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轨道交通工程大体量BIM轻量化技术

铁道建筑 2024年第7期64卷 154-157页

作者：薛志刚李一林胡振中广州地铁建设管理有限公司广州510220 清华大学深圳国际研究生院广东深圳518055

为解决轨道交通工程的建筑信息模型(Building Information Modeling,BIM)体量庞大导致的数据整合难度大的问题,本文提出了BIM轻量化技术。通过改进二次误差测度算法在降低模型复杂度的同时保留模型的细节和几何特征,并采用三角网格相似... 详细信息

为解决轨道交通工程的建筑信息模型(Building Information Modeling,BIM)体量庞大导致的数据整合难度大的问题,本文提出了BIM轻量化技术。通过改进二次误差测度算法在降低模型复杂度的同时保留模型的细节和几何特征,并采用三角网格相似性度量算法减少相似构件的存储次数,从而降低模型存储的数据量;对模型数据进行拆分和分步传输,从而提升模型传输速度;通过局部重建和动态剔除冗余构件优化显示效率,并对模型进行分区渲染,从而减少运行耗时。经在广州地铁18号线磨碟沙站应用,采用该技术将大体量模型轻量化后,占用的存储空间减少15.71%~35.87%,网格数量减少21.46%~31.65%,传输速度提高2.5~10.0 MB/s,且模型主要几何构件能以50.0~59.8帧/s的速度在自主开发的图形平台上清晰展示。

关键词：地铁车站轻量化理论分析 BIM 数据存储显示优化可视化

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低阶煤热溶萃取物的配煤炼焦性能

化工进展 2024年第5期43卷 2420-2427页

作者：刘显哲胡振中胡大为李显贺世泽赵纯亮夏慈良吴波张小勇罗光前姚洪华中科技大学能源与动力工程学院煤燃烧国家重点实验室湖北武汉430074 宝钢工程技术集团有限公司上海201999 上海骁齐新材料科技有限公司上海201799 山西太钢不锈钢股份有限公司焦化厂山西太原030003 安徽工业大学化学与化工学院安徽马鞍山243002

目前,使用黏结性添加物进行配煤炼焦,降低焦/肥煤的使用比例,是焦化行业降本增效的重要途径。国内外学者已经在实验室阶段初步证明了低阶煤热溶萃取物替代焦/肥煤炼焦的可行性,工业化应用需要开展大规模的萃取物炼焦实际验证。基于此,... 详细信息

目前,使用黏结性添加物进行配煤炼焦,降低焦/肥煤的使用比例,是焦化行业降本增效的重要途径。国内外学者已经在实验室阶段初步证明了低阶煤热溶萃取物替代焦/肥煤炼焦的可行性,工业化应用需要开展大规模的萃取物炼焦实际验证。基于此,本文搭建了低阶煤热溶萃取装置,并与多家焦化厂展开合作,完成了萃取物替代焦/肥煤的小焦炉实验验证。结果表明:萃取物取代20%肥煤或10%焦煤时能够明显降低焦炭的灰分,保持焦炭冷热性能基本不变。并且萃取物在炼焦过程中有72%~77%的留存率,不会造成焦炭产量的明显降低。因此,本研究明确了低阶煤热溶萃取物取代焦/肥煤炼焦方案的可行性,为焦化行业的降本增效提供了新选择,并进一步推动了低阶煤热溶萃取技术的工业化进展。

关键词：低阶煤碳氢化合物热解溶剂萃取焦化

超薄壁TiO_(2)(B)纳米管制备及其储锂性能研究

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河北工业大学学报 2024年第3期53卷 58-64页

作者：李虎振甄蒙蒙胡振中河北工业大学能源与环境工程学院天津300401

采用简易的水热法制备了具有超薄壁的TiO_(2)(B)纳米管(TBTs)及对比材料TiO_(2)(B)纳米棒(TBRs),并通过X射线衍射、扫描电子显微镜、透射电子显微镜和氮气吸附-脱附等温线等分析技术对所制备的超薄壁TBTs和TBRs进行了表征。结果表明,所... 详细信息

采用简易的水热法制备了具有超薄壁的TiO_(2)(B)纳米管(TBTs)及对比材料TiO_(2)(B)纳米棒(TBRs),并通过X射线衍射、扫描电子显微镜、透射电子显微镜和氮气吸附-脱附等温线等分析技术对所制备的超薄壁TBTs和TBRs进行了表征。结果表明,所制备的TBTs材料具有明显的内部空腔、1~2 nm的壁厚及开放的顶端。得益于超薄壁纳米管结构,所制备的TBTs材料作为锂电池负极材料表现出了增强的锂动力学和优异的循环性能,在2.0 C下循环200次时比容量高达212 mA∙h∙g^(-1),在5.0 C下循环1000次时比容量达111 mA∙h∙g^(-1)。该工作为高性能钛基氧化物的制备提供了新的方向。

关键词：超薄壁负极材料锂离子电池水热法锂动力学

Uncovering mechanism of photocatalytic performance enhancement induced by multivariate defects on SnS_(2)

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Nano Research 2023年第2期16卷 2102-2110页

作者： Sheng-Qi Guo Bo Yang zhenzhong hu Mengmeng Zhen Bingchuan Gu Boxiong Shen Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300401China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Huaibei Normal UniversityHuaibei 235000China State Key Laboratory of Particle Detection and Electronics University of Science&Technology of ChinaHefei 230026China

Defect engineering is recognized as an effective route to obtain highly active photocatalytic ***,the current understanding of defects is mainly limited to isolated atomic vacancy defects,ignoring the exploration of the functions of multivariate defects formed by the deletion of several adjacent atoms in photocatalytic ***,we prepared SnS2 nanostructures with the same morphology but different dominant defects,and by testing their photocatalytic performance,it was found that the multivariate defects can significantly improve the photocatalytic performance than isolated S *** experiments and theoretical calculations,we confirmed that the promotion of multivariate defects,especially“S-Sn-S”vacancy associates,on the photocatalytic performance is reflected in many aspects,such as the regulation of the energy band structure,the improvement of the charge separation efficiency,and the promotion of the adsorption and activation of guest ***2 with“S-Sn-S”vacancy associates exhibits excellent photocatalytic water purification *** the induction of“S-Sn-S”vacancy associates,phenol was thoroughly photocatalytically decomposed,further confirming its excellent *** work not only provides new insights into identifying advantage defects in the catalyst structure,but also offers new ideas for constructing highly active photocatalysts based on defect engineering.

关键词： SnS2 multivariate defects photocatalysis pollutants degradation reaction mechanism

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废旧锂离子电池负极石墨的回收与应用

河北工业大学学报 2024年第1期53卷 35-52页

作者：胡振中徐圣罗佳唐学静河北工业大学能源与环境工程学院河北省动力系统污染物控制技术创新中心天津300401 天津市清洁能源利用与污染物控制重点实验室天津300401

电动汽车行业的飞速发展使得废旧锂离子电池的数量急剧增长,从资源利用和环境保护的角度而言,废旧锂离子电池的回收变得尤为重要。石墨不仅是锂离子电池中的关键材料,还被诸多国家列为战略资源。因此,如何高效且环保地回收再利用废旧锂... 详细信息

电动汽车行业的飞速发展使得废旧锂离子电池的数量急剧增长,从资源利用和环境保护的角度而言,废旧锂离子电池的回收变得尤为重要。石墨不仅是锂离子电池中的关键材料,还被诸多国家列为战略资源。因此,如何高效且环保地回收再利用废旧锂离子电池中的石墨成为了迫切问题。本文从全生命周期的视角对废旧石墨回收与再利用研究进展进行了综述,并且从回收成本、环保性、产品附加值、是否便于工业应用的角度进行了评价。首先,概述了延长锂离子电池使用寿命的梯级利用策略和废旧石墨回收前的预处理方法。其次,将回收方法按热法回收、浸出回收、直接回收进行了分类介绍。随后,按照应用场景的不同对废旧石墨再应用方法进行了回顾。最后,对石墨回收与再利用方法所面临的困难进行了总结分析,为今后的研究提供了参考。

关键词：废旧锂离子电池石墨预处理回收再应用

N-Doped Carbon Nanofibrous Film with Unique Wettability,Enhanced Supercapacitive Property,and Facile Capacity to Demulsify Surfactant Free Oil-in-water Emulsions

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Chemical Research in Chinese Universities 2021年第3期37卷 436-442页

作者： WANG Ruifang LEI Weiwei WANG Lei LI Zhenyu CHEN Jingyu hu zhenzhong State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500P.R.China Center of Functional Materials for Working Fluids of Oil and Gas Field School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu610500P.R.China Institute for Frontier Materials Deakin UniversityGeelong/MelbourneAustralia Chengdu Evermaterials Co. Ltd.Chengdu610500P.R.China Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401P.R.China

Electrospinning and calcination technique have been combined to fabricate N-doped carbon nanofibers(N-CNFs)by introducing amino grafted few-layered hexagonal boron nitride(amino@BN)into polyacrylonitrile(PAN)matrix as filler followed by *** the high N-doping level(10.7%,atomic fraction)with the final product,the as-prepared N-CNFs exhibit interesting surface wettability(superamphiphilicity in air and underwater oleophilicity).Moreover,compared with pristine PAN derived carbon nanofibers(marked as CNFs),N-CNFs exhibit higher graphic structure under fixed carbonizing temperature as *** these advantages aforementioned,the as-prepared N-CNFs exhibit good specific capacitance(ca.200.1 F/g)without activation treatment at the current density of 0.5 A/g in three-electrode configuration,which is about 149%that of CNFs(ca.134 F/g).What’s more,our N-CNFs also display the unexpected capacity to demulsify diverse surfactant free oil-in-water emulsions by simple filtration in large scale with the high water flux ca.(23578±150)L·m^(−2)·h^(−1).

关键词： Carbon nanofibrous membrane Unique wettability Supercapacitor Demulsification of oil-water emulsion

Composition-dependent micro-structure and photocatalytic performance of g-C_(3)N_(4) quantum dots@SnS2 heterojunction

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Nano Research 2021年第11期14卷 4188-4196页

作者： Sheng-Qi Guo Haijun Zhang zhenzhong hu Mengmeng Zhen Bo Yang Boxiong Shen Fan Dong Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China Center for Aircraft Fire and Emergency Department of Safety EngineeringCivil Aviation University of ChinaTianjin300300China Yangtze Delta Region Institute(huzhou) &Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaHuzhou313001China Institute of Advanced Technology University of Science and Technology of ChinaHefei230088China

Semiconductor combination is one of the most common strategies to obtain high-efficiency photocatalysts;however, the effect mechanism of composition ratio on micro-structure and photocatalytic activity is remaining unclear. In this study, a case of g-C_(3)N_(4) quantum dots@SnS_(2) (CNQDn@SnS_(2)) heterojunction with different ratio of CNQD is used to uncover the origin of optimum and excess composition for photocatalysts. Research on the functional mechanism of the optimum composition shows that 0.8 wt.% CNQD are completely attached to the non-(001) facets of SnS_(2), which benefits the formation of type-II heterojunction, resulting in an optimal pollutant degradation and mineralization efficiency. For the excess composition, both experiments and theoretical calculations confirm that excess CNQD (the part exceeding of 0.8 wt.%) located on the (001) facet of SnS_(2), leading to the type-I band alignment of this heterojunction, which severely restricts the separation of photo-induced charge carriers, and thus reduces their lifetime. This work makes the functional mechanism of composition ratio on micro-structure and photocatalytic activity clearer. Related research results provide a new insight into semiconductor combination study and take an important step toward the rational design of highly active photocatalysts.

关键词： heterojunction semiconductor combination composition ratio photocatalyst functional mechanism

Development of a hybrid photo-bioreactor and nanoparticle adsorbent system for the removal of CO2,and selected organic and metal co-pollutants

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Journal of Environmental Sciences 2017年第7期29卷 41-53页

作者： Andrea A.Rocha Christian Wilde zhenzhong hu Oleg Nepotchatykh Yevgen Nazarenko Parisa A.Ariya Department of Atmospheric&Oceanic Sciences McGill UniversityMontrealQC H3A OB9Canada Department of Chemistry McGill UniversityMontrealQC H3A 0B9Canada PO-Laboratories Inc.Saint-LaurentQC H4T 1N3Canada

Fossil fuel combustion and many industrial processes generate gaseous emissions that contain a number of toxic organic pollutants and carbon dioxide（CO_2） which contribute to climate change and atmospheric *** is a need for green and sustainable solutions to remove air pollutants,as opposed to conventional techniques which can be expensive,consume additional energy and generate further *** developed a novel integrated bioreactor combined with recyclable iron oxide nano/micro-particle adsorption interfaces,to remove CO_2,and undesired organic air pollutants using natural particles,while generating *** semi-continuous bench-scale photo-bioreactor was shown to successfully clean up simulated emission streams of up to 45% CO_2 with a conversion rate of approximately 4%CO_2 per hour,generating a steady supply of oxygen（6 mmol/hr）,while nanoparticles effectively remove several undesired organic *** also showed algal waste of the bioreactor can be used for mercury *** estimated the potential CO_2 emissions that could be captured from our new method for three industrial cases in which,coal,oil and natural gas were *** a 30% carbon capture system,the reduction of CO_2 was estimated to decrease by about 420,000,320,000 and 240,000 metric tonnes,respectively for a typical 500 MW power *** cost analysis we conducted showed potential to scale-up,and the entire system is recyclable and *** further discuss the implications of usage of this complete system,or as individual units,that could provide a hybrid option to existing industrial setups.

关键词： Air pollution mitigation Climate change CO_2 capture Hybrid system Nanoparticle adsorption interfaces

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生物质气压烘焙技术研究进展

化工进展 2024年第5期43卷 2494-2511页

作者：石鎏胡振中李显孙一鸣童珊刘显哲郭丽刘豪彭冰李硕罗光前姚洪华中科技大学能源与动力工程学院煤燃烧与低碳利用全国重点实验室湖北武汉430074 新疆大学化工学院新疆煤炭清洁转化与化工自治区重点实验室新疆乌鲁木齐830002 新疆维吾尔自治区计量测试研究院新疆乌鲁木齐830011

气压烘焙技术具备反应条件温和、能耗低、脱氧效率高、能量回收率高、半焦燃料品质近似次烟煤等优势,是一种有希望替代传统烘焙的新型技术之一。本文介绍了气压烘焙的发展脉络,综述了气压烘焙工况优化(包括原料种类、温度、压力、时间)... 详细信息

气压烘焙技术具备反应条件温和、能耗低、脱氧效率高、能量回收率高、半焦燃料品质近似次烟煤等优势,是一种有希望替代传统烘焙的新型技术之一。本文介绍了气压烘焙的发展脉络,综述了气压烘焙工况优化(包括原料种类、温度、压力、时间)、产物组成与理化特性,阐述了气压烘焙宏观反应路径和微观反应机理,着重介绍了半焦的燃烧、热解、气化利用途径,回顾了气压烘焙的反应器设计及其在含氯固废、污泥等处置中的拓展。最后对气压烘焙技术可将生物质转化为高品质固体燃料,直接替代煤炭进行了总结和展望。

关键词：生物质气压烘焙脱氧优化产物特性