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A master-slave generalized predictive synchronization control for preheating process of multi-cavity hot runner system

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Chinese Journal of chemical engineering 2023年第10期62卷 270-280页

作者： Hongyi Qu Shengyong Mo Ke Yao Zhao-Xia Huang Zhihao Xu Furong Gao Institute of Intelligent Manufacturing Guangdong Academy of SciencesGuangdong Key Laboratory of Modern Control TechnologyGuangzhou 510070China Fok Ying Tung Graduate School The Hong Kong University of Science and TechnologyGuangzhou 511442China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China National Engineering Research Center of Novel Equipment for Polymer Processing Department of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510641China

As a key component of injection molding,multi-cavity hot runner(MCHR)system faces the crucial problem of polymer melt filling imbalance among the *** thermal imbalance in the system has been considered as the leading ***,the solution may rest with the synchronization of those heating processes in MCHR *** paper proposes a’Master-Slave’generalized predictive synchronization control(MS-GPSC)method with’***’strategy for preheating stage of MCHR *** core of the proposed method is choosing the heating process with slowest dynamics as the’Master’to track the setpoint,while the other heating processes are treated as‘Slaves’tracking the output of’Master’.This proposed method is shown to have the good ability of temperature *** corresponding analysis is conducted on parameters tuning and stability,simulations and experiments show the strategy is effective.

关键词： process control Thermodynamics process Model-predictive control Multi-cavity hot runner system Master-Slave synchronization Mr.Slowest

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Non-invasive estimation of the powder size distribution from a single speckle image

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Light(Science & Applications) 2024年第10期13卷 2221-2230页

作者： Qihang Zhang Ajinkya Pandit Zhiguang Liu Zhen Guo Shashank Muddu Yi Wei Deborah Pereg Neda Nazemifard Charles Papageorgiou Yihui Yang Wenlong Tang Richard D.Braatz Allan S.Myerson George Barbastathis Department of Electrical Engineering and Computer Science Massachusetts Institute of TechnologyCambridgeMA 02139USA Singapore-MIT Alliance for Research and Technology(SMART)Centre Singapore 117543Singapore Department of Chemical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Process Chemistry Development Takeda Pharmaceuticals International Co40 Landsdowne StCambridgeMA 02139USA ShinrAI Center for AI/ML Data Sciences InstitutesTakeda Pharmaceuticals International Co650 E Kendall StCambridgeMA 02142USA Present address:Department of Precision Instruments Tsinghua UniversityBeijing 100084China

Non-invasive characterization of powders may take one of two approaches:imaging and counting individual particles;or relying on scattered light to estimate the particle size distribution(PSD)of the *** former approach runs into practical difficulties,as the system must conform to the working distance and other restrictions of the imaging *** latter approach requires an inverse map from the speckle autocorrelation to the particle *** principle relies on the pupil function determining the basic sidelobe shape,whereas the particle size spread modulates the sidelobe *** recently showed that it is feasible to invert the speckle autocorrelation and obtain the PSD using a neural network,trained efficiently through a physics-informed semi-generative *** this work,we eliminate one of the most time-consuming steps of our previous method by engineering the pupil *** judiciously blocking portions of the pupil,we sacrifice some photons but in return we achieve much enhanced sidelobes and,hence,higher sensitivity to the change of the size *** result is a 60×reduction in total acquisition and processing time,or 0.25 seconds per frame in our *** real-time operation in our system is not only more appealing toward rapid industrial adoption,it also paves the way for quantitative characterization of complex spatial or temporal dynamics in drying,blending,and other chemical and pharmaceutical manufacturing processes.

关键词： speckle size distribution

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Identification and semisynthesis of(-)-anisomelic acid as oral agent against SARS-CoV-2 in mice

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National Science Review 2022年第11期9卷 29-36页

作者： Hai-Xin Yu Nan Zheng Chi-Tai Yeh Chien-Ming Lee Qi Zhang Wen-Lv Zheng Qing Chang Yuan-He Li Yu-Jun Li Gui-Zhen Wu Jun-Min Quan Lin-Qi Zhang Yew-Min Tzeng Zhen Yang Laboratory of Chemical Genomics School of Chemical Biology and Biotechnology Peking University Shenzhen Graduate School Department of Medicinal Research and Education Taipei Medical University-Shuang Ho Hospital Department of Applied Science Taitung University Center for Global Health and Infectious Diseases Comprehensive AIDS Research Center and Beijing Advanced Innovation Center for Structural Biology School of Medicine Tsinghua University Lanzhou Institute of Separation Science State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science(BNLMS) College of Chemistry and Molecular EngineeringPeking University Shenzhen Bay Laboratory NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Department of Applied Chemistry Chaoyang University of Technology

(-)-Anisomelic acid, isolated from Anisomeles indica(L.) Kuntze(Labiatae) leaves, is a macrocyclic cembranolide with a trans-fused α-methylene-γ-lactone motif. Anisomelic acid effectively inhibits SARS-Co V-2 replication and viral-induced cytopathic effects with an EC50 of 1.1 and 4.3 μM, *** studies of SARS-CoV-2-infected K18-hACE2 mice showed that oral administration of anisomelic acid and subcutaneous dosing of remdesivir can both reduce the viral titers in the lung tissue at the same level. To facilitate drug discovery, we used a semisynthetic approach to shorten the project timelines. The enantioselective semisynthesis of anisomelic acid from the naturally enriched and commercially available starting material(+)-costunolide was achieved in five steps with a 27% overall *** developed chemistry provides opportunities for developing anisomelic-acid-based novel ligands for selectively targeting proteins involved in viral infections.

关键词： identification enantioselective semisynthesis (−)-anisomelic acid oral agent anti-SARS-CoV-2

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Carboxymethylation of the polysaccharide from the fermentation broth of Marasmius androsaceus and its antidepressant mechanisms

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Food Science and Human Wellness 2023年第6期12卷 2417-2427页

作者： Yu Qiu Yan Su Jia Song Fangming Mou Jia Gou Xiaoqi Geng Xinyue Li Zhiqiang Nie Jianxin Wang Yu Zheng Min Wang State Key Laboratory of Food Nutrition and Safety Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process ControlCollege of BiotechnologyTianjin University of Science&TechnologyTianjin 300457China Key Laboratory of Chemical Biology and Molecular Engineering Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuan 030006China Wisconsin Center for NanoBioSystems School of PharmacyUniversity of Wisconsin-MadisonMadisonWI 53706USA Pharmaceutical Sciences Division School of PharmacyUniversity of Wisconsin-MadisonMadisonWI 53706USA

To investigate the structure-activity relationship of polysaccharide and obtain a better antidepressant polysaccharide,the antidepressant-like activity of a carboxymethyl polysaccharide(C-MEPS2)subjected to submerged fermentation was systematically ***12-H cell and Kunming mice were used to investigate the differences and their mechanism in the antidepressant effects of C-MEPS2 and *** experiments have showed that C-MEPS2 has a better antidepressant effect than MEPS2.C-MEPS2 could exert antidepressant effects related to catecholamine synthesis with specifi c sites of TH,D2DR,and *** addition,C-MEPS2 could repair the Res-induced damage in PC12-H cell,stabilize the mitochondrial membrane potential and regulate intracellular Ca^(2+) concentration,thus reducing cell apoptosis caused by *** common dosing experiments on animals further proved that CMEPS2 could signifi cantly improve the antidepressant effect of derivatives without affecting the antidepressant mechanism of *** is speculated that it may be related to carboxymethylated modifi cation.

关键词： Carboxymethyl polysaccharide Anti-depressant Catecholamine

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Critical review of biochar for the removal of emerging inorganic pollutants from wastewater

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Chinese chemical Letters 2025年第2期36卷 99-107页

作者： Chong Liu Nanthi Bolan Anushka Upamali Rajapaksha Hailong Wang Paramasivan Balasubramanian Pengyan Zhang Xuan Cuong Nguyen Fayong Li College of Water Resources and Architectural Engineering Tarim UniversityAlaer 843300China Department of Chemical&Materials Engineering University of AucklandAuckland 1010New Zealand UWA School of Agriculture and Environment The University of Western AustraliaPerthWestern Australia 6009Australia The UWA Institute of Agriculture The University of Western AustraliaPerthWestern Australia 6009Australia Ecosphere Resilience Research Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka Instrument Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China Guangdong Provincial Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China Department of Biotechnology&Medical Engineering National Institute of Technology RourkelaRourkela 796008India Centre for Advanced Chemistry Institute of Research and DevelopmentDuy Tan UniversityDa Nang 550000Vietnam Faculty of Environmental Chemical Engineering Duy Tan UniversityDa Nang 550000Vietnam

Current research primarily focuses on emerging organic pollutants,with limited attention to emerging inorganic pollutants (EIPs).However,due to advances in detection technology and the escalating environmental and health challenges posed by pollution,there is a growing interest in treating waters contaminated with *** paper explores biochar characteristics and modification methods,encompassing physical,chemical,and biological approaches for adsorbing *** offers a comprehensive review of research advancements in employing biochar for EIPs remediation in water,outlines the adsorption mechanisms of EIPs by biochar,and presents an environmental and economic *** can be concluded that using biochar for the adsorption of EIPs in wastewater exhibits promising ***,it is noteworthy that certain EIPs like Au(III),Rh(III),Ir(III),Ru(III),Os(III),Sc(III),and Y(III),have not been extensively investigated regarding their adsorption onto *** comprehensive review will catalyze further inquiry into the biochar-based adsorption of EIPs,addressing current research deficiencies and advancing the practical implementation of biochar as a potent substrate for EIP removal from wastewater streams.

关键词： Biochar Emerging inorganic pollutants Adsorption Metal ions Emerging pollutants Removal Emerging contaminants

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Nanosilica-polyacrylic acid superabsorbent hydrogel derived from fast concentration gradient method for remediation of Congo red wastewater

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Heliyon 2025年第4期11卷 e42799页

作者： Mohammadzadeh, Kazem Klishomi, Mohsen Sayfi Alikhani, Saeed Mahinroosta, Mostafa Research Laboratory of Inorganic Chemical Process Technologies School of Chemical Engineering Iran University of Science and Technology Narmak Tehran *** Iran Department of Chemical Engineering Brunel University London London United Kingdom Department of Energy Materials and Energy Research Center Iran

This study presents a novel composite superabsorbent hydrogel (SAH) synthesized from nanosilica and polyacrylic acid, demonstrating exceptional efficacy in removing Congo Red dye from wastewater. Utilizing a fast concentration gradient method, we achieved the synthesis of nanosilica with a high specific surface area of 380 m²/g, a total pore volume of 0.81 cm³/g, and a mean pore diameter of 17 nm. The modified nanosilica particles are well-dispersed, with around 83.5 % of the particles falling within the 20–35 nm size range. The resulting composite hydrogel exhibited a swelling ratio of 165 % after 135 min immersion in water. Remarkably, the hydrogel achieved over 98.5 % dye removal efficiency at a sorbent dosage of 3 g/L and a contact time of 1 h at pH 7. The maximum monolayer capacity obtained from the Langmuir isotherm was 555.56 mg/g. Additionally, it maintained a dye removal efficiency of 71.6 % after five regeneration cycles, highlighting its potential for sustainable wastewater treatment applications. The possible mechanisms for the removal of Congo Red dye involve electrostatic interactions and hydrogen bonding between the dye molecules and silica nanoparticles or hydrogel, facilitated by functional groups such as hydroxyl, carboxylic, and amino groups. This research not only advances the understanding of hydrogel properties but also introduces an innovative approach to enhance the performance of nanosilica-based adsorbents in environmental remediation, marking a significant contribution to the field of wastewater management. © 2025 The Authors

关键词： Dye removal Hydrogel Modification Nanosilica Superabsorbent

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A classification AI model to predict choking of vibrating screen based on DEM and machine learning

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Powder Technology 2025年 460卷

作者： Arifuzzaman, S.M. Dong, Kejun Zou, Ruiping Yu, Aibing Centre for Infrastructure Engineering School of Engineering Design and Built Environment Western Sydney University NSW2751 Australia ARC Research Hub for Smart Process Design and Control Department of Chemical Engineering Monash University ClaytonVIC3800 Australia

Screening is a complicated process for classifying granular materials according to size. Choking is a vital issue in screening. It may occur when the particle flow along a screen is too slow, but slow particle flow and long residence time are beneficial to sieving performance. Therefore, a model to judge whether choking happens is useful for finding optimal operating conditions. Here, a classification model to predict screen choking is proposed by combining DEM simulation and machine learning. The model can consider various key controlling variables for particle properties and operating conditions. Using the model, safe operation condition regions without choking can be identified. Then, combining the model with our previous machine learning based process model, we can design a screening process with the desired performance. The work also shows a way of using machine learning to predict critical phenomena in particle flow. © 2025 The Authors

关键词： Consolidation

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Tailoring interlayer spacing in MXene cathodes to boost the desalination performance of hybrid capacitive deionization systems

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Nano research 2023年第5期16卷 6039-6047页

作者： Bei Li Kang Sun Wenyu Xu Xiaojing Liu Ao Wang Steven Boles Bin Xu Haibo Hu Dongrui Yao Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation Institute of BotanyJiangsu Province and Chinese Academy of SciencesNanjing 210014China Institute of Chemical Industry of Forest Products Chinese Academy of ForestryNanjing 210042China School of Materials Science and Engineering Anhui UniversityHefei 230601China Department of Energy and Process Engineering Norwegian University of Science and TechnologyTrondheimNorway Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment of the People's Republic of ChinaNanjing 210042China

Capacitive deionization(CDI)is a promising technology to satisfy the global need for fresh water,since it can be both economical and *** two-dimensional transition metal carbides/nitrides(MXenes)exhibit great characteristics for use as CDI electrode materials,their tightly spaced layered structure renders intercalation *** this study,the interlayer distance of MXenes is precisely modulated by inserting different quantity of one-dimensional bacterial fibers(BC),forming freestanding MXene/BC composite *** the studied samples,MXene/BC-33%electrode with the interlayer spacing of 15.2Åcan achieve an optimized tradeoff among various desalination performance metrics and *** salt adsorption capacity(SAC),the average salt adsorption rate(ASAR),the energy normalized adsorbed salt(ENAS),and the thermodynamic energy efficiency(TEE)of the MXene/BC-33%electrode are improved by 24%,46%,13%,and 66%respectively compared with those of pure MXene *** the insertion of BC improves the ion diffusion pathways and facilitates the intercalation kinetics,the desalination performance decreases when the insertion amount of BC exceeds 40%.This is attributed to the overlarge resistance of the composite and the resulting increased energy *** study reveals the desalination performance tradeoffs of MXene-based electrodes with different interlayer distances and also sheds light on the fundamental ion storage mechanisms of intercalation materials in a CDI desalination system.

关键词： capacitive deionization MXene intercalation materials hybrid capacitive deionization cation intercalation

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Toward multichannel core-shell catalysts: Utilizing templating of silica sols with SBA-15 to achieve core-shell architecture in multichannel catalysts featuring a hierarchical porous structure

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Ceramics International 2025年第16期51卷 22480-22485页

作者： Pudlo, Wojciech Golkowska, Anna Prusik, Krystian Lach, Radoslaw Department of Chemical Engineering and Process Design Silesian University of Technology Strzody 7 Gliwice Poland Department of Drug Forms Technology Faculty of Pharmacy Wroclaw Medical University Borowska 211 Wroclaw Poland Institute of Materials Engineering University of Silesia in Katowice 75 Pulku Piechoty 1A Chorzow Poland Silesian Center for Education and Interdisciplinary Research University of Silesia in Katowice 75 Pulku Piechoty 1A Chorzow Poland Department of Ceramics and Refractories AGH University of Science and Technology in Krakow Al. Mickiewicza 30 Kraków Poland

We synthesized multichannel core-shell catalysts based on SBA-15 embedded in silica with a hierarchical porous structure. The addition of SBA-15 to silica sol changed the porous structure both at the macro- and mesoscale, contributing to the generation of additional phase separation, and thus forming a core-shell structure containing SBA-15 domains surrounded by a mesoporous silica film. These novel hybrid materials, similar to their precursors, i.e., hierarchical porous materials, can be potentially applied as carriers for catalysts, drugs, or enzymes, or as flow-through (bio)chemical microreactors. © 2025

关键词： Shells (structures)

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Enhanced Salt Removal Performance Using Nickel Hexacyanoferrate/Carbon Nanotubes as Flow Cathode in Asymmetric Flow Electrode Capacitive Deionization

SSRN

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SSRN 2023年

作者： Xu, Yang Duan, Feng Cao, Renqiang Chen, Chuang Ji, Wenyan Li, Yuping Cao, Hongbin National Engineering Research Center of Green Recycling for Strategic Metal Resources Chemistry & Chemical Engineering Data Center CAS Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Chinese Academy of Science Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China

One of the most widely used CDI processes is flow electrode capacitive deionization (FCDI), which is preferred over conventional CDI with static electrode due to its continuous treatment of high-salt wastewater and ability to scale production. However, the discontinuous charge transport network in flow electrodes restricts the improvement of desalination performance. In this study, we prepared nickel hexacyanoferrate and carbon nanotubes composites (NiHCF@CNTs) by a simple ball-milling method and constructed an asymmetric FCDI (AFCDI) system using NiHCF@CNTs and AC as flow cathode and anode, respectively. Then the desalination performance of AFCDI was examined and compared with that of symmetric FCDI system using AC as both flow electrodes under different conditions. The stability was also investigated by a 20-cycle operation test. It was found that AFCDI system showed higher average salt removal rate and lower energy consumption compared with FCDI, owing to the enhancement of charge transport resulting from the couple of high specific capacitance of NiHCF and excellent electrical conductivity of CNTs. Moreover, AFCDI system has stable desalination performance in continuous operation. These results indicate that compositing Faradic materials and CNTs is an effective strategy for improving desalination performance of FCDI. © 2023, The Authors. All rights reserved.

关键词： Carbon nanotubes

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