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耐硫催化剂上合成混合醇的研究 总被引:2,自引:1,他引:2
通过改进制备方法和添加助剂,用浸渍-热分解法制得了具有高活性和高选择性的MoS2-K-C型耐硫低碳混合醇催化剂。在8.0-11.0MPa,290-340℃,6000-12000h^-1,H2 S 浓度为100ppm 左右的条件下,在直流反应器中对催化剂进行了性能测试,结果表明,醇得率为0.14-0.47gROH(gcat·h)^-1,选择性为89-98%。同时,考察了操作条件对催化剂性能的影响。1042h的试验,证明催化剂具有很好的稳定性。 相似文献
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QU Yi-chun JING Li-qiang WANG Wen-xin FU Hong-gang LIU Yang Key Laboratory of Functional Inorganic Materials Chemistry Ministry of Education School of Chemistry Materials Science Heilongjiang University Harbin P. R. China 《高等学校化学研究》2011,27(1):1-5
Nanocrystalline anatase TiO2 films with indium tin oxide(ITO) coated glass as the film substrate were fabricated through spin-coating technique. The TiO2 pastes were prepared with sodium dodecylbenzenesulfonate(DBS) modified TiO2 nanocrystals, synthesized by sol-hydrothermal processes in advance, together with different amounts of polyethylene glycol(PEG) macromolecules. The as-prepared films were mainly characterized by ultraviolet-visible (UV-Vis) spectroscopy, field emission scanning electron microscopy(... 相似文献
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HOU Ying SHI Zhan YANG Ming LI Guang-hua FENG Shou-hua State key Laboratory of Inorganic Synthesis Preparative Chemistry College of Chemistry Jilin University Changchun P. R. China 《高等学校化学研究》2005,21(4):406-410
IntroductionThe syntheses of metal-organic coordination poly-mers have been attracting increasing attention owing tothe potential applications of their functional materials incatalysis,non-linear optics,magnetism sensors andmolecular recognition[1—7].Coordination polymers crys-tallized from polyaromatic acids and metal-ions are ofgreat interest for their polymeric structures and porousproperties[8—12].Their network topologies based on mo-lecular building blocks are usually controlled and mod… 相似文献
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目前有大量关于全程电荷匹配设计肽的应用的研究,但是关于半程电荷匹配设计肽作为药物的应用研究却未见报道.本文对新型设计的半程电荷匹配肽P9(AC-Pro-Ser-Phe-Asn-Phe-Lys-Phe-Glu-Pro-NH2)的研究发现,P9可以成功地将作为疏水药物模型的芘稳定悬浮于水溶液中.大豆卵磷脂微囊被用以模拟细胞膜.荧光数据显示芘可以借助P9的包埋作用以晶体状态存在于水溶液中.并且当包埋体加入到脂质体微囊体系中时,芘可以从P9的包埋体系中以分子形态释放到膜的脂质层内.实验发现当包埋于芘上的P9较多,包埋壁较厚,芘的释放速度相对变缓.我们可以利用这一特性,通过调节加入的P9的浓度来控制包埋于芘上P9的厚度,从而控制芘的释放速率.研究表明,具有半程电荷匹配性质的P9肽可以作为运载疏水药物的载体. 相似文献
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WEI Yingxu ZHANG Dazhi LIU Zhongmin a SU Bao-Lian b Dalian National Laboratory for Clean Energy National Engineering Laboratory for Methanol-to-Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning China Laboratory of Inorganic Materials ChemistryCMI University of NamurFUNDP rue de Bruxelles B- Namur Belgium State 《催化学报》2012,(1):2022-2032
Rational and efficient conversion of methane to more useful higher hydrocarbons is one of the most important topics of natural gas utilization.Although methane activation and its conversion to valuable compounds attract an increasing attention,methane conversion is often made in indirect way through the very energy-consuming step for syngas production from steam reforming of methane.Some promising results appeared to be of significance for the development of an alternative and potential route for the production of high value-added products from methane.Efficient conversion of methane to higher hydrocarbons could be realized via methyl halide as the intermediate.After the production of halomethane,they could be transformed to gasoline and light olefins over modified zeolites and SAPO molecular sieves.High conversion efficiency and selectivity indicated the feasibility of industrial application.The research gained recently growing interest from the point of view in both fundamental research and industrial application.The study on the reaction mechanism shed light on the possible route of C-C bond construction from methyl halide,which is the very important issue of the C1-reactant conversion to higher hydrocarbons.Hydrogen halide generation during methyl halide conversion did not exert apparent impact on the reaction mechanism and the structure stability of the catalysts.This review deals with the evolution of the field and comments the advantages to be explored and the drawbacks to be prevented for the development of new and sustainable methane-to-olefins(MTO) and methane-to-gasoline(MTG) routes via methyl halides. 相似文献
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An attempt was made to prepare nanographite with uniform size by pyrolysis of 4-methyl pyridine (MPy), which is the structure-directing agent for the formation of GaPO4-LTA single crystals, in the GaPO4-LTA framework at 760 ℃. The as-prepared nanographite has been examined by Raman spectroscopy, transmission electron microscopy (TEM), electron spin resonance (ESR) and magnetization characterizations. The TEM image shows that the size of individual nanographite particles is about 7 nm, and it is proved that there are spins of sp^2-type (π-type) radical electrons localized on the zigzag edge sites of the nanographite. The magnetic susceptibility of the nanographite shows crossover from a high-temperature diamagnetic to a low-temperature paramagnetic behavior, in good agreement with the theoretical expectation. 相似文献
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Introduction Thesynthesisofmetal organicpolymershasundoubt edlybeenatopicofspecialinterestduetotheirhost guestinteractionswhichhavebeentailoredtoavarietyofindus trialprocessessuchascatalysis ,adsorptionandgassepa ration .1 5Sofar ,manyeffortshavebeendedicatedtotheexplorationofmetal organicframeworkmaterialsbuiltupfrommetallicclustersandrigidorganicbuildingblocks .Thisstrategy ,asreportedbythegroupsofRobson ,6Yaghi7 11andothers ,utilizesrigidorganiclinkersfordi rectlylinkingthemetalclusters… 相似文献
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Zhi Hong JIA Hai Quan SU Shou Hua FENG Chun Shan SHI* Key Laboratory of Rare Earth Chemistry Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Key Laboratory of Inorganic Hydrothermal Synthesis 《中国化学快报》2001,(11)
Perovskite complex fluorides have attracted great interests due to their particular physical properties such as antiferromagnetic characteristics1, photoluminescence behavior2. Complex fluorides are usually prepared by solid state reactions at high-temperature. In spite of inert atmosphere, it is inevitable to contain a bit of oxygen. This has great effect on the luminescent character of rare earth ions. There are also reports about synthesizing some binary fluorides by high-temperature hy… 相似文献
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Tailor and Control of Acidic Strength in Ordered Mesoporous Aluminosilicates by Using Preformed Zeolite Precursors 总被引:1,自引:0,他引:1
The acidic strength of ordered mesoporous aluminosilicates of MAS-2, MAS-3, MAS-7 and MAS-9 and microporous crystals of Y, L, beta, and ZSM-5 zeolites was systemically investigated by temperature-programmed desorption of ammonia (NH3-TPD). Due to the use of preformed zeolite precursors of Y, L, beta and ZSM-5, the ordered mesoporous aluminosilicates with distinguished acidic strength were obtained, being dependent on the type of preformed zeolite precursors. Therefore, the acidic strength of these mesoporous aluminosilicates could be tailored and controlled. 相似文献