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Highly selective and stable hydrogenation of heavy aromatic-naphthalene over transition metal phosphides

Science China Chemistry 2015年第4期58卷 738-746页

作者： Muhammad Usman Dan Li Chunshan Li Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex SystemsInstitute of Process Engineering University of Chinese Academy of Sciences

The present study reports a highly selective and stable catalytic approach for producing tetralin, an important chemical, solvent, and H2 storage material. Transition metal phosphides （MOP, Ni2P, Co2P, and Fe2P） were prepared by wet impregnation and temperature-programmed reduction and characterized by X-ray diffraction （XRD）, energy dispersive X-ray spectroscopy （EDX）, EDX mapping, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, brunauer-emmett- teller （BET）, temperature-programmed desorption of ammonia （NH3-TPD）, and fourier transform infrared spectroscopy of pyridine （pyridine-FTIR）. Of all the transition metal phosphides MoP was formed at a lower reduction temperature, which resuited in smaller particle size that enhanced the overall surface area of the catalyst. The existence of weak, moderate, and Lewis acidic sites over MoP were responsible for its high tetralin selectivity （90%） and stability during the 100 h reaction on-stream in a fixed-bed reactor.

关键词： coal tar naphthalene transition metal phosphides selective hydrogenation tetralin

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STEADY-STATE OPERATION ANALYSIS OF AN IDEAL HEAT INTEGRATED DISTILLATION COLUMN

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Chinese Journal of Chemical engineering 1997年第4期5卷 43-54页

作者：黄克谨钱积新战德志中岩勝高松武一郎 Institute of Industrial Process Control Zhejiang University Department of Chemical Process Automation Qingdao Institute of Chemical Engineering Department of Chemical Systems National Institute of Materials and Chemical Research Institute of Industrial Technology Kansai University

A systematic approach for the steady-state operation analysis of chemical processes is *** method affords the possibility of taking operation resilience into consideration during thestage of process *** may serve the designer as an efficient means for the initial screening ofalternative design *** ideal heat integrated distillation column(HIDiC),without any reboileror condenser attached,is studied throughout this *** has been found that among the various va-riables concerned with the ideal HIDiC,feed thermal condition appears to be the only factor exertingsignificant influences on the interaction between the top and the bottom control *** is expected when the feed thermal condition approaches *** number of stages andheat transfer rate are essential to the system ability of disturbance ***,more stagesand higher heat transfer rate ought to be ***,too many stages and higher heat transfer ratemay increase the load of the

关键词： Distillation model identification steady-state design operation resilience process control

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ARTIFICIAL-INTELLIGENCE IN THE DEVELOPMENT AND DESIGN OF BIOCHEMICAL processES

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TRENDS IN BIOTECHNOLOGY 1986年第9期4卷 241-249页

作者： STEPHANOPOULOS, G STEPHANOPOULOS, G Laboratory for Intelligent Systems in Process Engineering Biotechnology Process Engineering Center Massachusetts Institute of Technology Cambridge MA 02139 USA

This article outlines the use of artificial intelligence in three areas of biotechnology: (a) exploration of new production routes for various bioproducts; (b) design of mammalian cell biofermentors; and (c) synthesis of downstream processing schemes for the separation and purification of proteins. Until recently, all of these areas have been ‘knowledge intensive’, driven by the incisive expertise of scientists and engineers, and quite resistant to analytic and rigorous mathematical formulations and solutions. Here we describe the ‘prototype intelligent system’ used in the above three areas, and attempt simple projections on the use of artificial intelligence in biotechnology.

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Green synthesis of magnetic type Zeolites 4A as catalyst for the elimination of quinoline yellow by the Fenton process: Optimization and kinetic investigation

Hybrid Advances

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Hybrid Advances 2025年 9卷

作者： Foko, Roland Urselin Noumsi Fotsop, Cyrille Ghislain Tchuifon, Donald Raoul Tchuifon Banenzoué, Charles Azebaze, Anatole Guy Blaise Department of Chemistry Faculty of Science University of Douala PO Box: 24157 Douala Cameroon Institute of Chemistry Faculty of Process and Systems Engineering Universitat Splatz 2 Magdeburg 39106 Germany Department of Process Engineering Laboratory of Chemical Engineering and industrial bio-processes National Higher Polytechnic School of Douala University of Douala P.O. Box 2701 Douala Cameroon Department of Chemistry Research Unit of Noxious Chemistry and Environmental Engineering Faculty of Science University of Dschang P.O. Box 67 Dschang Cameroon

This work describes the hydrothermal synthesis and characterization of zeolite 4A (Zeo-4A) and magnetite zeolite (Zeo-4A@Fe3O4) from Cameroonian raw kaolin. The study also explores the efficiency of Zeo-4A@Fe3O4 for t... 详细信息

This work describes the hydrothermal synthesis and characterization of zeolite 4A (Zeo-4A) and magnetite zeolite (Zeo-4A@Fe₃O₄) from Cameroonian raw kaolin. The study also explores the efficiency of Zeo-4A@Fe₃O₄ for the removal of quinoline yellow (E104) via Fenton process. XRD, FTIR, SEM, EDX, NMR-MAS and TGA-DSC characterizations show that Zeo-4A is crystalline with cubic morphology, while Zeo-4A@Fe₃O₄ exhibits a bonding interaction between zeolite and Fe₃O₄ nanoparticle leading to morphological structural changes. The degradation of quinoline yellow by heterogeneous Fenton process was carried out by varying several parameters, namely solution pH (3–7), H₂O₂ concentration (0.5–1.5 mol/L), quinoline yellow concentration (50–100 mg/L), and catalyst mass (50–100 mg). The results of catalytic performance tests reveal that the degradation efficiency of synthetic Zeo-4A, Zeo-4A@Fe₃O₄ and Fe₃O₄ were 1.71 %, 93.60 % and 92.65 %, respectively, after 60 min. Confirmatory tests were carried out by response surface methodology based on the Box-Behnken design, and a degradation rate of 98.81 % was obtained under optimum conditions of pH 3.84, 50.14 mg/L, 100 mg, and 1.5 g/L;which is well in line with the model predictions. A significant quadratic regression model R² = 91.35 % and the adjusted coefficient of determination value (adjusted R² = 82.04 %) were observed using the analysis of the variance. The study of catalyst recovery and reusability shows that the catalysts remain stable with a degradation rate greater than 66 % after five cycles. The kinetics results show that the degradation of E104 follows first and second order kinetic models, influenced by pH and catalyst mass, with optimum efficiency at pH 3. The characterization results of the material after degradation show that it maintains its stru

关键词： Degradation Fenton process Quinoline yellow Zeolite 4A

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Fabrication of a low insertion loss and high productivity FI/FO device based on the different core couple method and tapered corrosion method

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Optics Letters 2025年第11期50卷 3497-3500页

作者： Li, Yuxin Wang, Qianjin Wu, Yupeng Yin, Zhiyuan Zhou, Xue Yan, Xin Cheng, Tonglei State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China Foshan Graduate School of Innovation Northeastern University Guangdong Foshan528311 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao066004 China

Two innovative methods, the different core couple (DC) method and the tapered corrosion (T-C) method, are proposed to improve traditional fiber bundle corrosion techniques for fabricating fan-in/fan-out (FI/FO) devices. The D-C method utilizes fibers with varying core diameters to facilitate light transmission from smaller to larger diameters, enhancing the fault tolerance of a fiber core structure on the end-face of FI/FO devices and minimizing optical signal leakage at the multiplexer joint, thereby reducing insertion loss (IL). Taper-cut and fusion-splicing techniques ensure the compatibility of the device with standard optical communication systems. The T-C method presents the idea of tapered corrosion fibers applied to FI/FO device fabrication, significantly enhancing production efficiency through a simple, repeatable, and cost-effective process. The above two methods were used to fabricate the corresponding FI/FO device for four-core single-mode fibers (4C-MCF), which are employed for signal multiplexing and demultiplexing. The device has a low average IL value of less than 0.5 dB, with cross talk lower than −60 dB, meeting the requirements for fiber-optic communication. This work provides two techniques for the fabrication of FI/FO device in multi-core fiber (MCF) communication systems, which can be expected to promote the innovation and development of space division multiplexing (SDM) technology. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Fiber to the x

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Steps towards steady-state simulation on MIMD machines: Solving almost block diagonal linear systems

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COMPUTERS & CHEMICAL engineering 1997年第7期21卷 691-701页

作者： Paloschi, JR Centre for Process Systems Engineering Imperial College London London U.K.

We study, in this paper, the feasibility of using preconditioned iterative methods to solve linear systems on MIMD (multiple instruction multiple data) machines when solving steady-state simulation problems. We show that, provided a good parallel preconditioner is available, the proposals in this paper give very good parallel performance. Our proposals are directly applicable to almost block diagonal linear systems, but can be extended to more general flowsheeting problems (Paloschi, 1996). This will be the subject of a future paper. A preconditioning strategy blending an incomplete LU decomposition with a polynomial preconditioner is proposed and tested with the iterative method GMRES of Saad and Schultz (1986). A parallel implementation is tested on two MIMD machines, a Fujitsu AP1000 with 128 processors and a cluster of workstations with PVM (Parallel Virtual Machine) (Geist et al., 1994). Two examples are used, a simple model of a distillation column using Antoine coefficients and the discretization of a PDE. The second example allows the variation in the size of the problem and results are presented for up to 65 536 equations on the AP1000 and 262 144 equations on the cluster. Almost perfect efficiency is observed when solving a problem of size 65 536 using 32 processors on the AP1000 (and size 16 384 using 16). Very good speed-ups also are obtained on the cluster Df workstations (a speed-up of 15.3 using 16 processors) when solving a problem of size 65 536. The results on the cluster are presented for different load conditions on the network. (C) 1997 Elsevier Science Ltd.

关键词： Parallel processing systems

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Quantum chemical descriptors based QSAR modeling of neodymium carboxylate catalysts for coordination polymerization of isoprene

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Chinese Journal of Chemical engineering 2020年第7期28卷 1805-1808页

作者： Shuguang Xiang Jiye Wang Institute of Process Systems Engineering Qingdao University of Science&TechnologyQingdao 266042China

Based on the quantum chemical descriptors and the activities for isoprene polymerization of 12 neodymium carboxylates obtained by authors’earlier work,statistical analysis of data was made and a QSAR model correlating the quantum chemical descriptors and the activity was built with the partial least square(PLS)*** model is:A=51602εHOMO+6σ+12546,which indicates that the catalytic activity A is positively correlated with the HOMO energyεHOMOand the ligand polarizabilityσ,with the contribution ofσbeing larger,εHOMO *** model’s coefficient of determination r^2=0.96 and that of cross validation q^2=0.94,both being close to 1,which means that its quality is well and its predictive power is *** of the modeling process and the resulted QSAR model,together with the interpretation of the model’s mechanism,also shows that the model obtained from this study is valid and *** to the QSAR model,the mechanism of catalyst activity can be interpreted as that neodymium carboxylates with higher HOMO energy and larger ligand polarizability are easier to react with the co-catalysts so as to produce more active and stable centers of catalyst,resulting in a higher activity.

关键词： Neodymium carboxylate QSAR modeling Isoprene coordination polymerization Catalyst

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REMOVAL OF RADIOCESIUM FROM SIMULATED ALKALINE SALT-LOADED RADWASTE SOLUTION USING POTASSIUM COBALT(II) HEXACYANOFERRATE(II)

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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS 1995年第3期199卷 183-190页

作者： SAMANTA, SK THOMAS, MK THEYYUNNI, TK Process Engineering and Systems Development Division Bhabna Atomic Research Centre Bombay India

The inorganic sorbent potassium cobalt(II) hexacyanoferrate(II) was tested for removal of radiocesium from alkaline salt solutions that are typical of intermediate level radioactive wastes generated at spent fuel repr... 详细信息

关键词： Nuclear fuel reprocessing

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Robust Dynamic Optimization of a Semi-Batch Emulsion Polymerization process with Parametric Uncertainties-A Heuristic Approach -

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IFAC-PapersOnLine 2016年第7期49卷 907-912页

作者： Puschke, Jennifer Mitsos, Alexander Aachener Verfahrenstechnik-Process Systems Engineering RWTH Aachen University Germany

Optimized exothermic semi-batch emulsion polymerization typically exhibits active arcs of the constraints for the reactor temperature. Given parametric uncertainties in the process model, this might lead to constraint violations which are a safety concern. Therefore, an approach is investigated, such that constraint violations are less likely and is hence robust feasible. The two-model approach is presented as an approximate solution. Therein, two models, the nominal and a worst-case model are optimized simultaneously. Because of the challenges in defining the worst-case, a heuristic method is presented to define the worst-case parameter and its parameter value. The results of the process optimization with the two-model approach are compared with the results of the optimization with the nominal model solely. In addition the feasibility of both optimization strategies is compared by simulating hundred different scenarios with random parameter values from the uncertainty set. The presented approximation does not guarantee robust feasibility, but path constraint violations are less likely due to the introduced conservatism compared to the original optimization. © 2016

关键词： Optimization Emulsification Emulsion polymerization Heuristic methods Optimal control systems Uncertainty analysis Dynamic optimization Optimal control problem Optimization strategy Parameter uncertainty Parametric uncertainties Reactor temperatures Semi batch emulsion polymerization Uncertain dynamic systems

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Reaction mechanism and metal ion transformation in photocatalytic ozonation of phenol and oxalic acid with Ag^+/TiO_2

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Journal of Environmental Sciences 2014年第3期26卷 662-672页

作者： Yingying Chen Yongbing Xie Jun Yang Hongbin Cao Yi Zhang National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences

Photocatalytic ozonation of phenol and oxalic acid （OA） was conducted with a Ag^＋/TiO2 catalyst and different pathways were found for the degradation of different compounds. Ag^＋ greatly promoted the photocatalytic degradation of contaminants due to its role as an electron scavenger. It also accelerated the removal rate of OA in ozonation and the simultaneous process for its complex reaction with oxalate. Phenol could be degraded both in direct ozonation and photolysis, but the TOC removal rates were much higher in the simultaneous processes due to the oxidation of hydroxyl radicals resulting from synergetic effects. The sequence of photo-illumination and ozone exposure in the combined process showed quite different effects in phenol degradation and TOC removal. The synergetic effects in different combined processes were found to be highly related to the properties of the target pollutants. The color change of the solution and TEM result confirmed that Ag＋ was easily reduced and deposited on the surface of Tit2 under photo-illumination, and dissolved again into solution in the presence of ozone. This simple cycle of enrichment and distribution of Ag^＋ can greatly benefit the design of advanced oxidation processes, in which the sequences of ozone and photo-illumination can be varied according to the needs for catalyst recycling and the different properties of pollutants.

关键词： photocatalytic ozonation phenoloxalic acid Ag＋/TiO2

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