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SSRN 2023年

作者： Zhong, Zaixi Zhang, Qi Ji, YangMei Liu, JaLong Luo, GangGang Wang, XinXin Tian, ShuoShuo Zhang, Zhao State Environmental Protection Key Laboratory of Eco-Industry Northeastern University Liaoning Shenyang110819 China Department of Thermal Engineering School of Metallurgy Northeastern University Liaoning Shenyang110819 China Liaoning Province Engineering Research Center for Energy Saving and Green Low Carbon Technologies in Process Industry Liaoning Shenyang110819 China

In the context of carbon neutrality, maximizing energy efficiency has become a key research direction for energy saving and carbon reduction in iron and steel industry, as the main energy consuming equipment, blast furnaces (BF) account for over 60% of the energy consumption in BF-BOF process, highlighting the importance of energy saving and carbon reduction in BF. This paper analyzed the thermodynamic state inside the BF from the perspective of material and energy flow, and find the directions for energy saving and carbon reduction of the BF ironmaking process. For this aim, a detailed material and energy flow model for the BF is established in this study. Based on the model, the insight effects of the hot air parameters, direct reduction degree, pellet ratio and block ore ratio on the change in thermodynamic state are analyzed. Based on the results, 7 scenarios are set to analyze the direction of energy saving and carbon reduction of the BF ironmaking process. The result shows the Case5 have the highest energy saving potential of 1.042kgce/t-HM (hot metal) and the carbon saving potential of 16.66kg/t-HM, which mean that reducing the direct reduction degree is the most effective way to energy saving and carbon reduction of the BF ironmaking process. However, in the Case2, Case6, and Case7, the energy saving potentials are opposite to carbon saving potentials, which means that energy saving may not lead to the carbon reduction. In addition, the Case5 has the lowest energy consumption of 525.9kgce/t-HM and carbon emission of 1368.47kg/t-HM, while the Case2 have the highest energy consumption of 533.3kgce/t-HM and carbon emission of 1389.55 kg/t-HM. The energy structure analysis shows that reducing the proportion of coke ratio can effectively reduce energy consumption and carbon emissions of the BF ironmaking process. © 2023, The Authors. All rights reserved.

关键词： Blast furnaces

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Physics-informed dynamic mode decomposition for short-term and long-term prediction of gas-solid flows

arXiv

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arXiv 2023年

作者： Li, Dandan Zhao, Bidan Lu, Shuai Wang, Junwu State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences P. O. Box 353 Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China

Integration of physics principles with data-driven methods has attracted great attention in recent few years. In this study, a physics-informed dynamic mode decomposition (piDMD) method, where the mass conservation law is integrated with a purely data-driven DMD method, is developed for fast prediction of the spatiotemporal dynamics of solid volume fraction distribution in bubbling fluidized beds. Assessment of the prediction ability using both piDMD and DMD is performed using the CFD-DEM results as the benchmark: Both DMD and piDMD can predict the short-term behaviour of solid volume fraction reasonably well, but piDMD outperforms the DMD in both qualitative and quantitative comparisons;With respect to their long-term ability, the piDMD-based prediction of the instantaneous solid volume fraction distributions is qualitatively correct although the accuracy needs to be improved, and the predicted time-averaged radial and axial profiles are satisfactory;Whereas the DMD-based prediction of instantaneous snapshots and time-averaged results is completely nonphysical. Present study provides a fast and relatively accurate method for predicting the hydrodynamics of gas-solid flows. Copyright © 2023, The Authors. All rights reserved.

关键词： Dynamic mode decomposition

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Positional assembly of multi-enzyme cascade reaction in polyelectrolyte doped microcapsule through electrospray and layer-by-layer assembly

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Synthetic and Systems Biotechnology 2020年第3期5卷 206-213页

作者： Shiyi Che Jie Wang Xiaoyuan Ji Zhiguo Su Shaomin Wang Songping Zhang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences No.19 Yuquan RoadShijingshan DistrictBeijing100049China College of Chemistry Zhengzhou UniversityZhengzhou450001China

Polyelectrolyte-doped microcapsules(PDM)was fabricated by coaxial electrospray of a mixture of glycerol and water containing 10 mg/mL cationic polyelectrolyte poly(allylamine hydrochloride)(PAH)fed as the core phase solution,and a N,N-dimethylacetylamide solution of 10 wt%polyurethane fed as the shell phase *** system involving Candida Antarctica lipase B(CALB),glucose oxidase(GOD),and horseradish peroxidase(HRP)for cascade reaction was assembled in the PDM at three different places,namely,surface,shell,and *** of enzyme inside aqueous lumen of the PDM was realized by in situ encapsulation through adding the enzyme in the core-phase solution for coaxial *** ion-pairing of enzyme with cationic surfactant CTAB,an organic soluble enzyme-CTAB complex was prepared,so that in situ embedding of enzyme in the shell of the PDM was realized by adding it into the shell phase *** attachment of enzymes was achieved by layer-by-layer(LbL)technology,which is based on the ion-exchange interactions between oppositely charged enzymes and PAH that was doped in *** enzyme-decorated microcapsule was then studied as a microbioreactor,in which 1-Oxododecyla-α-glucopyranoside was converted by CALB to glucose,which was oxidised by GOD to gluconolactone in a second *** hydrogen peroxide produced was then used by HRP to oxidize ABTS to form coloured radical cation ABTS•+for activity *** successful fabrication of the PDM and precise localization of enzymes in the PDM by different strategies were fully *** varying the immobilization strategy,totally six PDM bioreactors with three enzymes precisely positional assembled in different strategies were constructed and their activities for the cascade reaction were investigated and *** PDM micro-bioreactor prepared by novel electrospray technologies provide a smart platform for positional assembly of multi-enzyme cascade reaction in a precise and well-controlle

关键词： Coaxial electrospray Microcapsule Multi-enzyme Cascade reaction Positional assembly Layer-by-layer assembly

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GPU-Based in Situ Visualization for Large-Scale Discrete Element Simulations

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Wireless Communications and Mobile Computing 2022年第1期2022卷

作者： Qin, Pengfei Xia, Zhaojie Gao, Guoxian Tao, Xiaofang Guo, Li State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China

The result of discrete element simulations has tens of thousands of time frames and hundreds of billions of interacting particles in each frame, which may lead to very large data sets. The existing postprocessing visualization technology cannot deal with such large-scale data, which will bring a negative impact to the simulation, affect the simulation speed, and make it difficult to realize the runtime steering. In this work, an attempt has been made to optimize visualization methods by directly accessing DEM simulation results, data exchanging straightly between GPUs, and accelerating pixel composition by GPU. The key feature of this work is that the entire process from DEM simulation to graphical rendering and image composition is done inside the same GPU. © 2022 Pengfei Qin et al.

关键词： Graphics processing unit

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Preparation of double-emulsion-templated microspheres with controllable porous structures by premix membrane emulsification

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Particuology 2019年第3期17卷 22-27页

作者： Xiangming Na Weiqing Zhou Tong Li Ding Hong Juan Li Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

A scalable and versatile strategy was developed for the fabrication of uniform polymeric microspheres with controllable interconnected porous structures. Uniform water-in-oil-in-water emulsions with linear poly(methyl methacrylate-glycidyl methacrylate) in the oil phase were generated by two-step premix membrane emulsification and used for constructing the microspheres. During the emulsion solidification process, internal water droplets were packed densely together, forming a thin oil film between the internal and external water phases. After solvent diffusion, the thin film can be ruptured and pores can be templated from the internal water droplets to form interconnected porous structures. Membranes with various pore sizes were obtained. The osmotic pressure and Laplace pressure balance were used to control the porosity and pore size precisely. The proposed method enables the fabrication of functional polymeric microspheres with uniform and controllable porous structures and particle sizes. This improves their performance and broadens the scope of their applications, especially in chromatographic separation.

关键词： Double emulsion Membrane emulsification Porous microsphere Uniform structure

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Electrolyte for lithium protection: From liquid to solid

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green Energy & Environment 2019年第4期4卷 360-374页

作者： Xiaohong Wu Kecheng Pan Mengmin Jia Yufei Ren Hongyan He Lan Zhang Suojiang Zhang CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering&Technology Tianjin UniversityTianjin 300072China

Lithium battery with high energy density and enhanced safety is undoubtedly the ideal choice for consumer electronics and electric *** anode such as lithium has been considered as the most effective way to enhance the energy density as it provides ultra-high theoretical capacity and the lowest redox ***,due to the low coulombic efficiency as well as safety concerns originated from dendrite issue of lithium,its further commercial utilization is *** growth is a common phenomenon in metal electrodeposition while the plating process of Li is more complicated than other metals for its high reactivity *** a matter of fact,the Li plating process is accompanied with the generation of solid electrolyte interphase(SEI)in which the electrolyte plays a vital *** this paper,recent advances of electrolytes for Li protect application are reviewed,from liquid to gel polymer and solid state,on which we find that although tremendous progress has been accomplished,there are still great challenges before Li metal anode could be commercially used.

关键词： Lithium battery Dendrite Lithium protection Electrolyte SEI

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Special Issue for Zeolite Catalysis

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Chinese Journal of Structural Chemistry 2024年第4期43卷 1-1页

作者： Anmin Zheng Xiangju Meng Hao Xu Wei Chen Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhanHubei430071China Zhejiang University HangzhouChina State Key Laboratory of Molecular&Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200062China Ghent University Technologiepark 46Zwijnaarde 9052Belgium

As the most successful heterogeneous catalyst,zeolite has found widespread application in methanol to olefins,alkane dehydrogenation,CO_(2)hydrogenation,syngas conversion,and various other *** provide a comprehensive understanding of the structure-performance relationship,a series of fundamental papers have been published in this special issue,covering topics ranging from zeolite synthesis to structural and acidic characterization,and catalytic reactions.

关键词： processes. zeolite methanol

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Correction: Coordination-assembled myricetin nanoarchitectonics for sustainably scavenging free radicals

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Beilstein journal of nanotechnology 2022年 13卷 570-571页

作者： Xiaoyan Ma Haoning Gong Kenji Ogino Xuehai Yan Ruirui Xing Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Tokyo Japan. State Key Laboratory of Biochemical Engineering Chinese Academy of Sciences Institute of Process Engineering Beijing P. R. China. School of Chemical Engineering University of Chinese Academy of Sciences Beijing P. R. China.

[This corrects the article DOI: 10.3762/bjnano.13.23.].

关键词： antioxidant co-assembly glutathione myricetin nanoarchitectonics

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A Redox-Active Phenothiazine-based Pd2L4-Type Coordination Cage and Its Isolable Crystalline Polyradical Cations

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Angewandte Chemie 2024年第36期136卷

作者： Dr. Bin Huang Manfei Zhou Qiong-Yan Hong Meng-Xiang Wu Prof. Xiao-Li Zhao Prof. Lin Xu Prof. En-Qing Gao Prof. Hai-Bo Yang Prof. Xueliang Shi State Key Laboratory of Petroleum Molecular & Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China

Polyradical cages are of great interest because they show very fascinating physical and chemical properties, but many challenges remain, especially for their synthesis and characterization. Herein, we present the synthesis of a polyradical cation cage 1 4 . + through post-synthetic oxidation of a redox-active phenothiazine-based Pd 2 L 4 -type coordination cage 1 . It′s worth noting that 1 exhibits excellent reversible electrochemical and chemical redox activity due to the introduction of a bulky 3,5-di- tert -butyl-4-methoxyphenyl substituent. The generation of 1 4 . + through reversible electrochemical oxidation is investigated by in situ UV/Vis-NIR and EPR spectroelectrochemistry. Meanwhile, chemical oxidation of 1 can also produce 1 4 . + which can be reversibly reduced back to the original cage 1 , and the process is monitored by EPR and NMR spectroscopies. Eventually, we succeed in the isolation and single crystal X-ray diffraction analysis of 1 4 . + , whose electronic structure and conformation are distinct to original 1 . The magnetic susceptibility measurements indicate the predominantly antiferromagnetic interactions between the four phenothiazine radical cations in 1 4 . + . We believe that our study including the facile synthesis methodology and in situ spectroelectrochemistry will shed some light on the synthesis and characterization of novel polyradical systems, opening more perspectives for developing functional supramolecular cages.

关键词： Coordination cages Self-assembly Redox activity In situ spectroelectrochemistry Organic radicals

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Role of Thermolysin in Catalytic-Controlled Self-Assembly of Fmoc-Dipeptides

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CCS Chemistry 2020年第4期2卷 317-328页

作者： Meiyue Wang Qiansen Zhang Honglei Jian Shijie Liu Jieling Li Anhe Wang Qianqian Dong Peng Ren Xin Li Shuo Bai State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190 School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049 Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai 200241.

In recent years,short peptide self-assembled materials,prepared under the control of the thermolysin catalyst,have been investigated extensively and shown to acquire various morphologies and functions as building blocks for a wide range of biomaterials and device ***,the role played by thermolysin in this enzymatically triggered peptide self-assembly is still ***,we designed a series of Fmoc-dipeptide amphiphiles to explore the catalytic role of thermolysin.

关键词： peptide self-assembly thermolysin sequence catalytic efficiency

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