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化学团聚促进电除尘脱除烟气中PM_(2.5)和SO_3

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化工学报 2016年第9期67卷 3902-3909页

作者：胡斌刘勇杨春敏侯大伟袁竹林杨林军东南大学能源热转换及其过程测控教育部重点实验室江苏南京210096 中国矿业大学电力工程学院江苏徐州221116

化学团聚技术是实现燃煤烟气超净排放的有效技术之一,采用燃煤热态实验系统,分析探讨化学团聚技术促进电除尘对PM_(2.5)和SO_3的脱除作用,考察了化学团聚剂添加前后细颗粒化学组分及粒径的变化,以及化学团聚室、电除尘出口PM_(2.5)和SO_... 详细信息

化学团聚技术是实现燃煤烟气超净排放的有效技术之一,采用燃煤热态实验系统,分析探讨化学团聚技术促进电除尘对PM_(2.5)和SO_3的脱除作用,考察了化学团聚剂添加前后细颗粒化学组分及粒径的变化,以及化学团聚室、电除尘出口PM_(2.5)和SO_3浓度变化,并分析促进PM_(2.5)和SO_3脱除的机理。结果表明:喷入化学团聚剂后,细颗粒粒径峰值由0.1μm增大到3μm左右,细颗粒化学组分基本保持不变;电除尘出口细颗粒物数量浓度由5.8×10~4 cm^(-3)降低到3.2×104 cm^(-3),电除尘效率提高45%;烟气SO_3浓度由40 mg·m^(-3)提高到100 mg·m^(-3)时,单一化学团聚对SO_3的脱除效率由42%提高到68%,协同电除尘SO_3脱除效率由66%提高到86%。

关键词：化学团聚 PM_(2.5) SO_3 协同脱除

石灰石-石膏法脱硫过程中浆液雾化夹带与细颗粒排放的关系

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化工学报 2018年第4期69卷 1714-1722页

作者：侯大伟潘丹萍周心澄黄荣廷沈凯杨林军东南大学能源热转换及其过程测控教育部重点实验室江苏南京210096

脱硫浆液的雾化夹带是导致石灰石-石膏法脱硫过程中细颗粒物排放特征发生显著变化的主要原因。利用相位多普勒粒度分析仪(PDA)、电称低压冲击器(ELPI^+)在线测试分析了脱硫浆液雾化、夹带特性及其与细颗粒物排放的关系。结果表明,石灰石... 详细信息

脱硫浆液的雾化夹带是导致石灰石-石膏法脱硫过程中细颗粒物排放特征发生显著变化的主要原因。利用相位多普勒粒度分析仪(PDA)、电称低压冲击器(ELPI^+)在线测试分析了脱硫浆液雾化、夹带特性及其与细颗粒物排放的关系。结果表明,石灰石-石膏法烟气脱硫过程中浆液雾化夹带可导致脱硫净烟气中含大量细小雾滴及亚微米级细颗粒,脱硫净烟气中雾滴粒径与喷嘴的雾化效果有关,主要集中在20μm以下,雾滴含固量为脱硫浆液的20%~40%。脱硫操作参数如空塔气速、液气比和浆液浓度对脱硫净烟气中的雾滴夹带量存在显著影响,适当降低空塔气速、液气比及浆液浓度,优化喷淋工艺如增加喷淋层、合理布置脱硫喷嘴,能够有效抑制浆液夹带作用,进而降低脱硫净烟气中细颗粒物的排放浓度。

关键词：石灰石-石膏法脱硫浆液雾化浆液夹带细颗粒物

Candy or poison: Plant metabolites as swing factors against microbes

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Molecular Plant 2024年第9期17卷 1341-1343页

作者： Liyuan Wang Yu Xia Yingnan hou Shanghai Collaborative Innovation Center of Agri-Seeds School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China

Plant metabolites play crucial roles in plant-microbe interactions,influencing compatibility with different microbial species and modulating both symbiotic and pathogenic *** synthesize two categories of metabolites:primary and secondary metabolites,each serving specific functions in plant physiology and *** metabolites,including sugars,lipids,nucleotides,amino acids,and organic acids,are essential for plant growth and ***,these metabolites also serve as nutrient sources for *** invasion of devastating pathogens relies heavily on their ability to effectively acquire primary metabolites from host *** instance,transcriptional activator-like effectors from Xanthomonas and Ralstonia are known to trigger the transcription of OsSWEET genes,which encode sugar transporters.

关键词： invasion sugar Plant

Provably secure attribute-based authenticated encryption with keyword search from ideal lattices

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Science China(Information Sciences) 2024年第1期67卷 308-309页

作者： Lisha YAO Lin hou Jian WENG Feixiang ZHAO College of Cyber Security Jinan University

A public-key authenticated encryption with keyword search(PAEKS)[1, 2] system overcomes the problem of an inside adversary forging searchable ciphertexts and guessing the keyword information from the given token. This system allows the sender to encrypt and authenticate a ***, traditional PAEKS schemes require the sender to specify the intended receiver in advance, losing much flexibility.

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Oxidative Desulfurization of Fuel Oil with H_(3)PO_(4)-based Deep Eutectic Solvents

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 178-186页

作者： Li Xiuping Zhang Jiayin hou Liangpei Zhao Rongxiang School of Petrochemical Engineering Liaoning Petrochemical UniversityFushun 113001China

A series of Lewis-acid deep eutectic solvents (DESs) were synthesized by stirring phosphoric acid and zincchloride as raw materials at 80℃ to form H_(3)PO_(4)/nZnCl_(2) (n = 0.1, 0.25, 0.5, 0.75, 1). The DESs were characterized byFourier transform infrared spectrophotometry (FT-IR), thermogravimetry/differential thermogravimetry (TG/DTG), andelectron spray ionization mass spectrometry (ESI-MS). The DESs were used as both extractants and catalysts to removedibenzothiophene from fuels via oxidative desulfurization (ODS). Experiments were performed to investigated the influenceof factors such as composition of DES, temperature, oxidant dosage (molar ratio of O:S), DES dosage (volume ratio ofDES:oil), and number of cycles on desulfurization rate. The results indicated that the removal rate of dibenzothiophene (DBT)was affected by the Lewis acidic DESs, with that of H_(3)PO_(4)/0.25∙ZnCl_(2) reaching 96.4% under optimal conditions (Voil=5 mL,VDES=1 mL, an oxidant dosage of 6, T=50 ℃). After six cycles, the desulfurization rate of H_(3)PO_(4)/0.25∙ZnCl_(2) remained above94.1%. The apparent activation energy of dibenzothiophene (DBT) removal reaction was determined by a pseudo-first orderkinetic equation according to the Arrhenius equation to be 32.34 kJ/mol, as estimated. A reaction mechanism is proposedbased on the experimental data and characterization results.

关键词： deep eutectic solvents phosphoric acid zinc chloride oxidative desulfurization

Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

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Carbon Energy 2024年第4期6卷 164-221页

作者： Huilin hou Gang Shao Yang Wang Wai‐Yeung Wong Weiyou Yang Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental *** a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC ***,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible ***,some prospects concerning the challenges and research directions in this area are proposed.

关键词： hydrogen photoanode photoelectrochemical substrates water splitting

Numerical and theoretical study of load transfer behavior during cascading pillar failure

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3014-3033页

作者： Hangyu Dong Wancheng Zhu Leilei Niu Chen hou Xige Liu College of Geosciences and Engineering North China University of Water Resources and Electric PowerZhengzhou450046China Center for Rock Instability and Seismicity Research School of Resource and Civil EngineeringNortheastern UniversityShenyang110819China

To further study the load transfer mechanism of roofemulti-pillarefloor system during cascading pillar failure(CPF),numerical simulation and theoretical analysis were carried out to study the three CPF modes according to the previous experimental study on treble-pillar specimens,*** failure mode(SFM),domino failure mode(DFM)and compound failure mode(CFM).Based on the finite element code rock failure process analysis(RFPA^(2D)),numerical models of treble-pillar specimen with different mechanical properties were established to reproduce and verify the experimental results of the three CPF *** results show that the elastic rebound of roofefloor system induced by pillar instability causes dynamic disturbance to adjacent pillars,resulting in sudden load increases and sudden jump displacement of adjacent *** phenomena of load transfer in the roofemulti-pillarefloor system,as well as the induced accelerated damage behavior in adjacent pillars,were discovered and *** addition,based on the catastrophe theory and the proposed mechanical model of treble-pillar specimen edisc spring group system,a potential function that characterizes the evolution characteristics of roof emulti-pillarefloor system was *** analytical expressions of sudden jump and energy release of treble-pillar specimenedisc spring group system of the three CPF modes were derived according to the potential *** numerical and theoretical results show good agreement with the experimental *** study further reveals the physical essence of load transfer during CPF of roof emulti-pillarefloor system,which provides references for mine design,construction and disaster prevention.

关键词： Cascading pillar failure(CPF) Load transfer Multi-pillar Numerical simulation

Intelligent casting:Empowering the future foundry industry

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China Foundry 2024年第5期21卷 409-426页

作者： Jin-wu Kang Bao-lin Liu Tao Jing hou-fa Shen School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing TechnologyTsinghua UniversityBeijing 100084China

Emerging technological advances are reshaping the casting sector in latest *** technology is evolving towards intelligent casting paradigm that involves automation,greenization and intelligentization,which attracts more and more attention from the academic and industry *** this paper,the main features of casting technology were briefly summarized and forecasted,and the recent developments of key technologies and the innovative efforts made in promoting intelligent casting process were ***,the technical visions of intelligent casting process were also put *** key technologies for intelligent casting process comprise 3D printing technologies,intelligent mold technologies and intelligent process control *** future,the intelligent mold that derived from mold with sensors,control devices and actuators will probably incorporate the Internet of Things,online inspection,embedded simulation,decision-making and control system,and other technologies to form intelligent cyber-physical casting system,which may pave the way to realize intelligent *** is promising that the intelligent casting process will eventually achieve the goal of real-time process optimization and full-scale control,with the defects,microstructure,performance,and service life of the fabricated castings can be accurately predicted and tailored.

关键词： intelligent casting 3D printing intelligent mold process control cyber-physical casting system embedded simulation

Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1262-1279页

作者： Yachen Xie Michael Z.hou Hejuan Liu Cunbao Li Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy Shenzhen UniversityShenzhen518060China Institute of Subsurface Energy Systems Clausthal University of TechnologyClausthal-Zellerfeld38678Germany State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Understanding the anisotropic creep behaviors of shale under direct shearing is a challenging *** this context,we conducted shear-creep and steady-creep tests on shale with five bedding orientations (i.e.0°,30°,45°,60°,and 90°),under multiple levels of direct shearing for the first *** results show that the anisotropic creep of shale exhibits a significant stress-dependent *** a low shear stress,the creep compliance of shale increases linearly with the logarithm of time at all bedding orientations,and the increase depends on the bedding orientation and creep *** high shear stress conditions,the creep compliance of shale is minimal when the bedding orientation is 0°,and the steady-creep rate of shale increases significantly with increasing bedding orientations of 30°,45°,60°,and 90°.The stress-strain values corresponding to the inception of the accelerated creep stage show an increasing and then decreasing trend with the bedding orientation.A semilogarithmic model that could reflect the stress dependence of the steady-creep rate while considering the hardening and damage process is *** model minimizes the deviation of the calculated steady-state creep rate from the observed value and reveals the behavior of the bedding orientation's influence on the steady-creep *** applicability of the five classical empirical creep models is quantitatively *** shows that the logarithmic model can well explain the experimental creep strain and creep rate,and it can accurately predict long-term shear creep *** on an improved logarithmic model,the variations in creep parameters with shear stress and bedding orientations are *** abovementioned findings,a mathematical method for constructing an anisotropic shear creep model of shale is proposed,which can characterize the nonlinear dependence of the anisotropic shear creep behavior of shale on the bedding orientation.

关键词： Rock anisotropy Direct shear creep Creep compliance Steady-creep rate Empirical model Creep constitutive model