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Anti-aging performance improvement and enhanced combustion efficiency of boron via the coating of PDA

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Defence Technology（防务技术） 2024年第3期33卷 399-410页

作者： Shuai Ma Qinghai Shu Mengyang Zhang hongyu huang Yansong Shi Xijuan Lv Shuai Zhao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing100081China Tangshan Research Institute of Beijing Institute of Technology Tangshan063000HebeiChina

Boron is an ambitious fuel in energetic materials since its high heat release values,but its application is prohibited by low combustion efficiency and oxidization during *** polydopamine(PDA)was introduced into boron particles,investigating the impact of PDA content on the energetic behavior of *** results indicated that the PDA coating formed a fishing net structure on the surface of boron *** heat release results showed that the combustion calorific value of B@PDA was higher than that of the raw ***,the actual combustion heat of boron powder in B@10%PDA increased by 38.08%.Meanwhile,the DSC peak temperature decreased by 100.65℃under similar oxidation rate compared to raw ***,the B@PDA@AP and B@AP composites were prepared,and their combustion properties were *** was demonstrated that B@10%PDA@AP exhibited superior performance in terms of peak pressure and burning time,*** peak pressure is 12.43 kPa more than B@AP and burning time is 2.22 times higher than B@***,the coating of PDA effectively inhibits the oxidization of boron during storage and enhances the energetic behavior of boron and corresponding composites.

关键词： Boron particles Polydopamine Anti-aging performance improvement Heat release

辅助生殖技术中异位妊娠风险的相关性因素研究

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实用妇科内分泌电子杂志 2024年第13期11卷 27-29页

作者：黄洪玉昆明医科大学第一附属医院生殖遗传科超声室云南昆明650032

在体外受精-胚胎移植(IVF-ET)技术的快速发展过程中,异位妊娠(EP)的发生率也在逐渐上升。由于辅助生殖技术(ART)过程中发生EP的具体原因与机理目前尚不清楚,大多数认为发生EP的危险因素为输卵管功能异常、ART的操作及体内激素水平异常... 详细信息

在体外受精-胚胎移植(IVF-ET)技术的快速发展过程中,异位妊娠(EP)的发生率也在逐渐上升。由于辅助生殖技术(ART)过程中发生EP的具体原因与机理目前尚不清楚,大多数认为发生EP的危险因素为输卵管功能异常、ART的操作及体内激素水平异常等。本文对IVF-ET助孕中与EP发生相关的因子作一综述。

关键词：辅助生殖技术异位妊娠风险因素

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污泥热解气/氨旋流火焰燃烧特性

新能源进展 2024年第1期12卷 15-23页

作者：吴宁陈达南郭怡君李军黄宏宇广州环保投资集团有限公司广东省垃圾焚烧技术与装备工程实验室广州510015 中国科学院广州能源研究所广州510640 中国科学技术大学能源科学与技术学院广州510640 江西省碳中和研究中心南昌330096

污泥热解气因难以被有效利用导致了大量的能源浪费,而其中所含的氢气、甲烷等可燃组分可有效提升氨燃料的燃烧性能。对污泥热解气掺氨旋流火焰的结构及燃烧特性进行分析,基于化学发光法,通过实验考察当量比、掺氨比对火焰结构的影响。... 详细信息

污泥热解气因难以被有效利用导致了大量的能源浪费,而其中所含的氢气、甲烷等可燃组分可有效提升氨燃料的燃烧性能。对污泥热解气掺氨旋流火焰的结构及燃烧特性进行分析,基于化学发光法,通过实验考察当量比、掺氨比对火焰结构的影响。结果表明,旋流燃烧火焰中的OH*在化学当量条件(φ=1.0)下辐射强度最大,CH*在富燃条件(φ=1.2)下辐射强度最大,OH*可以对火焰稳定性进行更好地表征;污泥热解气/氨气混合燃料中,随着氨气比例增大,旋流火焰稳定性下降。

关键词：热解气氨气化学发光旋流火焰稳定性污染物控制

纳米多孔碳孔径对SrBr_(2)化学蓄放热性能的影响

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新能源进展 2024年第3期12卷 269-275页

作者：吴佳涛曾涛李军邓立生黄宏宇中国科学技术大学能源科学与技术学院广州510640 中国科学院广州能源研究所广州510640

溴化锶(SrBr_(2))被认为是化学蓄热领域最有前景的材料之一。为探究载体孔径大小对SrBr_(2)蓄放热性能的影响,分别以孔径为10、30、50和100 nm的纳米多孔碳(NCP)为载体,采用浸渍法制备多孔碳基SrBr_(2)复合材料。通过XRD、SEM和BET对复... 详细信息

溴化锶(SrBr_(2))被认为是化学蓄热领域最有前景的材料之一。为探究载体孔径大小对SrBr_(2)蓄放热性能的影响,分别以孔径为10、30、50和100 nm的纳米多孔碳(NCP)为载体,采用浸渍法制备多孔碳基SrBr_(2)复合材料。通过XRD、SEM和BET对复合材料的微观形貌结构进行表征,并通过水合实验和同步热分析对其蓄放热性能进行测试。结果表明,复合材料的吸水量和蓄热密度随孔径先增大后减小,存在最优载体孔径。其中,NCP50-SrBr_(2)具有最优的平衡吸水量和蓄热密度,分别为0.703 g/g和1198.62 kJ/kg。NCP50-SrBr_(2)表现出更快的反应速率,在水合反应30min后蓄热密度可达945.34kJ/kg。研究结果可为纳米尺度定向调控化学蓄热材料性能提供理论依据。

关键词：化学蓄热孔径溴化锶纳米多孔碳蓄放热性能

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电商平台剥削性价格模式的反垄断法规范研究

中国物价 2024年第3期 18-22页

作者：黄宏宇张春燕外交学院国际法系

在电商平台市场,反垄断法以规范竞争秩序为手段促进平台经济健康有序发展。然而,基于资本优势和对资本扩张的需求,电商平台逐渐走向垄断,剥削性价格是平台资本增长的重要方式,以削弱竞争秩序为基础剥削平台用户福利,同时冲击电商平台市... 详细信息

在电商平台市场,反垄断法以规范竞争秩序为手段促进平台经济健康有序发展。然而,基于资本优势和对资本扩张的需求,电商平台逐渐走向垄断,剥削性价格是平台资本增长的重要方式,以削弱竞争秩序为基础剥削平台用户福利,同时冲击电商平台市场利益公平分配秩序。对此,应明确相关问题的垄断违法性证成逻辑,关注经营者个体利益与平台用户利益的公平分配问题,并合理适用违法推定规则。此外,反垄断事后监管的消极性难以应对平台基于算法技术的高速演变性,对电商平台剥削性价格行为应采用以促进分配正义为导向、以规范引导价格行为为理念的事中监管模式。

关键词：电商平台剥削性价格消费者福利公平分配事中监管

Fabrication of LiOH-metal organic framework derived hierarchical porous host carbon matrix composites for seasonal thermochemical energy storage

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Nano Research 2022年第9期15卷 8028-8038页

作者： Xiangyu Yang Shijie Li Jianguo Zhao hongyu huang Lisheng Deng School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Institute of Carbon Materials Science Shanxi Datong UniversityDatong 037009China Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Guangdong Intelligent Filling Technology Limited Company Foshan 528137China

By virtue of its long lifespan and outstanding storage intensity with near-zero heat loss,salt hydrate thermochemical energy storage(TES)materials provide a feasible option for the effective use of renewable energy and overcoming its unsynchronized supply and ***,an activated porous carbon originating from the zeolite imidazolate framework(ZHCM)is fabricated and served as the carbon matrix for the LiOH TES *** as-synthesized Li/ZHCM2-40 not only has excellent storage intensity(maximum 2414.2 kJ·kg^(−1))with low charging temperature,but also shows great hydration properties stemming from the ultrahigh surface area and hierarchical porous structure of ***,this composite material exhibits superior thermal conductivity,while its storage intensity is only attenuated by 10.2%after 15 times of consecutive charge-discharge process,revealing its outstanding cycle *** the numerical simulation results also demonstrate its superior heat transfer *** developed LiOH TES composite may afford a new avenue for efficient low-grade thermochemical energy storage and liberate the possibility of further exploration of metal organic frameworks derived porous carbon matrix in the future.

关键词： LiOH TES composite ZIF-8 derived porous carbon low-grade thermochemical energy storage cycle stability

Development of covalent-organic frameworks derived hierarchical porous hollow carbon spheres based LiOH composites for thermochemical heat storage

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Journal of Energy Chemistry 2022年第10期31卷 301-310,I0007页

作者： Xiangyu Yang Shijie Li Jianguo Zhao hongyu huang Lisheng Deng Institute of Carbon Materials Science Shanxi Datong UniversityDatong 037009ShanxiChina School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640GuangdongChina Guangdong Intelligent Filling Technology Limited Company Foshan 528137GuangdongChina

Under the joint assistance of its excellent storage strength, accessible long storage lifespan, and high heat utilization efficiency, salt hydrate-based thermochemical heat storage(THS) materials give renewable energy an important outlet to alleviate the pressure of underutilization. Herein, an activated hollow spherical carbon(AHSC) with hierarchical porous architectures converted from covalent-organic frameworks(COFs) is constructed and utilized as the supporting matrix for Li *** composite material for the first time. The obtained Li/AHSC_(3) composites have distinguished hydration performance while manifesting impressive storage ability up to 1916.4 k J kg^(-1)with low operating temperature stemming from the collective effect of the void spherical framework, multimodal porosity, and high surface area of AHSC3. And the Li/AHSC3-40 composite with evidently progressed thermal conductivity is capable of realizing 94.5% heat preservation after twenty-five adsorption-desorption cycles, exhibiting its eminent cyclability and great heat transfer performance. This study not only brings new hope for overcoming the underutilization of low-grade heat but also may enlighten new ideas for enriching the application scenarios of COFs-derived carbonaceous materials.

关键词： Activated hollow spherical carbon Hierarchical porous architectures LiOH·THS composite material Storage ability COFs-derived carbonaceous materials

有机固体废弃物热解气掺氨预混旋流火焰结构研究

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燃烧科学与技术 2024年第3期30卷 239-247页

作者：郭怡君陈达南李兴李军赖诗妮黄宏宇小林敬幸中国科学院广州能源研究所广州510640 中国科学技术大学工程科学学院合肥230027 中国科学技术大学能源科学与技术学院广州510640 江西省碳中和研究中心南昌330096 名古屋大学化学工程系名古屋464-8603

由于有机固废热解产生的热解气热值较低,在一些燃烧器中无法燃烧,故采用旋流和掺混无碳燃料氨气的燃烧方式,以增强热解气燃烧的稳定性并减少碳排放.采用化学发光法对火焰结构进行了实验研究,基于CCD摄像系统,获得了不同当量比和掺氨比... 详细信息

由于有机固废热解产生的热解气热值较低,在一些燃烧器中无法燃烧,故采用旋流和掺混无碳燃料氨气的燃烧方式,以增强热解气燃烧的稳定性并减少碳排放.采用化学发光法对火焰结构进行了实验研究,基于CCD摄像系统,获得了不同当量比和掺氨比下热解气/氨气/空气预混旋流火焰中OH^(*)的化学发光分布.结果表明,不同类型热解气的旋流火焰形态结构差异较大;当量比增加到φ≥1时,OH^(*)辐射强度增强;掺氨使得热解气燃烧极限范围变窄,氨气的添加不仅会抑制OH^(*)自由基的产生,且会对火焰结构产生影响.

关键词：热解气体氨气旋流燃烧预混火焰 OH^(*)化学发光

Numerical Analysis of Conjugated Heat and Mass Transfer of Helical Hollow Fiber Membrane Tube Bank for Seawater Distillation

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Journal of Renewable Materials 2022年第7期10卷 1845-1858页

作者： Tao Zeng Lisheng Deng Jiechao Chen hongyu huang Hanli Zhuang Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China Dongguan University of Technology Dongguan523808China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China

A numerical study on the conjugated heat-mass transfer of helical hollow fiber membrane tube bank(HFMTB)for seawater desalination was carried *** and mathematical models of fluid flow,temperature and humidity distribution were constructed to investigate the influences of flow type,Reynolds number,and temperature on the conjugated heat-mass transfer performance of hollow fibers in the distillation membrane *** conjugated heat-mass transfer characteristics of HFMTB were discussed by utilizing the friction coefficient,Nusselt number(Nu),and Sherwood number(Sh).Results demonstrate that a distillation efficiency enhancement of 29%compared to the straight HFMTB has been detected for four-helical HFMTB configuration,though the friction coefficient of such a module is about 4 times of their straight *** values of average Nu and Sh numbers are increasing with tube number,which improves distillation *** effect of flow type has been studied by employing the upstream and downstream flows to the double-helical HFMTB,demonstrating upstream flow type is more conducive to the heat-mass transfer *** the outlet air humidity(ω)and distillation efficiency(η)decrease with the air-side Reynolds number(Rea)and inlet air temperature in the helical HFMTB while increasing with the solution-side Reynolds number(Re_(S))and inlet solution ***,the obtained results indicate that helical HFMTB applying upstream flow has great potential to achieve high-performance SGMD for seawater *** is anticipated that the present work can assist in a better understanding of the membrane desalination process in HFMTB and thus provide theoretical suggestions for further optimization and development.

关键词： Helical hollow fiber membrane tube bank seawater desalination membrane distillation numerical simulation heat and mass transfer