increase of sintering aid from 10 wt% to 30 wt%, the pore-formation mechanism of the ceramic membrane support transformed from SiC particles packing to SiC aggregations packing, leading to the increase in pore size and decrease in porosity. The permeance and selectivity of the support was investigated via pure-water and oil-in-water emulsion tests. Due to the high hydrophilicity, the pure-water flux increased from 32 L/(m 2 ·h) to 87 L/(m 2 ·h) while the oil rejection decreased from 99.0% to 93.1% with the increase of trans -membrane pressure. This work provides a feasible route for the preparation of SiC porous ceramics with low energy consumption.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Yuna Gu,Qiancheng Xia,Bin Liu,Yang Zhao,Liangtao Pu,Jie Ding,Yanbiao Liu,Enze Li,Chad D. Vecitis,Guandao Gao
Demulsification technology for separation of oil–water (O/W) emulsions, especially those stabilized by surfactants, is urgently needed yet remains highly challenging due to their inherent stability characteristics. Electrocoalescence has emerged as a promising solution owing to its simplicity, efficacy, and versatility, yet hindered by substantial energy consumption (e.g., >50 kWh/m3) along with undesirable Faradic reactions. Herein, we propose an innovative electric demulsification technology that leverages conductive membrane microchannels to confine oil droplets from the oil–water emulsion for achieving high energy-efficient coalescence of oil droplets. The proposed system reduces the required voltage down to 12 V, 2 orders of magnitude lower than that of conventional electrocoalescence systems, while achieving a similar separation efficacy of 91.4 ± 3.0% at a low energy consumption (3 kWh/m3) and an ultrahigh permeability >3000 L/(m2·h·bar). In situ fluorescence microscopy combined with COMSOL simulations provided insight into the fundamental mechanistic steps of an electric demulsification process confined to membrane microchannels: (1) rapid electric-field redistribution of oil droplet surfactant molecules, (2) enhanced collision probability due to confined oil droplet concentration under dielectrophoretic forces, and (3) increased collision efficacy facilitated by the membrane pore structure. This strategy may revolutionize the next generation of demulsification and oil–water separation innovations.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Chemical Engineering
·
2023
·
IF 0
Chi Ma,Lihong Zhao,Zhengxin Mao,Hao Su,Qingfen Liu
Industrial pharmaceutical wastewater usually contains butyl acetate (BA) with a concentration of 1 wt%–7 wt%, and the traditional method for BA recovery is distillation with high energy consumption. Adsorption method is developed to recover BA with low concentration for the high efficiency and low energy consumption. Medium polar polyacrylate resins with macroporous structure of 233.1 nm and average particle size of about 526.5 μm are successfully synthesized by suspension polymerization and used for the BA adsorption and desorption. The maximum adsorption capacity reaches 171.1 mg g −1 with relative standard deviation (RSD) value of 0.2%, which is more than twice the results in the literature. The BA desorption rate is 97.0% at 100 °C with RSD value of 0.4%, and the resins are beneficial to the reuse in the adsorption-desorption cycle. The adsorption thermodynamics and kinetics are investigated, and the BA adsorption is a spontaneous and endothermic process with the increase of disorder degree. This process is mainly contributed by physical absorption and agree well with Freundlich model and pseudo-first-order adsorption kinetic model. The adsorption method avoids boiling a large amount of wastewater and hopefully provides a novel alternative technology for the BA recovery.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
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