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Synthesis methods and powder quality of titanium monocarbide

Chinese Journal of Chemical engineering 2024年第8期72卷 10-18页

作者： Maoqiao Xiang Wenjun Ding Qinghua Dong Qingshan Zhu State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

Titanium monocarbide(TiC),which is the most stable titanium-based carbide,has attracted considerable interest in the fields of energy,catalysis,and structural materials due to its excellent *** of high-quality TiC powders with low cost and high efficiency is crucial for industrial applications;however major challenges face its ***,the methods for synthesizing TiC powders based on a reaction system are *** analysis is focused on the underlying mechanisms by which synthesis methods affect the quality of ***,strategies for improving the synthesis of highquality powders are analyzed from the perspective of enhancing heat and mass transfer ***,the critical issues,challenges,and development trends of the synthesis technology and application of high-quality TiC powder are discussed.

关键词： Titanium carbide Synthesis methods Reaction engineering Reaction kinetics Powder technology

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Multi-functional Hollow Structures for Intelligent Drug Delivery

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Chemical Research in Chinese Universities 2024年第3期40卷 394-412页

作者： HOU Ping YANG Nailiang WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing 100049P.R.China

Multi-fountional hollow structures have emerged as promising platforms for intelligent drug delivery due to their unique properties,such as high loading capacities and programmed drug *** particular,hollow multishell structures(HoMSs)with multilevel shell and space can regulate the molecular-level interaction between drugs and materials,so as to achieve the temporal-spatial order and sequential release of *** anisotropic hollow structures can control the drug diffusion process by inducing the macroscopic interface flow through autonomous movement,realizing the targeted drug transport and *** this paper,a key focus will be HoMSs with their temporal-ordered architectures and anisotropic hollow carriers with directional *** synthesis mechanisms,structure-property relationships,smartly programmed drug delivery and biomedical applications will be discussed,providing insights into designing next-generation intelligent drug carriers.

关键词： Hollow multishell structure Anisotropic hollow structure Intelligent drug carrier Temporal-spatial order Directional movement

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Ionic-microenvironment stabilizes the disulfide engineered lysine decarboxylase for efficient cadaverine production

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green Chemical engineering 2023年第2期4卷 224-232页

作者： Zhuang Li Yaju Xue Xiuling Ji Yuhong Huang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou450000China Zhongke Langfang Institute of Process Engineering Langfang065001China

Cadaverine is the key monomer for the synthesis of nylon *** and alkaline stable lysine decarboxylases are highly desirable for cadaverine production as the reaction pH increasing from 6.3 to ***,the most studied lysine decarboxylase CadA(***)lost almost all activity at pH 8.0,which is the foremost challenge for the industrial-cadaverine *** this study,we first found that the Na^(+)-microenvironment significantly improved the alkaline stability of the disulfide engineered lysine decarboxylaseΔLdcEt3(P233C/L628C)(half-life 362 h),compared to the conventional buffer(half-life 0.66 h)at pH ***,the whole-cell conversion efficiency of the industrial-grade L-lysine withΔLdcEt3 could reach up to 99%in 2 h in the ***-mental investigation and molecular dynamics confirmed that Na^(+)-microenvironment could improve active-aggregation state and affect secondary structure ofΔ***,Na^(+)-microenvironment stabilizesΔLdcEt3 providing a great potential industrial application for high-level cadaverine production.

关键词： Na^(+)-microenvironment Lysine decarboxylase ΔLdcEt3 Alkaline stability Cadaverine

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Selective oxidation using in-situ generated hydrogen peroxide over titanosilicates

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Chinese Journal of Structural Chemistry 2024年第6期43卷 12-14页

作者： Zhipeng Wan Hao Xu Peng Wu State Key Laboratory of Petroleum Molecular&Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular Engineering East China Normal UniversityShanghai200062China Institute of Eco-Chongming Shanghai202162China

Titanosilicates are a class of heteroatom-containing zeolitic materials with tetrahedrally coordinated Ti^(4+)ions incorporated into crystalline zeolite frameworks,with TS-1,Ti-MWW and Ti-MOR as representative and attractive selective oxidation *** liquid-phase oxidations of a variety of substrates such as olefins and ketones with the green oxidant of H_(2)O_(2)over titanosilicates under mild conditions have attracted considerable research interests in the clean production of fine and bulk chemicals,among which propylene epoxidation and cyclohexanone ammoximation have been industrialized[1].

关键词： silicate zeolite propylene

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Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria

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Rare Metals 2022年第12期41卷 4279-4288页

作者： He-Yun Sun Qiao-Yi Tan Yan Jia Rong-Bo Shu Shui-Ping Zhong Ren-Man Ruan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of ScienceBejing 100190China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of ScienceBejing 100190China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of ScienceBeijing 100190China Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological SciencesChengdu 610041China State Key Laboratory of Gold Extraction Zijin Mining Group Co.Ltd.Shanghang 364200China

Comparisons on the bioleaching and sterile oxidation of pyrite were performed at controlled redox potential of 900 mV(***) and different temperatures of 30 and 60℃.For sterile experiments,the redox potential of irrigation solution was controlled by adding hydrogen peroxide solution(15 wt%),while the redox potential of irrigation solution for bioleaching was elevated by flowing through the packed bed in which bacteria were activated and *** rate of pyrite bioleaching is faster than that of sterile oxidation at temperature of 30℃.The reason is that the potential gradient of leaching solution in bioleaching column is much smaller than that in sterile *** redox potentials of irrigation solution and leaching solution are similar for bioleaching;however,the redox potential difference of irrigation solution and leaching solution for sterile oxidation is about 150 *** temperature increases to 60℃ for sterile oxidation,the rate of pyrite leaching is faster than that of bioleaching at temperature of 30℃,even though the redox potential gradient of leaching solution is *** mineralogy analyses of pyrite residue were performed by scanning electron microscopy-energy-dispersive spectroscopy(SEM-EDS),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS) *** results confirm that pyrite oxidation might only occur at specific sites with high surface energy on surface and obeys the "indirect mechanism" whether there are bacteria or *** pyrite oxidation rate is not inhibited by inert sulfur on residue surface at elevated redox *** to the conclusions,the way to accelerate pyrite oxidation is proposed.

关键词： Pyrite column leaching Temperature Controlled redox potential Bacteria

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Study on ionic liquids based novel method for separation and purification of silkworm pupa protein

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Chinese Chemical Letters 2023年第1期34卷 382-387页

作者： Wen Zhang Shaoqi Yang Baozeng Ren Xingmei Lu Cai Jia Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou 450000China Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs College of Mechanical&Electrical EngineeringHenan Agricultural UniversityZhengzhou 450002China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China

Silkworm pupa protein(SPP)that obtained by traditional method usually had a high fat content,which would impose restrictions on the further use of ***,various functionalized ionic liquids(ILs)were used to extract SPP from silkworm pupae,the structure-performance relationship of ILs with their SPP separation performance were explored at the same *** research showed that the maximum extraction yield of SPP was up to 62.6%with less than 0.5%low fat content by using 1-ethyl-3-methylimidazolium chloride([Emim]Cl),when the dissolution experiment was conducted at 90°C for 24 h with ethanol bath as the regeneration *** with the structure of raw material,the regenerated SPP maintained the native protein ***,all regenerated SPP showed a decreased crystallinity,which also exhibited decreased fraction of theα-helix comparing to thatβ-sheet united with coil random structures.

关键词： Silkworm pupa protein Ionic liquids Protein backbone Silkworm pupa Separation

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Dynamic apertures with diffusion-regulatory functionality in soft porous crystals:A key to solving the century puzzle on isotopologues separation

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Nano Research 2023年第2期16卷 3254-3255页

作者： Yanhong Li Jianze Xiao Yangyang Guo Ning Han Fangli Yuan Yunfa Chen Ming-Shui Yao State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100049China Key Laboratory of Science and Technology on Particle Materials Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The separation of water isotopologues has been a“century-old”challenge,also known as“the Holy Grail”in separation *** water(D2O)is a stable non-radioactive water isotopologue that plays a critical role in scientific research,military,nuclear energy,and medical *** water was first reported in 1931 when *** discovered D2 and D2O,for which he was awarded the Nobel Prize in Chemistry in *** in 1933,*** et *** 0.5μL of heavy water at a concentration of around 65.7%when electrolyzing 10 liters of *** 1935,the world's first heavy water plant was built in Norway,producing 2 tons of heavy water by electrolysis,but the separation factor was merely 1.05,which was extremely *** 1943,the first heavy water plant employing the distillation method was built in the United states.

关键词： separation porous distillation

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Hollow Multishelled Structural Li-rich Cathode with AI Doping Enabling Capacity and Voltage Stabled Li-ion Batteries

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高等学校化学研究（英文版） 2023年第4期39卷 630-635页

作者： ZHAO Xiaolang YANG Mei WANG Jiangyan WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Qingdao University of Science and Technology College of Chemistry and Molecular EngineeringQingdao 266061P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Qingdao University of Science and Technology College of Chemistry and Molecular EngineeringQingdao 266061P.R.China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049P.R.China

Li-rich layered oxide cathode materials have drawn great attention due to their high specific capacity and relatively low ***,their implementation is hindered by capacity and discharge voltage decay as well as poor rate ***,by combining the concepts of geometrical and atomic structure design,hollow multishelled structural Li-rich cathode material doped with aluminum element(Li-rich HoMS-AI)is developed to solve the above ***-rich HoMS-AI is synthesized through a facile sequential templating approach with the shell number,element molar ratio and AI doping amount accurately *** can effectively buffer the stress/strain during cycling,as well as shorten the ion and electron diffusion path,while AI doping can inhibit the phase transition of the material and reduce the surface oxygen *** a result,it achieved a high specific capacity,stable voltage and capacity during cycling,exhibiting an initial discharge specific capacity up to 300.6 mA·h·g-1 at 0.1 C(1 C=300 mA/g)and maintaining 246.3 mA·h·g-1 after 100 cycles.

关键词： Li-rich layered oxide Hollow multishelled structure Aluminum doping Specific capacity Cycling stability

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A review of low-carbon technologies and projects for the global cement industry

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Journal of Environmental Sciences 2024年第2期136卷 682-697页

作者： Yangyang Guo Lei Luo Tingting Liu Liwei Hao Yinming Li Pengfei Liu Tingyu Zhu CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State Key Laboratory of Solid Waste Reuse for Building Materials Beijing Building Materials Academy of Sciences ResearchBeijing 100041China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

Carbon dioxide(CO_(2))emissions from the cement industry account for 26%of the total industrial emissions,and the need to develop low-carbon techniques within the cement industry is extremely ***-carbon projects and technologies for the cement industry in different regions and countries have been thoroughly reviewed in this manuscript,and the low-carbon development concept for each county has been *** developing countries such as China and India,energy saving and efficiency enhancement are currently the key points,while for developed countries and regions such as Europe,more efforts have been focused on carbon capture,utilization,and storage(CCUS).Global CCUS projects have been previously conducted,and the majority of CCUS projects are currently performed in Europe where major projects such as the CEMCAP,CLEANKER,and IEILAC projects represent the latest research progress in cement production technologies and low-carbon technologies for the global cement *** development of low-carbon cement technologies has changed from focusing on the end point to instead focusing on the source and process through the exploration of hydrogen and solar energies,and more disruptive and original technologies are expected to be developed,particularly in the cement industry in China.

关键词： Cement industry CO_(2)emissions Low carbon development Projects Carbon capture utilization and storage

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Toward the microporous zeolite family with tunable large-medium cage and pore opening

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Chinese Journal of Structural Chemistry 2024年第9期43卷 30-39页

作者： Zhenzhen Zhao Meichen Jiao Jiejie Ling Han Jiang Yan Gao Hao Xu Hai-Qing Li Jingang Jiang Peng Wu Le Xu State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing211816China Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular&Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200086China School of Chemistry and Materials Science Shanxi Normal UniversityTaiyuan030031China

Modulation of zeolite porosity,including the size and type of channel and cage,is essential for catalysis and *** zeolites with a variety of porous systems have been synthesized by hydrothermal or post-synthetic routes,there is still a lack of rational control of zeolite porosity in the range of large to medium pore/***,based on the rational structure building,the structure similarity between IWV topology with large-pore opening and supercage and NES topology with medium-pore opening and medium cage is *** on the guidance of structure building,two IWV-derived daughter zeolites with different framework compositions,(Si,Ge)-ECNU-31 and(Si,Ge,Al)-ECNU-31,are hydrothermally prepared with built-in structural weakness due to the presence of a large amount of framework Ge atoms,which are utilized to prepare ECNU-32 zeolite with NES topology through subsequent post-synthetic treatment under controlled *** is demonstrated that the parent IWV zeolite with only Ge and Si as framework atoms is benefit in post-treatment to obtain a highly crystalline NES *** contrast,the co-existence of framework Al atoms in(Si,Ge,Al)-ECNU-31 zeolite enhances its hydrothermal stability in ***,the treatment with acid and amine solutions causes the partial collapse of zeolite *** results demonstrate that rational selection of the framework composition and post-synthetic parameters are crucial for the transformation of large-pore zeolite to medium-pore zeolite.

关键词： IWV NES Structure transformation Zeolite porosity

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