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Chinese Journal of Structural Chemistry 2004年第6期23卷 507-510页

作者：袁建莉王静梅陈芬儿 Department of Chemistry Fudan University Shanghai 200433 China Research Center for Analysis and Measurement Fudan University Shanghai 200433 China

The intermediate of d-biotin, (3aS,6aR)-1,3-dibenzyltetrahydro-1H-thieno[3,4- d]-imidazole-2(3H)-one-4-ylidenepentanoil acid was synthesized from (3aS,6aR)-1,3-dibenzylte- trahyro-4H-thieno[3,4-d]-imidazole-2,4(1H)-dione by using the Grignard reaction. The structure of 3 was characterized by IR, 1H NMR and MS, and the absolute configuration was further confirmed by X-ray crystal structure analysis. Compound 3 crystallizes in monoclinic, space group P21 with a = 11.030(2), b = 7.783(2), c = 12.797(2) , b = 93.44(1)o, Z = 2, Mr = 422.53 (C24H26N2O3S), V = 1096.3(6) 3, = 0.177 mm-1, Dc = 1.280 g/cm3, F(000) = 448 and T = 293(2) K. The final R = 0.0737 and Rw = 0.1974 for 1009 observed reflections with I >2s(I).

关键词： Grignard reaction, synthesis X-ray crystal structure

Dynamic Kinetics of Methanol Synthesis over a Commercial Copper-Based Catalyst

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Chinese Journal of chemical Engineering 2000年第4期8卷 315-320页

作者：陈晓春李成岳饶国瑛 College of chemical Engineering Beijing Univ. of Chemical Technology Beijing 100029 China

Adsorption, surface reaction and process dynamics on the surface of a commercial copper-based catalyst for methanol synthesis from CO/CO2/H2 were systematically studied by means of temperature programmed desorption (TPD), temperature programmed surface reaction (TPSR), in-situ Fourier transform-inferred spec-troscopy(FTIR) and stimulus-response techniques. As a part of results, an elementary step sequence was suggested and a group of ordinary differential equations (ODEs) for describing transient conversations relevant to all species on the catalyst surface and in the gas phase in a micro-fixed-bed reactor was derived. The values of the parameters referred to dynamic kinetics were estimated by fitting the solution of the ODEs with the transient response data obtained by the stimulus-response technique with a FTIR analyzer as an on-line detector.

关键词： methanol synthesis copper-based catalyst dynamic kinetics elementary step sequence parameter estimation

STUDY ON DEACTIVATION OF POTASSIUM-PROMOTED COBALT-MOLYBDENUM/ALUMINA WATER-GAS SHIFT CATALYST

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Journal of Energy Chemistry 1994年第3期 295-305页

作者： LI Xiao-Ding CHEN Jing-Shong LI Yao-Hui LU Xiao-Wan KONG Yu-HuaHubei Research Institute of Chemistry Wuhan, Hubei, 430074

The deactivation of a potassium-promoted CoMoK/AlOCatalystwas investigated by means of XRD,XRF,XPS,ICP,FT-IR *** resultsshow that the reaction Pressure,deposition of Cland the formation sulfateslead deactivation of the *** effect of impurities was studied systemati-cally with both qualitative and quantitative *** way to resolve thedeactivation of CoMoK/AlOwas discussed.

关键词： Chen CO MO XRF GAS STUDY ON DEACTIVATION OF POTASSIUM-PROMOTED COBALT-MOLYBDENUM/ALUMINA WATER-GAS SHIFT CATALYST XPS

Inorganic shell nanostructures to enhance performance and stability of metal nanoparticles in catalytic applications

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Rare Metals 2020年第7期39卷 767-783页

作者： Inhee Choi Hyeon Kyeong Lee Gyoung Woo Lee Jiyull Kim Ji Bong Joo Department of Life Science University of SeoulSeoul 02504Republic of Korea Division of chemical Engineering Konkuk UniversitySeoul 05029Republic of Korea

In this article,we review the recent progress and our research activity on the synthesis of inorganic shell nanostructures to enhance the catalytic performance and stability of metal nanoparticles in catalytic ***,we introduce general synthetic strategies for the fabrication of inorganic nanoscale shell layers,including template-assisted sol-gel coating,hydrothermal(or solvothermal)synthesis and the self-templating *** also discuss recent examples of metal nanoparticles(NPs)with nanoscale shell layers,namely core-shell,yolk-shell and multiple NPs-embedded nanoscale *** then discuss the performance and stability of metal particles in practical catalytic ***,we conclude with a summary and perspective on the further progress of inorganic nanostructure with nanoscale shell layers for catalytic applications.

关键词： Nanostructures Inorganic shell Metal nanoparticle Stabilization Performance enhancement Catalyst

Discovery of potassic spilite (or poenite) in Langshan Group of Tanyaokou District,Inner Mongolia,China

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Chinese Science Bulletin 1999年第6期44卷 563-567页

作者： PENG RunminDepartment of Geology and Mineral Resources , China University of Geosciences, Beijing 100083, China Department of Geology and Mineral Resources China University of Geosciences Beijing China

It is believed that the albite-potash-feldspar-greenschists in the middle Proterozoic Langshan Group in Tanyaokou District are synsedimentary potassic spilite （or poenite） based on the following facts and features: （ ⅰ ） they occur in beds and look blackish （or apple） green and compact; （ ⅱ ） they bear blasto-glomeroporphyritic and blastocrystalloclastic crystals which consist of （altered） albite laths with hollow skeleton crystal texture in which there are slender dark strips and minor pyroxene, and blasto-amygdaloid filled with pyrite, chlorite, magnetite, etc.; （ ⅲ ） the results of the petrochemical diagrams show that they are orthometamorphites; （ Ⅳ ） Sm-Nd isotopic age of them is 1 824 Ma (model age (tDM) is 2 006—2 132 Ma).

关键词： potassic spilite (or poenite) middle Proterozoic Tanyaokou Deposit Inner Mongolia.

PREPARATION AND CHARACTERIZATION OF BIMETALLIC Pd-Fe/Al2O3 CATALYSTS—CHARACTERIZATION BY INFRARED SPECTROSCOPY AND X-RAY DIFFRACTION

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Journal of Energy Chemistry 1994年第1期 1-12页

作者： XIAO Tian-Cun AN Li-Dun TANG Ai-Hua XU Xian-LunLanzhou histitute of chemical Physics Academia Sinica Lanzhou, Gansu 730000

Series of bimetallic catalysts Pd-Fe/AlOwith various palladiumand iron contents were prepared by impregnating metal precursors in *** were employed to characterize the catalysts,XRD forthe existing form of the supported metals,XPS for the surface metal contentsand chemical states,in silu IR with the aid of CO as a probe molecule for theinfluence of iron amount and adding sequence upon the dispersion and the elec-tronic state of *** the catalyst prepared by coimpregnating,the pal-ladium and iron contents are higher than those prepared by impregnating in dif-ferent sequence,but the ratio of Pd/Fe（in atom）is lower than those on thelatter *** iron atoms shield the palladium and enhance the dispersity *** the catalyst prepared by first impregnating with iron and thenwith palladium,the iron has a strong ability to disperse palladium and the dis-persity increases with the iron *** the catalyst prepared by first dopingwith palladium and then iron,the

关键词： Pd CHARACTERIZATION BY INFRARED SPECTROSCOPY AND X-RAY DIFFRACTION PREPARATION AND CHARACTERIZATION OF BIMETALLIC Pd-Fe/Al2O3 CATALYSTS Fe Al

PREPARATION AND CHARACTERIZATION OF BIMETALLIC Pd-Fe/Al2O3 CATALYSTS—CHARACTERIZATION BY TEM,EDX,XPS and ESR

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Journal of Energy Chemistry 1994年第1期 13-23页

作者： XIAO Tian-Cun AN Li-Dun TANG Ai-HuaLI Shehg-Li XU Xian-LunLanzhou Institute of chemical Physics, Academia Sinica Lanzhou, Gansu 730000

Suppurted bimetallic catalysts Pd-Fe/AlOwere prepared by im-pregnating method in different dipping *** electron mi-croscopy（TEM-EDX）,X-ray diffraction（XRD）,X-ray photoelectron spec-troscopy（XPS）and electron spin resonance（ESR）were employed to charac-terize the *** is shown that the impregnating sequence has influence onthe diffusiun and distribution of the metals in the pores of *** group diffusion is controlled by its *** the surface of the cata-lysts,the iron is in oxidative state while the palladium is zerovalent whenFeClis first ***,on the surface of the other two,the palladiumis in both oxidated and metallic *** amount of Fein the catalyst dif-fers with the dipping *** results shows that in different catalystsprepared in various sequences Feexists in different environments.

关键词： Pd PREPARATION AND CHARACTERIZATION OF BIMETALLIC Pd-Fe/Al2O3 CATALYSTS CHARACTERIZATION BY TEM,EDX,XPS and ESR Fe TEM EDX XPS Al

EFFECT OF RARE EARTH METALS ON Cu-BASED LOW ALCOHOL SYNTHESIS CATALYSTS

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Journal of Energy Chemistry 1995年第2期 178-185页

作者： KANG Hui-Min CHEN Bao-ShuWANG Da-Xiang KANG Xi-Hui ZHAO Jiu-Shengchemical Engineering Department, Tianjin University Tuianjin 300072

Rare earth metals （RE metal ） such as La and Ce are selected aspromoters in the Cu-based low alcohol synthesis catalysts. Their effects on thecatalyst structure and performance are studied. Promoters La and Ce have thetrend to form a network-like structure on the catalyst surface with result ofstabilizing the Cu crystallites on it and prohibiting them from sintering at hightemperature. RE metal has also the property of compensating the decreasingeffect of promoter potassium on its surface area. As a result, the introductionof RE metul to the Cu-based low alcohol synthesis catalyst can improve itsthermal stability and increase its selectivity to Calcohols.

关键词： catalysts low alcohols rare earth metals

KINETICS OF METHANOL SYNTHESIS IN THE PRESENCE OF C301 Cu-BASED CATALYST (Ⅱ) EFFECTIVENESS FACTORS OF PARALLEL REACTIONS*

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Chinese Journal of chemical Engineering 1989年第2期 258-263页

作者：钟娅玲朱炳辰房鼎业姚佩芳 East China University of chemical Technology Shanghai

For multiple reaction system of methanol synthesis in the presence of Cu-based catalyst, hydrogenation reactions of CO and CO2 are selected as key reactions. A diffusion model, taking CO and CO2 as key components, is presented for the calculation of the intraparticle effectiveness factors of the two parallel key reactions over C301 Cu-based catalyst. Numerical solutions of the effectiveness

关键词： hydrogenation methanol hydrolysis Pellet cylindric listed ordinary radius absolute intrinsic

KINETICS OF METHANOL SYNTHESIS IN THE PRESENCE OF C301 Cu-BASED CATALYST (Ⅰ) INTRINSIC AND GLOBAL KINETICS*

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Chinese Journal of chemical Engineering 1989年第2期 248-257页

作者：宋维端王弘轼张均利房鼎业孙启文朱炳辰朱明交 East China University of chemical Technology Shanghai

The intrinsic and global kinetics of methanol synthesis from carbon monoxide, carbon dioxide and hydrogen in the presence of C301 commercial catalyst is studied. The investigation is performed under typical commercial... 详细信息

关键词： methanol monoxide kinetics intrinsic dioxide outlet inlet earlier agree negligible