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Activity and Selectivity of Bimetallic Catalysts Based on SBA-15 for Nitrate Reduction in Water

Materials Sciences and Applications 2023年第2期14卷 78-93页

作者： Mouhamad Rachini Mira Jaafar Nabil Tabaja Sami Tlais Rasha Hamdan Fatima Al Ali Ola Haidar Ali Jaber Mohammad Kassem Eugene Bychkov Lucette Tidahy Renaud Cousin dorothée dewaele Tayssir Hamieh Joumana Toufaily Laboratory of Materials Catalysis Environment and Analytical Methods (MCEMA) EDST FS Lebanese University Hariri Campus Hadath Lebanon Université du Littoral Cô te d’Opale (ULCO) LPCA EA 4493 F-59140 Dunkerque France Laboratory of Applied Studies for Sustainable development and Renewable Energy (LEAddER) EDST Lebanese University Hariri Campus Hadath Lebanon College of Engineering and Technology American University of the Middle East Kuwait Kuwait department of Chemistry American University of Beirut Riad El-Solh Beirut Lebanon laboratoire de Recherche et développement des Médicaments et des Produits Naturels RdMPN Faculty of Pharmacy Lebanese University Hariri Campus Hadath Lebanon Université du Littoral Cô te d’Opale UCEIV Unité de Chimie Environnementale et Interactions sur le Vivant EA 4492 SFR Condorcet FR CNRS 3417 Dunkerque France Centre Commun de Mesures Université du Littoral C&ocircte d’Opale Dunkerque France Faculty of Science and Engineering Maastricht University Maastricht The Netherlands

Nitrate from the application of nitrogen-based fertilizers in intensive agriculture is a notorious waste product, though it lacks cost-effective solutions for its removal from potential drinking water resources. Catalytic reduction appears to be a promising technique for converting nitrates to benign nitrogen gas. Mesoporous silica SBA-15 is a frequently used catalyst support that has large surface areas and highly ordered nanopores. In this work, mesoporous silica SBA-15 bimetallic catalysts for nitrate reduction were investigated. The catalyst was optimized for the selection of promoter metal (Sn and Cu), noble metal (Pd and Pt) and loading ratios of these metals at different temperatures and reduction conditions. The catalysts prepared were characterized by FT-IR, N2 physisorption, XRd, SEM, and ICP. All catalysts showed the presence of cylindrical mesoporous channels and uniform pore structures that remained even after metals loading. In the presence of a CO2 buffer, the catalysts 4Pd-1Cu/SBA-15 and 1Pt-1Cu/SBA-15 reduced at 100?C under H2 and 1Pd-1Cu/SBA-15 reduced at 200°C under H2 demonstrated very high nitrate conversion. Furthermore, the forementioned Pd catalysts had higher N2 selectivity (88% - 87%) compared to Pt catalyst (80%). Nitrate conversion by the 4Pd-1Cu/SBA-15 catalyst was significantly decreased to 81% in the absence of CO2.

关键词： Bimetallic Catalyst Heterogeneous Catalyst Nitrate Reduction SBA-15 XRd Bet SEM FTIR ICP

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Meta-analysis of CO_(2) conversion,energy efficiency,and other performance data of plasma-catalysis reactors with the open access PIONEER database

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Journal of Energy Chemistry 2023年第11期86卷 318-342,I0007页

作者： Antoine Salden Maik Budde Carolina A.Garcia-Soto Omar Biondo Jairo Barauna Marzia Faedda Beatrice Musig ChloéFromentin Minh Nguyen-Quang Harry Philpott Golshid Hasrack domenico Aceto Yuxiang Cai Federico Azzolina Jury Annemie Bogaerts Patrick da Costa Richard Engeln María Elena Gálvez Timo Gans Tomas Garcia Vasco Guerra Carlos Henriques Monika Motak Maria Victoria Navarro Vasile I.Parvulescu Gerard Van Rooij Bogdan Samojeden Ana Sobota Paolo Tosi Xin Tu Olivier Guaitella department of Physics University of Trento38100 PovoItaly department of Applied Physics and Science Education Eindhoven University of Technology5600 MB EindhovenThe Netherlands Instituto de plasmas e Fusão Nuclear Instituto Superior TécnicoUniversidade de Lisboa1049-001 LisboaPortugal LPP CNRSÉcole PolytechniqueSorbonne UniversitéUniversitéParis-SaclayIP-Paris 91128 PalaiseauFrance department of Organic Chemistry Biochemistry and CatalysisUniversity of BucharestBucharestRomania Research Group plasmaNT Department of ChemistryUniversity of AntwerpUniversiteitsplein 1Wilrijk B-2610Belgium dIFFER 5612AJ EindhovenThe Netherlands Instituto de Carboquímica ICB-CSIC Zaragoza 50018Spain Faculty of Energy and Fuels AGH University of KrakowKrakowPoland Institut Jean le Rond d’Alembert CNRS UMR 7190-Sorbonne UniversitéSaint-Cyr l’Ecole 78210France laboratoire Catalyse et Spectrochimie(LCS) CNRS-ENSICAEN-Universitéde Caen6 boulevard du Maréchal-Juin14000 CaenFrance CQE Centro de Química EstruturalInstituto Superior TécnicoUniversidade de LisboaAv.Rovisco Pais1049-001 LisboaPortugal School of Physical Sciences and National Centre for plasma Science and Technology Faculty of Science and HealthDublin City UniversityDublinIreland ASML De Run 65015504 DR VeldhovenThe Netherlands Faculty of Science and Engineering Maastricht University6229 GS MaastrichtThe Netherlands CNR Istituto per la Scienza e Tecnologia dei Plasmi(ISTP)Italy department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

This paper brings the comparison of performances of CO_(2)conversion by plasma and plasma-assisted catalysis based on the data collected from literature in this field,organised in an open access online *** tool is open to all users to carry out their own analyses,but also to contributors who wish to add their data to the database in order to improve the relevance of the comparisons made,and ultimately to improve the efficiency of CO_(2)conversion by *** creation of this database and database user interface is motivated by the fact that plasma-catalysis is a fast-growing field for all CO_(2)conversion processes,be it methanation,dry reforming of methane,methanolisation,or *** a result of this rapid increase,there is a need for a set of standard procedures to rigorously compare performances of different ***,this is currently not possible because the fundamental mechanisms of plasma-catalysis are still too poorly understood to define these standard *** however,the accumulated data within the CO_(2)plasma-catalysis community has become large enough to warrant so-called“big data”studies more familiar in the fields of medicine and the social *** enable comparisons between multiple data sets and make future research more effective,this work proposes the first database on CO_(2)conversion performances by plasma-catalysis open to the whole *** database has been initiated in the framework of a H_(2)0_(2)0 European project and is called the“PIONEER data Base”.The database gathers a large amount of CO_(2)conversion performance data such as conversion rate,energy efficiency,and selectivity for numerous plasma sources coupled with or without a *** data set is associated with metadata describing the gas mixture,the plasma source,the nature of the catalyst,and the form of coupling with the *** the database itself,a data extraction tool with direct visualisation features or advance

关键词： Open-access database on plasma-catalysis experiment CO_(2) conversion plasma-catalysis Carbon capture and utilisation(CCU) Energy efficiency Specific energy input dielectric barrier discharge Packed bed reactor Methanation dry reforming of methane

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Soot formation and oxidation during bio-oil gasification:experiments and modeling

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Journal of Energy Chemistry 2013年第5期22卷 701-709页

作者： Younes Chhiti Marine Peyrot Sylvain Salvador LEGI UJF-Grenoble 1/Grenoble-INP/CNRSBP 53Grenoble F-38041 France CEA/dRT/LITEN/dTBH/LTB laboratoire des Technologies pour la Biomasse 17 rue de Martyrs 38054Grenoble France Ecole des Mines d'Albi-Carmaux Centre RAPSODEE FRE CNRS 3213 Campus Jarlardroute de Teillet 81013Albi France

A model is proposed to describe soot formation and oxidation during bio-oil *** is based on the description of bio-oil heating,devolatilization,reforming of gases and conversion of both char and soot *** chemistry (159 species and 773 reactions) is used in the gas *** production is described by a single reaction based on C2H2species concentration and three heterogeneous soot oxidation *** support the validation of the model,three sets of experiments were carried out in a lab-scale Entrained Flow Reactor (EFR) equipped with soot quantification *** temperature was varied from 1000 to 1400 C and three gaseous atmospheres were considered:default of steam,large excess of steam(H2O/C=8),and the presence of oxygen in the O/C range of 0.075–*** model is shown to accurately describe the evolution of the concentration of the main gas species and to satisfactorily describe the soot concentration under the three atmospheres using a single set of identified kinetic *** to this model the contribution of different mechanisms involved in soot formation and oxidation in various situations can be assessed.

关键词： soot gasification pyrolysis partial oxidation bio-oil

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Extraordinarily stable and wide-temperature range sodium/potassium-ion batteries based on 1d SnSe2-SePAN composite nanofibers

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InfoMat 2023年第9期5卷 38-50页

作者： Yiyi Wang Fuyu Xiao Xi Chen Peixun Xiong Chuyuan Lin Hong-En Wang Mingdeng Wei Qingrong Qian Qinghua Chen Lingxing Zeng Engineering Research Center of Polymer Green Recycling of Ministry of Education College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouthe People's Republic of China Universitéde Picardie Jules Verne Laboratoire de Réactivitéet Chimie des Solides(LRCS)AmiensFrance Inorganic Chemistry I Technische Universität DresdenDresdenGermany College of Physics and Electronics Information Yunnan Key Laboratory of Optoelectronic Information TechnologyYunnan Normal UniversityKunmingthe People's Republic of China Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials Fuzhou UniversityFuzhouthe People's Republic of China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjinthe People's Republic of China

developing electrodes with long lifespan and wide-temperature adaptability is crucial important to achieve high-performance sodium/potassium-ion batteries(SIBs/PIBs).Herein,the SnSe2-SePAN composite was fabricated for extraordinarily stable and wide-temperature range SIBs/PIBs through a coupling strategy between controllable electrospinning and selenylation,in which SnSe2 nanoparticles were uniformly encapsulated in the SePAN *** unique structure of SnSe2-SePAN not only relieves drastic volume variation but also guarantees the structural integrity of the composite,endowing SnSe2-SePAN with excellent sodium/potassium storage ***,SnSe2-SePAN displays a high sodium storage capacity and excellent feasibility in a wide working temperature range(-15 to 60℃:300 mAh g^(-1)/700 cycles/-15℃;352 mAh g^(-1)/100 cycles/60℃at 0.5 A g^(-1)).At room temperature,it delivers a record-ultralong cycling life of 192 mAh g^(-1)that exceeds 66000 cycles even at 15 A g^(-1).It exhibits extremely superb electrochemical performance in PIBs(157 mAh g^(-1)exceeding 15000 cycles at 5 A g^(-1)).The ex situ XRd and TEM results attest the conversion-alloy mechanism of ***,computational calculations verify that SePAN takes an important role in intensifying the electrochemical performance of SnSe2-SePAN ***,this study breaks new ground on solving the polyselenide dissolution issue and improving the wide temperature workable performance of sodium/potassium storage.

关键词： anode energy storage SnSe2-SePAN composite sodium/potassium-ion batteries widetemperature range

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EC-QCL中红外激光外差光谱遥测技术研究

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光谱学与光谱分析 2023年第6期43卷 1739-1745页

作者：沈凤娇谈图卢军张胜高晓明陈卫东合肥学院先进制造工程学院安徽合肥230601 中国科学院合肥物质科学研究院安徽光学精密机械研究所安徽合肥230031 laboratoire de Physico-Chimie de l’Atmosphère Universitédu Littoral C te d’OpaleDunkerque59140France

具有高灵敏度、高光谱分辨率的中红外激光外差光谱气体探测,是以窄线宽激光器作为本地振荡器,通过放大入射的微弱吸收信号,实现大气痕量气体柱浓度和垂直浓度廓线的遥感探测技术。基于当前的激光外差辐射计,提出了一种新型的仪器结构。... 详细信息

具有高灵敏度、高光谱分辨率的中红外激光外差光谱气体探测,是以窄线宽激光器作为本地振荡器,通过放大入射的微弱吸收信号,实现大气痕量气体柱浓度和垂直浓度廓线的遥感探测技术。基于当前的激光外差辐射计,提出了一种新型的仪器结构。引入直接吸收光谱系统实现外差系统工作波长的选定和频率标定。采用紧凑型红外黑体源EMIRS200作为宽带辐射光源,替代太阳光,进行激光外差系统的验证分析。为激光外差辐射计的下一步系统集成提供了新方法。研制了中红外宽调谐激光外差辐射计概念验证系统,对系统基本参数进行了测试分析。该系统采用8μm外腔量子级联激光器(EC-QCL)作为本地振荡光源,红外黑体源EMIRS200作为辐射光源。通过对该系统基本参数的测试数据分析,获得了系统信噪比(~120)和外差转换效率(~0.006)参数。利用艾伦方差分析确定了EC-QCL的稳定时间至少达到了133 s,因此非常适合于激光外差光谱的采集。得到直接吸收光谱系统的1σ最小体积分数探测限为2.312×10^(-8),能够满足大气甲烷高灵敏检测需求,同时实现外差系统工作波长的选定和频率标定。最后利用已建立的激光外差辐射计概念验证系统获取了甲烷中红外8μm处高分辨激光外差吸收光谱,并与甲烷在8μm波段附近的直接吸收光谱进行了光谱比对。最后拟合了系统光谱分辨率参数,验证了该概念验证系统的高光谱分辨率,能满足较窄线宽条件下的高分辨率激光外差光谱的测量。实验结果表明,激光外差系统中引入直接吸收光谱系统可以实现外差系统工作波长的选定和频率标定。紧凑型红外黑体源EMIRS200可以用于激光外差辐射计的结构优化,实现激光外差系统的分析验证,为进一步应用于测量实际大气中多组分气体的光谱提供了实验基础并拓展激光外差辐射计在高精度遥感探测领域的应用。

关键词：大气遥感外腔量子级联激光器中红外激光外差

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Solar chemical looping reforming of methane combined with isothermal H2O/CO2 splitting using ceria oxygen carrier for syngas production

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Journal of Energy Chemistry 2020年第2期29卷 60-72页

作者： Srirat Chuayboon Stéphane Abanades Sylvain Rodat Processes Materials and Solar Energy LaboratoryPROMES-CNRSFont-Romeu 66120France department of Mechanical Engineering King Mongkut's Institute of Technology LadkrabangPrince of Chumphon CampusChumphon 86160Thailand Universite Grenoble Alpes Le-Bourget-du-Lac F-73375France CEA-LJTEN laboratoire des Systemes Solaires Haute Temperature(LSHT) Grenoble F-38054France

The chemical looping reforming of methane through the nonstoichiometric ceria redox cycle(CeO2/CeO2-δ) has been experimentally investigated in a directly irradiated solar reactor to convert both solar energy and methane to syngas in the temperature range 900–1050 °C. Experiments were carried out with different ceria shapes via two-step redox cycling composed of endothermic partial reduction of ceria with methane and complete exothermic re-oxidation of reduced ceria with H2 O/CO2 at the same operating temperature, thereby demonstrating the capability to operate the cycle isothermally. A parametric study considering different ceria macrostructure variants(ceria packed powder, ceria packed powder mixed with inert Al2 O3 particles, and ceria reticulated porous foam) and operating parameters(methane flow-rate, reduction temperature, or sintering temperature) was conducted in order to unravel their impact on the bed-averaged oxygen non-stoichiometry(δ), syngas yield, methane conversion, and solar reactor performance. The ceria cycling stability was also experimentally investigated to demonstrate repeatable syngas production by alternating the flow between CH4 and H2 O(or CO2). A decrease in sintering temperature of the ceria foam was beneficial for increasing syngas selectivity, methane conversion,and reactor performance. Increasing both CH4 concentration and reduction temperature enhanced δ with the maximum value up to 0.41 but concomitantly favored CH4 cracking reaction. The ceria reticulated porous foam showed better performance in terms of effective heat transfer, due to volumetric absorption of concentrated solar radiation and uniform heating with lower solar power consumption, thereby promoting the solar-to-fuel energy conversion efficiency that reached up to 5.60%. The energy upgrade factor achieved during cycle was up to 1.19. Stable patterns in the δ and syngas yield for consecutive cycles with the ceria foam validated material performance stability.

关键词： Chemical looping Methane reforming Ceria structure Concentrated solar power Syngas production H2O/CO2 splitting

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纤维对PEI改性环氧树脂单向复合材料形态的影响(英文)

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华南理工大学学报（自然科学版） 2003年第1期31卷 1-7页

作者： L.Bonnaud 赵建青贾德民 J.P.Pascaul H.Sautereau 华南理工大学材料科学与工程学院广东广州510640 laboratoire des Matériaux Macromoléculaires

人们改善环氧树脂基复合材料的脆性通常只改善环氧树脂基体和增强纤维间的界面 .提高环氧树脂韧性的另一种常用方法是添加初始相容性良好的热塑性树脂如聚醚酰亚胺 ,在某一转化率 (取决于体系的组成和反应温度 )时体系发生相转变 .体系... 详细信息

人们改善环氧树脂基复合材料的脆性通常只改善环氧树脂基体和增强纤维间的界面 .提高环氧树脂韧性的另一种常用方法是添加初始相容性良好的热塑性树脂如聚醚酰亚胺 ,在某一转化率 (取决于体系的组成和反应温度 )时体系发生相转变 .体系最终的形态由相转变速率和环氧树脂反应速率所控制 .本文作者研究了两种增强纤维 (玻璃纤维和碳纤维 )对不同环氧树脂 /聚醚酰亚胺体系形态形成的影响 .结果发现体系中纤维的存在不会影响基体相分离过程 ,但会改变体系的最终形态 ;形态的变化与纤维的品种关系不大 ;

关键词： PEI 改性环氧树脂热塑性增韧热固性树脂纤维增强复合材料聚醚酰亚胺脆性材料形态

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超强飞秒激光脉冲在空气中的传输研究

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量子电子学报 2006年第3期23卷 282-294页

作者：张杰郝作强远晓辉郑志远张喆俞进鲁欣奚婷婷王兆华仲佳勇金展刘运全令维军赵卫魏志义中国科学院物理研究所光物理重点实验室 laboratoire de Spectrométric Ionique et Moléculaire 中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室

对超强飞秒激光在空气中传输形成等离子体通道进行了系统研究。空气中长等离子体通道的形成主要是由于光学克尔自聚焦效应,等离子体散焦作用和光束衍射之间达到了动态平衡,使超强飞秒激光脉冲在空气中形成数百米长甚至千米量级长度的等... 详细信息

对超强飞秒激光在空气中传输形成等离子体通道进行了系统研究。空气中长等离子体通道的形成主要是由于光学克尔自聚焦效应,等离子体散焦作用和光束衍射之间达到了动态平衡,使超强飞秒激光脉冲在空气中形成数百米长甚至千米量级长度的等离子体通道。我们发展了通道的四种主要诊断方法:声学诊断、荧光探测、电阻率测量和横截面成像方法,这几种方法各有优势,可以互为补充．研究了通道同时伴随的三次谐波辐射,三次谐波具有与基频激光相似的变化规律。从应用角度出发,我们对通道内细丝进行了优化控制,对通道寿命的延长进行了研究,使通道寿命达到了微秒量级。改变激光脉冲的初始啁啾,得到了更远距离处的稳定成丝分布,和最优化的超连续光谱产生,此外,还介绍了激光诱导高压放电的应用研究。

关键词：激光技术等离子体通道能量背景通道寿命三次谐波高压放电

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Statistical properties of kinetic-scale magnetic holes in terrestrial space

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Earth and Planetary Physics 2021年第1期5卷 63-72页

作者： ShuTao Yao ZongShun Yue QuanQi Shi Alexander William degeling HuiShan Fu AnMin Tian Hui Zhang Andrew Vu RuiLong Guo ZhongHua Yao Ji Liu Qiu-Gang Zong XuZhi Zhou JingHuan Li WenYa Li HongQiao Hu YangYang Liu WeiJie Sun Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai Shandong 264209China State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China School of Space and Environment Beihang UniversityBeijing 100191China Physics department and Geophysical Institute University of Alaska FairbanksFairbanksAK99775USA Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China laboratoire de Physique Atmosphérique et Planétaire STAR InstituteUniversitéde LiègeLiègeB-4000Belgium School of Earth and Space Sciences Peking UniversityBeijing 100871China SOA Key Laboratory for Polar Science Polar Research Institute of ChinaShanghai 200136China department of Climate and Space Sciences and Engineering University of MichiganAnn ArborMI48109USA

Kinetic-scale magnetic holes(KSMHs)are structures characterized by a significant magnetic depression with a length scale on the order of the proton *** structures have been investigated in recent studies in near-Earth space,and found to be closely related to energy conversion and particle acceleration,wave-particle interactions,magnetic reconnection,and turbulence at the ***,there are still several major issues of the KSMHs that need further study—including(a)the source of these structures(locally generated in near-Earth space,or carried by the solar wind),(b)the environmental conditions leading to their generation,and(c)their spatio-temporal *** this study,KSMHs in near-Earth space are investigated statistically using data from the Magnetospheric Multiscale *** 200,000 events were observed from September 2015 to March *** rates of such structures in the solar wind,magnetosheath,and magnetotail were *** find that KSMHs occur in the magnetosheath at rates far above their occurrence in the solar *** indicates that most of the structures are generated locally in the magnetosheath,rather than advected with the solar ***,KSMHs occur in the downstream region of the quasi-parallel shock at rates significantly higher than in the downstream region of the quasi-perpendicular shock,indicating a relationship with the turbulent plasma *** to the magnetopause,we find that the depths of KSMHs decrease as their temporal-scale *** also find that the spatial-scales of the KSMHs near the subsolar magnetosheath are smaller than those in the ***,their global distribution shows a significant dawn-dusk asymmetry(duskside dominating)in the magnetotail.

关键词： kinetic scale magnetic hole magnetic dip electron vortex turbulence

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Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser

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Light(Science & Applications) 2021年第12期10卷 2531-2540页

作者： J.Riepl J.Raab P.Abajyan H.Nong J.R.Freeman L.H.Li E.H.Linfield A.G.davies A.Wacker T.Albes C.Jirauschek C.Lange S.S.dhillon R.Huber department of Physics University of RegensburgRegensburgGermany laboratoire de Physique de l’Ecole Normale Supérieure ENSUniversitéPSLCNRSSorbonne UniversitéUniversitéde ParisParisFrance School of Electronic and Electrical Engineering University of LeedsWoodhouse LaneLeedsUK Mathematical Physics and NanoLund Lund UniversityLundSweden department of Electrical and Computer Engineering Technical University of MunichMunichGermany department of Physics TU Dortmund UniversityDortmundGermany

The exploitation of ultrafast electron dynamics in quantum cascade lasers(QCLs)holds enormous potential for intense,compact mode-locked terahertz(THz)sources,squeezed THz light,frequency mixers,and comb-based metrology *** the important sub-cycle dynamics have been notoriously difficult to access in operational THz ***,we employ high-field THz pulses to perform the first ultrafast two-dimensional spectroscopy of a free-running THz *** incoherent and coherent nonlinearities up to eight-wave mixing are detected below and above the laser *** data not only reveal extremely short gain recovery times of 2 ps at the laser threshold,they also reflect the nonlinear polarization dynamics of the QCL laser transition for the first time,where we quantify the corresponding dephasing times between 0.9 and 1.5 ps with increasing bias currents.A density-matrix approach reproducing the emergence of all nonlinearities and their ultrafast evolution,simultaneously,allows us to map the coherently induced trajectory of the Bloch *** observed high-order multi-wave mixing nonlinearities benefit from resonant enhancement in the absence of absorption losses and bear potential for a number of future applications,ranging from efficient intracavity frequency conversion,mode proliferation to passive mode locking.

关键词： polarization mixer cycle

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