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超深度脱硫纳米钼基硫化物催化剂的合成、反应及表征

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超深度脱硫纳米钼基硫化物催化剂的合成、反应及表征

Environmental photocatalysis:Perspectives for China

第五届全国环境催化与环境材料学术会议

作者：蒋宗轩 P.Afanasiev B.Jouguet M.Vrinat 李灿中国科学院大连化学物理研究所催化基础国家重点实验室 institutde recherches surla catalyse 69626 VilleurbanneFrance institutde recherches surla catalyse 69626 VilleurbanneFrance institutde recherches surla catalyse 69626 VilleurbanneFrance 中国科学院大连化学物理研究所催化基础国家重点实验室

本研究在比较温和的反应条件下（低于200oC,常压）,采用化学还原的方法合成了纳米体相钼基硫化物催化剂。研究结果表明,在纳米体相钼基硫化物催化剂中Mo/S原子比可以通过改变合成条件（钼前体、反应温度、反应时间等）加以控制。采用低... 详细信息

本研究在比较温和的反应条件下（低于200oC,常压）,采用化学还原的方法合成了纳米体相钼基硫化物催化剂。研究结果表明,在纳米体相钼基硫化物催化剂中Mo/S原子比可以通过改变合成条件（钼前体、反应温度、反应时间等）加以控制。采用低温氮吸附、X-光衍射（XRD）、程序升温还原（TPR）以及扫描及透射电镜（SEM、TEM）对合成的催化剂进行了一系列表征,并用模型含硫分子（噻吩、二苯并噻吩、4,6-二甲基二苯并噻吩）以及真实油品对合成的催化剂的加氢脱硫性能进行了评价。

关键词：超深度脱硫催化剂纳米硫化物柴油

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Science China Chemistry 2010年第9期53卷 1831-1843页

作者： HERRMANN Jean Marie Institut de recherches sur la catalyse et l'Environnement de Lyon UMR 5256 CNRS/Université Lyon1 2 Av.Albert Einstein 69626 Villeurbanne Cedex

Photocatalysis is based on the double aptitude of the photocatalyst(essentially titania) to simultaneously adsorb reactants and absorb efficient *** photocatalysis is able to be efficient in Fine,"Green" and Environmental *** induces mild oxidations in the absence of water by generating active neutral atomic O* *** instance,the oxidation of 4-tert-butyl-toluene is 100% selective in *** water treatment,many toxic inorganic ions are oxidized in their harmless upper oxidized *** elimination of organic pollutants is the main field of water photocatalytic *** of aliphatic and aromatic pollutants are totally mineralized into CO2 and innocuous inorganic *** complex molecules,such as pesticides(herbicides,insecticides,fungicides,etc.) or dyes,are totally *** example of green chemistry is the total degradation of dyes in water,in particular for the azo-dyes,with 100% selective degradation of -N=N-azo-groups into *** is also active in the "bio-world" by killing bacteria(***,streptococcus,etc.) in water without *** pollutants can also be destroyed,especially all the VOC's(volatile organic compounds),providing certain air humidity enabling titania to produce cracking OH* *** chemical engineering reasons,the photocatalyst has to be fixed on a photo-inert *** these conditions,UV-irradiated titania-based photocatalysis could be applied to the elimination of air pollutants,VOC's,solvents,odors,chemicals,*** treatment has to be associated with water and solid waste treatment because of *** is conducted by covering water treatment ponds or lagunas by rafts on which large sheets of Ahlstrom paper are deposited,supporting titania associated with activated ***,virus AH5N2,a model virus close to H5N1,responsible for the avian flu could be totally *** is directly connected wi

关键词： photocatalysis green chemistry environmental chemistry air pollutants water pollutants solar energy China

Crystal structure and infrared spectrum of thallium holmium polyphosphate, TlHo(PO_3)_4

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Journal of Rare Earths 2008年第6期26卷 765-769页

作者： Karima Horchani-Naifer Jaouher Amami Mokhtar Férid Unité de recherches de Matériaux de Terres Rares Centre National de Recherches en Sciences des Matériaux

Crystals of thallium-holmium polyphosphate T1Ho（PO3）4 were grown by flux method technique and characterized by single crystal X-ray diffraction. Structure of T1Ho（PO3）4 was solved for the first time, and it crystallized in the monoclinic P21/n space group with the following unit-cell dimensions： a=1.02225（3） nm, b=0.88536（2） nm, c=1.09541（4） nm, β=105.888（1）°, V=0.95354（5） nm^3 and Z=4. The crystal structure was solved from 2174 independent reflections with final R1（F^2）=0.0442 and Rw（F^2）=0.0861 refined with 164 parameters. The atomic arrangement could be described as a long chain polyphosphate organization. Holmium atoms had eightfold coordination. The structure of T1Ho（PO3）4 consisted of HoO8 polyhedra sharing oxygen atoms with phosphoric group PO4. Infrared spectrum was investigated at room temperature in the frequencies range, 350--4000 cm^-1, showing some characteristic vibration bands of infinite chain structure of PO4 tetrahedra linked by bridging oxygen.

关键词： polyphosphate holmium crystal structure infrared spectroscopy rare earths

硫化态PtMo/γ-Al_2O_3催化剂活性位的低温CO-FTIR方法表征及噻吩HDS活性的研究

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高等学校化学学报 2002年第7期23卷 1395-1399页

作者：齐兴义郭林李文钊辛勤 Michel Lacroix Michel Vrinat Francoise Mauge 北京航空航天大学材料科学与工程学院北京100083 中国科学院大连化学物理研究所大连116023 Institut de recherches surla catalyse Laboratoire catalyseet Spectrochimie

A series of sulfided PtMo/ γ Al 2O 3 catalysts[ w (Mo)=9.0%] with different contents of Pt were characterized by using low temperature FTIR spectroscopy of adsorbed CO, while their HDS activity was investigated with thiophene as a model substrate. Experimentally, it was found that no existence of the bands related to the surface complexes of Al 3+ ←CO and Pt 0←CO→Pt 0 was observed at 77 K and that the rate of the thiophene HDS reaction(573 K) is well linearly proportional to the area of the Pt 0←CO band at 2 093 cm -1 with a higher extrapolated HDS rate compared to that of sulfided Mo/ γ Al 2O 3 catalyst at the zero content of platinum. On the basis of the results here, the conclusion may be made that the active monolayer phase of Pt Mo S may be formed over sulfided PtMo/ γ Al 2O 3 catalysts during the sulfidation process and that both Mo 2+ and Pt 0 sites for CO adsorption should be the active reaction centers of thiophene HDS.

关键词：硫化态 PtMo/γ-Al2O3催化剂表征 HDS 低温CO-FTIR 噻吩加氢脱硫活性中心催化活性氧化铝负载铂钼催化剂

Why Is the Climate Forcing of Sulfate Aerosols So Uncertain?

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Advances in Atmospheric Sciences 2001年第6期18卷 1103-1120页

作者： Hu Rongming, Serge Planton, Michel Deque, Pascal Marquet and Alain Braun Centre national de recherches m t orologiques, Meteo-France Centre National de recherches Meteorologiques Meteo-France

Sulfate aerosol particles have strong scattering effect on the solar radiation transfer which results in increasing the planet albedo and, hence, tend to cool the earth-atmosphere system. Also, aerosols can act as the cloud condensation nuclei (CCN) which tend to increase the albedo of clouds and cool the global warming. The ARPEGE-Climat version 3 AGCM with FMR radiation scheme is used to estimate the direct and indirect radiative forcing of sulfate aerosols. For minimizing the uncertainties in assessing this kind of cooling effect, all kinds of factors are analyzed which have been mixed in the assessment process and may lead to the different results of the radiative forcing of aerosols. It is noticed that one of the uncertainties to assess the climate forcing of aerosols by GCM results from the different definition of radiative forcing that was used. In order to clarify this vague idea, the off-line case for considering no feedbacks and on-line case for including all the feedbacks have been used for assessment. The direct forcing of sulfate aerosols in off-line case is ?0.57 W/ m2 and ?0.38 W/ m2 for the clear sky and all sky respectively. The value of on-line case appears to be a little larger than that in off-line case chiefly due to the feedback of clouds. The indirect forcing of sulfate aerosols in off-line case is ?1.4 W/ m2 and ?1.0 W/ m2 in on-line case. The radiative forcing of sulfate aerosols has obvious regional characteristics. There is a larger negative radiative forcing over North America, Europe and East Asia. If the direct and indirect forcing are added together, it is enough to offset the positive radiative forcing induced by the greenhouse gases in these regions. Key words Radiative forcing - Feedback - Uncertainties - Sulfate aerosols

关键词： Radiative forcing Feedback Uncertainties Sulfate aerosols

Phenolic compounds removal by wet air oxidation based processes

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Frontiers of Environmental Science & Engineering 2018年第1期12卷 5-24页

作者： Linbi Zhou Hongbin Cao Claude Descorme Yongbing Xie School of Chemical Engineering ＆ Technology Tianjin University Tianjin 300072 China Division of Environmental Engineering and Technology Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Institut de recherches sur la catalyse et l＇environnement de Lyon （IRCELYON） CNRS 2 Avenue Albert Einstein 69626 Villeurbanne Cedex France

Wet air oxidation （WAO） and catalytic wet air oxidation （CWAO） are efficient processes to degrade organic pollutants in water. In this paper, we especially reviewed the WAO and CWAO processes for phenolic compounds degradation. It provides a comprehensive introduction to the CWAO processes that could be beneficial to the scientists entering this field of research. The influence of different reaction parameters, such as temperature, oxygen pressure, pH, stirring speed are analyzed in detail; Homogenous catalysts and heterogeneous catalysts including carbon materials, transitional metal oxides and noble metals are extensively discussed, among which Cu based catalysts and Ru catalysts were shown to be the most active. Three different kinds of the reactor implemented for the CWAO （autoclave, packed bed and membrane reactors） are illustrated and compared. To enhance the degradation efficiency and reduce the cost of the CWAO process, biological degradation can be combined to develop an integrated technology.

关键词： Wet air oxidationCatalytic wet air oxidationPhenolic compoundsHeterogeneous catalystsMechanism

Effect of hydration on the surface basicity and catalytic activity of Mg-rare earth mixed oxides for aldol condensation

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Journal of Rare Earths 2018年第4期36卷 359-366页

作者： Zheng Wang Pascal Fongarland Guanzhong Lu Wangcheng Zhan Nadine Essayem Key Laboratory for Advanced Materials and REsearch Institute of Industrial Catalysis School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Institut de recherches sur la catalyse et l'Environnement de Lyon(IRCELYON) CNRS-Universite Lyon 12 Avenue Albert Einstein69626 Villeurbanne CedexFrance

Magnesium and rare earth mixed oxides（Mg3 REOx（RE=La, Y. Ce）） were prepared and characterized by Xray diffraction（XRD）, N_2 adsorption-desorption, infrared spectra and microcalorimetry of CO_2. The results reveal that the Mg_3 CeO_x catalyst is present in the form of Mg-Ce-O solid solution,while the Mg3 LaOx and Mg_3 YO_x catalysts are probably rare earth oxides dispersed on MgO surface. As a result, among the calcined Mg_3 REO_x catalysts, the Mg_3 CeO_x catalyst presents the highest rate constant for acetone aldolization, which is well correlated to its more homogeneous distribution of basic sites. In contrary, the Mg_3 YO_x catalyst exhibit the lowest catalytic activity for acetone aldolization. Upon hydration pre-treatment, the basic properties on the surface of the Mg_3 REO_x catalysts were changed markedly. The Mg_3 YO_x catalyst after hydration treatment shows the highest amount of basic sites on catalyst surface, and then exhibits the highest activity among the hydrated Mg_3 REO_x catalysts. These results make it possible to fine-tune basic sites for acetone aldolization.

关键词： Mg-rare earth mixed oxide Hydration treatment Water tolerance Aldol condensation Solid base catalyst Rare earths

Synthesis and Crystal Structure of a New Potassium Yttrium Diphosphate Dihydrate KYP_2O_7·2H_2O

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Chinese Journal of Structural Chemistry 2008年第10期27卷 1199-1204页

作者： Férid M Horchani-Naifer K Unité de recherches de Matériaux de Terres Rares Centre National de Recherches en Sciences des MatériauxB.P.95 Hammam-Lif 2050Tunisie

The dihydrated potassium yttrium diphosphate, KYP2O7·2H2O, has been synthesized for the first time. Single-crystal XRD study has allowed the determination of its structure and correct formula. It crystallizes in the monoclinic system, space group P21/c, with the cell parameters a = 7.7069（3）, b = 10.5801（4）, c = 10.0204（5）A,β = 93.24（3）A, V= 815.76（6）A^3, Z= 4, Mr = 337.98, F（000） = 656, Dc = 2.752 g/cm^3 and/t = 8.073 mm^-1. The single-crystal structure was solved from 1856 unique reflections with the final R = 0.0365 and wR = 0.0772, refined with 119 parameters. The atomic arrangement of KYP2O7·2H2O is built by the P2O7 groups, the YO7 and the KO10 polyhedrons which are connected by corner and edge-sharing to form a three-dimensional framework. Water molecules are directly bonded to the Y and K atoms, and they are located in channels running along the a direction.

关键词： crystal structure yttrium diphosphate infrared spectrum TGA-DTA analysis

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噻吩加氢脱硫反应中NiMo催化剂的研究

石油化工 2004年第3期33卷 202-205页

作者：贾美林 P.Afanasiev M.Vrinat 李文钊徐恒泳葛庆杰中国科学院大连化学物理研究所辽宁大连116023 Institute de recherches sur la catalyse

采用连续流动微反装置,考察了催化剂载体、载体焙烧温度、催化剂制备方法及催化剂中Ni/Mo配比对NiMo催化剂催化噻吩加氢脱硫反应性能的影响,并用BET,XRD和TPR对催化剂进行了表征。结果表明,催化剂载体影响催化剂的性能,对于无Ni助剂的... 详细信息

采用连续流动微反装置,考察了催化剂载体、载体焙烧温度、催化剂制备方法及催化剂中Ni/Mo配比对NiMo催化剂催化噻吩加氢脱硫反应性能的影响,并用BET,XRD和TPR对催化剂进行了表征。结果表明,催化剂载体影响催化剂的性能,对于无Ni助剂的催化剂,负载在TiO2载体上的Mo催化剂活性高于负载在ZrO2上的催化剂,而助剂Ni的添加改变了活性顺序,使负载在TiO2载体上的NiMo催化剂活性低于负载在ZrO2上的催化剂;催化剂制备方法影响催化剂的性能,以共浸法制备的催化剂表现出高的催化活性;Ni/Mo配比影响催化剂的性能,当Ni/Mo摩尔比为0 6时,催化剂具有最高活性。

关键词： NiMo催化剂二氧化锆二氧化钛噻吩加氢脱硫