Separation and Purification Technology最新文献_第9页

Synchronous promotion of ZnIn2S4 sacrificial agent-free photocatalytic hydrogen production by non-metallic doping and construction of heterojunction 通过非金属掺杂和构建异质结同步促进无牺牲剂 ZnIn2S4 光催化制氢

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131102

Linxiu Luo, Long Zhang, Hao Ye, Yuhua Dai, Yu Xie, Yong Chen, Zhenxi Wang, Yifan Zhang

{"title":"Synchronous promotion of ZnIn2S4 sacrificial agent-free photocatalytic hydrogen production by non-metallic doping and construction of heterojunction","authors":"Linxiu Luo, Long Zhang, Hao Ye, Yuhua Dai, Yu Xie, Yong Chen, Zhenxi Wang, Yifan Zhang","doi":"10.1016/j.seppur.2024.131102","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131102","url":null,"abstract":"A review of previously reported materials for photocatalytic hydrogen production reveals that most of these still require the involvement of hole scavengers. To avoid the consumption of non-essential resources, the development of non-precious metal catalyst materials capable of achieving photocatalytic hydrogen production in a sacrificial agent-free environment is of greater value for practical applications. This study successfully prepared x-CdS/NZIS composites. The hydrogen precipitation rate of the 30-CdS/NZIS samples reached 212.81 μmol/g/h, which is 2.8, 20, and 82.8 times higher than that of NZIS, pristine ZIS, and CdS nanorods, respectively. Notably, this result was achieved without the addition of sacrificial agents. The strategy of replacing part of the sulfur with nitrogen doping increases the concentration of photogenerated carriers, improves the charge transfer rate, and suppresses the formation of electron-hole pairs. Furthermore, incorporating CdS nanorods into the composite structure facilitates the formation of type II heterojunctions, effectively suppressing interband electron-hole recombination. The combined implementation of these modification strategies results in the formation of an electron-rich region at the NZIS conduction band, which is conducive to H2 generation, even in the absence of sacrificial agents. This study offers a potential avenue for developing cost-effective solar hydrogen production systems that do not require the use of sacrificial agents.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"84 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flotation separation mechanisms of fluorapatite and muscovite by fatty acid and polyoxymethylene ether phosphate in hard water

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131126

Rui Liu, Lijun Deng, Jianing Chu, Wei Xu, Guoli Zhou, Yun Zhang, Jianyong He, Guosheng Li, Yijun Cao

{"title":"Flotation separation mechanisms of fluorapatite and muscovite by fatty acid and polyoxymethylene ether phosphate in hard water","authors":"Rui Liu, Lijun Deng, Jianing Chu, Wei Xu, Guoli Zhou, Yun Zhang, Jianyong He, Guosheng Li, Yijun Cao","doi":"10.1016/j.seppur.2024.131126","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131126","url":null,"abstract":"Fluorapatite is the primary mineral for phosphorus extraction. However, the removal of impurity minerals like iron and aluminum-bearing ones from the raw ore is difficult due to the existence of calcium ions. In this study, the flotation experiment, contact angle, zeta potential measurement, attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and molecular dynamics (MD) simulations were employed to investigate the synergistic separation mechanisms of sodium oleate (NaOL) and polyoxymethylene ether phosphate (APE-10P) in hard water. Flotation and contact angle results show the mixture of APE-10P/NaOL can significantly improve the selective flotation of fluorapatite in the presence of Ca2+. The mixture of APE-10P/NaOL with a molar ratio of 1:3 led to the best selectivity index of 40.67. Zeta potential analysis, ATR-FTIR, and XPS results disclosed that both NaOL and APE-10P have chemically adsorbed onto fluorapatite surfaces in the presence of Ca2+. MD simulations further confirmed that NaOL and APE-10P can assemble at the surface to form molecular associations and weaken their bonding interactions with muscovite surfaces activated by Ca2+. This study sheds new light on the synergistic effect between NaOL and APE-10P and may benefit the development of new approaches to process low-grade phosphate ore resources.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"40 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric water harvesting using sulfonated macroporous and hypercrosslinked polystyrene-divinylbenzene beads in a prototype system 在原型系统中使用磺化大孔和超交联聚苯乙烯-二乙烯基苯珠收集大气中的水

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131096

Mahmoud Parvazinia

引用次数: 0

An ultramicroporous metal-organic framework with multiple supramolecular binding sites for efficient natural gas and MTO products separation 具有多个超分子结合位点的超微孔金属有机框架，用于高效分离天然气和甲基氧化钨产品

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131115

Ya-Nan Li, Qiang Gao, Yaru Dang, Sihui Wang, Fang Han, Ruihan Wang, Li-Zhuang Chen

引用次数: 0

Diglycolamide with long C-chains combined with ether bonds for high loading of Am(III) and Eu(III): Extraction, aggregation, and third-phase formation studies

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131113

Xiaoyang Hu, Haowei Xu, Zhuang Wang, Qiao Yu, Xuanhao Huang, Xingyue Liu, Qiang Tian, Songdong Ding

{"title":"Diglycolamide with long C-chains combined with ether bonds for high loading of Am(III) and Eu(III): Extraction, aggregation, and third-phase formation studies","authors":"Xiaoyang Hu, Haowei Xu, Zhuang Wang, Qiao Yu, Xuanhao Huang, Xingyue Liu, Qiang Tian, Songdong Ding","doi":"10.1016/j.seppur.2024.131113","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131113","url":null,"abstract":"Diglycolamide (DGA) extractants, especially TODGA (N,N,N′,N′‐tetraoctyl diglycolamide), show significant potential in high-level liquid waste treatment. However, their limited loading capacity for trivalent lanthanides (Lns) and actinides (Ans) often leads to detrimental emulsification or third phase formation, hindering their practical applicability. Herein, TOOEDGA (N,N,N’,N’-tetra(2-(octyloxy)ethyl)diglycolamide), a new DGA extractant with long C-chains combined with ether bonds, exhibits superior extraction performance towards Am3+ and Eu3+ in HNO3 solution compared to TODGA. The factors influencing the formation of a third phase during the extraction process were investigated. It has been shown that TOOEDGA has a greater loading capacity for Lns3+ and can tolerate a wider concentration range of HNO3. Additionally, the aggregation behavior of DGAs in n-dodecane was also studied using dynamic light scattering and small-angle X-ray scattering, revealing that the reverse micelles formed by TOOEDGA are more stable than those formed by TODGA. Moreover, under similar conditions, TOOEDGA molecules do not aggregate further to generate rod-like reverse micelle aggregates like those observed with TODGA, which is beneficial to inhibit the formation of the third phase. Consequently, our results suggest that TOOEDGA holds great promise as an alternative DGA extractant for practical industrial applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"89 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning-driven green solvent design and process intensification towards isopropyl alcohol-water azeotrope system

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-16 DOI: 10.1016/j.seppur.2024.131103

Qin Wang, Pan Dai, Ao Yang, Weifeng Shen, Jun Zhang

{"title":"Deep learning-driven green solvent design and process intensification towards isopropyl alcohol-water azeotrope system","authors":"Qin Wang, Pan Dai, Ao Yang, Weifeng Shen, Jun Zhang","doi":"10.1016/j.seppur.2024.131103","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131103","url":null,"abstract":"Extraction distillation and azeotropic distillation are two important methods for separating isopropyl alcohol (IPA) and water azeotrope. However, azeotropic distillation is generally more energy-intensive than extractive distillation separation process. Therefore, solvent design and process intensification for the extractive distillation process are the keys to addressing the problems of azeotropic separation and reducing energy consumption. In this contribution, a deep learning-based solvent high throughput screening framework was proposed to design the green solvent for separating the IPA/water mixtures. All properties, such as thermodynamic properties and EH&S properties, used for screening were predicted by the deep learning-based predictive models. From more than 108 individual molecules, five green solvent candidates were screened for the separation of IPA/water azeotrope. The energy consumption analysis of 5 solvents shows that ethylene glycol as solvent has the lowest separating energy consumption. Finally, the heat integration and heat pump distillation of the extractive distillation separation process was carried out, and the energy-saving potential reached 45.86%.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"93 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrifying distillation − Optimization-based evaluation of internally heat-integrated distillation columns 蒸馏电气化 - 基于优化的内部热集成蒸馏塔评估

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-15 DOI: 10.1016/j.seppur.2024.131061

Momme Adami, Kayenat Farheen, Mirko Skiborowski

{"title":"Electrifying distillation − Optimization-based evaluation of internally heat-integrated distillation columns","authors":"Momme Adami, Kayenat Farheen, Mirko Skiborowski","doi":"10.1016/j.seppur.2024.131061","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131061","url":null,"abstract":"Improving the energy efficiency of distillation processes is essential for reducing the chemical industry’s substantial energy demand and environmental footprint. The use of mechanical heat pumps with compressors is an important asset in this transformation process, as it not only enables the recovery of heat rejected at low temperature, reducing external energy requirements, but also facilitates the electrification of chemical processes and distillation in specific. The necessary temperature lift dictates the required compression rate for the compressor and is therefore of considerable importance for the applicability of mechanical heat pumps. By operating the rectifying and stripping sections of a column at different pressures and enabling heat exchange between the respective sections, temperature lift and compression ratio can be reduced for the so-called Internally Heat-Integrated Distillation Columns compared to mechanical vapor recompression. In order to enable a quick problem specific evaluation of the possible benefits of this concept we propose two novel superstructure models for optimal design, that allow for heat exchange between stages at the same height or arbitrary stages in the rectifying and stripping section, provided a minimum temperature difference is maintained. The respective optimization problems are solved as a series of successively relaxed mixed-integer nonlinear programming problems in GAMS. An automatic stepwise initialization and optimization strategy provides a computationally efficient approach for the determination of optimized designs","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"35 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Membrane/Absorption-Adsorption separation of Hydrogen-Blended natural gas at receiving Terminal: Process Modelling and Multi-Objective optimization

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-15 DOI: 10.1016/j.seppur.2024.131088

Ninghan Gao, Xiang Mao, Nan Nan, Tianqing Zhang, Bei Liu, Changyu Sun, Guangjin Chen, Chun Deng

{"title":"Hybrid Membrane/Absorption-Adsorption separation of Hydrogen-Blended natural gas at receiving Terminal: Process Modelling and Multi-Objective optimization","authors":"Ninghan Gao, Xiang Mao, Nan Nan, Tianqing Zhang, Bei Liu, Changyu Sun, Guangjin Chen, Chun Deng","doi":"10.1016/j.seppur.2024.131088","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131088","url":null,"abstract":"Hydrogen energy is an important, abundant, green, low-carbon, and widely applicable source. Using natural gas pipelines for long-distance hydrogen transportation is expected to become a significant hydrogen transport method. Therefore, efficiently recovering hydrogen at the pipeline terminal is particularly critical, with the core challenge being the effective separation of H2/CH4. Traditional methods, such as single-stage membrane separation and fixed-bed pressure swing adsorption, struggle to purify low-concentration hydrogen with a high hydrogen recovery ratio efficiently. This study proposes a hybrid membrane/absorption-adsorption separation process. Mathematical models have been constructed for the membrane separation unit, the absorption-adsorption separation unit, and the hybrid membrane/absorption-adsorption separation process. The suitable ranges of operating parameters are determined using sensitivity analysis. Next, a multi-objective optimization model is used to optimize operating parameters, maximize the hydrogen recovery ratio, and minimize energy consumption. Results show that the H2 concentration in product gas can be enriched from 20 to 99.97 mol%, the hydrogen recovery ratios ranges from 98 to 98.93 %, and the energy consumption per unit of feed gas ranges from 0.2233 to 0.2757 kW⋅h−1/Nm3, while the energy consumption per unit of product gas ranges from 0.9417 to 1.1611 kW⋅h−1/Nm3 under different scenarios at the natural gas receiving station.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"27 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spontaneous supergravity field drives liquid-phase microelements to enhance CO2 capture through self revolution coupling

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-15 DOI: 10.1016/j.seppur.2024.131058

Xiaoxu Duan, Caijiao Cong, Liwang Wang, Yongcong Liu, Zhisheng Zhao, Jiwei Wu, Liang Ma

{"title":"Spontaneous supergravity field drives liquid-phase microelements to enhance CO2 capture through self revolution coupling","authors":"Xiaoxu Duan, Caijiao Cong, Liwang Wang, Yongcong Liu, Zhisheng Zhao, Jiwei Wu, Liang Ma","doi":"10.1016/j.seppur.2024.131058","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131058","url":null,"abstract":"In the pursuit of global carbon neutrality, the emissions of carbon-containing flue gas resulting from methanol production pose a significant challenge to the chemical industry’s efforts to achieve this goal. It is imperative to develop cost-effective and low-carbon carbon capture technologies. This study introduces the hydro-jet oscillating purifier (HOP) that utilizes spontaneous supergravity to promote the self-revolution coupling motion of liquid-phase microelements, thereby enhancing mass transfer efficiency. The research further investigates the effect of the HOP’s overflow pipe model on the mass transfer process and determines optimal parameters for carbon capture. The gas phase generates a vortex supergravity field that disrupts the liquid column, leading to the formation of uniformly dispersed liquid-phase microelements that engage in self-revolution coupling motion. The presence of these liquid-phase microelements increases the turbulent kinetic energy within the vortex supergravity field, which accelerates the movement of surface molecules in the liquid phase. Mass transfer efficiency and carbon capture efficiency can be improved by increasing the mass transfer area, increasing the absorption capacity, and minimizing the liquid film resistance. A mass transfer coefficient model was established for various overflow pipe lengths, resulting in a maximum mass transfer coefficient of 36 kmol·kPa−1·m−3·s−1 and a carbon capture efficiency of 83%. This article presents a high-efficiency technology for flue gas carbon capture, which is expected to facilitate the low-carbon transition in the chemical industry and support the timely achievement of carbon neutrality goals.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"85 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioinspired tree-like electroactive poly(lactic acid) nanofibers with enhanced surface activity and interfacial polarization for intelligent health management

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2024-12-15 DOI: 10.1016/j.seppur.2024.131065

Mengyuan Shen, Jiaqi Li, Lv Ke, Yifan Zhang, Guiying Zhu, Xiang Li, Jia-Qiong Li, Jiang Shao, Xinjian He, Mingming Zhang, Huan Xu

{"title":"Bioinspired tree-like electroactive poly(lactic acid) nanofibers with enhanced surface activity and interfacial polarization for intelligent health management","authors":"Mengyuan Shen, Jiaqi Li, Lv Ke, Yifan Zhang, Guiying Zhu, Xiang Li, Jia-Qiong Li, Jiang Shao, Xinjian He, Mingming Zhang, Huan Xu","doi":"10.1016/j.seppur.2024.131065","DOIUrl":"https://doi.org/10.1016/j.seppur.2024.131065","url":null,"abstract":"Poly(lactic acid) (PLA)-based nanofibrous membranes (NFMs) have significant potential for use in biodegradable filters for air purification, but their application is often limited by relatively poor electret properties. Herein, tree-inspired gradient PLA (TG-PLA) nanofibers with biomimetic surfaces and remarkable electroactivity were fabricated by coaxial electrospinning of a unique core–shell structure. Importantly, the bioinspired structure conferred dramatic increase of dielectric constant for TG-PLA NFMs by 218 %, as well as enhanced in situ electret properties (over 3-fold rise of surface potential). The well-controlled morphological features and increased electroactivity contributed synergistically to distinct promotion of active PM-capturing performance, as exemplified by 99.25 % filtration of PM0.3 at the airflow velocity of 32 L/min for TG-PLA2, largely surpassing the counterpart (only 89.63 %). Benefiting from the significantly increased electroactivity, TG-PLA2 exhibited superior energy harvesting performance and long-term stability (output voltage of 44.7 V, over 2000-second cycle test). Furthermore, a convolutional neural network (CNN) algorithm was developed to establish an intelligent respiratory recognition system, demonstrating high-accuracy diagnosis of multiple complex scenarios. The exceptional promotion in the surface activity and intrinsic electroactivity for PLA nanofibers is of enormous potential for environmental applications. Our bioinspired strategy can lead to a versatile platform that integrates with profound property improvements and scale-up feasibility for intelligent protective membranes.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"35 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0