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催化剂加氢
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  catalysts for hydrogenation
     Studies on the Structure of Melt-Quenched Ni-Al Alloys and the Performance of Their Derived Raney-Ni Catalysts for Hydrogenation
     快凝Ni-Al合金结构及衍生骨架Ni催化剂加氢特性的研究
短句来源
     Study on the Crystallinity of ZGDMP and the Catalytic Activities of ZGDMP-Pd Catalysts for Hydrogenation
     结晶度对ZGDMP-Pd催化剂加氢活性的影响
短句来源
     The mechanisms of Pd/TiCh catalysts for hydrogenation were investigated according to the results of experiments.
     根据实验结果,对Pd/TiO_2催化剂加氢催化机理进行了探讨。
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  “催化剂加氢”译为未确定词的双语例句
     Effect of Mo, W Addition on Performance of Ni/Al_2O_3 Catalyst for Hydrodeoxygenation
     Mo、W对Ni/Al_2O_3催化剂加氢脱氧性能的影响
短句来源
     Effect of Preparation Conditions on Hydrofining Performance of MoP/γ-Al_2O_3 Catalysts
     制备条件对MoP/γ-Al_2O_3催化剂加氢性能的影响
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     Tetrahydrofurfuryl alcohol (THFA) was prepared from furfuryl alcohol with hydrogenation reduction by using the catalyst at 393-413 K,0 25-0 4 h -1 and 2 0-4 0 MPa.
     在 393~ 413K、0 .2 5~ 0 .4h-1、2 .0~ 4.0MPa条件下 ,用上述催化剂加氢还原糠醇制备四氢糠醇。
短句来源
     Modification effect of ceria to low-loaded Pd/Al_2O_3on gas phase hydrogenation of acrylonitrile
     铈对低负载Pd/Al_2O_3催化剂加氢丙烯腈的改性效应
短句来源
     7-Fluoro-2H-1,4-benzoxazin-3(4H)-one(2) was prepared through the reaction of hydrogenization catalyzed by Rany Nickel from methyl 2-(5-fluoro-2-nitrophenoxy) acetate(1).
     研究了雷尼镍为催化剂加氢还原2-(5-氟-2-硝基苯氧基)乙酸甲酯(1)合成7-氟-2H-[1,4]苯并噁嗪-3(4H)-酮(2)的方法,使还原、合环一次完成。
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  相似匹配句对
     New homogeneous catalytic hydrogenation research of styrene-butadiene triblock copolymers
     SBS新型加氢催化剂
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     PREPARATION OF HYDRAGENATION CATALYST FOR HNBR
     丁腈橡胶加氢催化剂的研制
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     The status of R & D on methanol synthesis catalyst was reviewed.
     ; 催化剂;
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  catalysts for hydrogenation
Preparation and catalytic performance of monolayer-dispersed Pd/Ni bimetallic catalysts for hydrogenation
      
The mechanism of the formation and the nature of microheterogeneous catalysts for hydrogenation are discussed using acetylacetonate complexes of palladium with phosphine ligands as an example.
      
The mechanism of formation and the nature of microheterogeneous catalysts for hydrogenation are considered using palladium acetylacetonate complexes with tertiary phosphines as an example.
      
Selectivity of heterogeneous catalysts for hydrogenation of linolenate over linoleate is increased by the presence of certain polar solvents.
      
Principles and catalysts for hydrogenation of fats and oils
      
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叙述了用浸渍法、共沉淀法和混合法制得的硅酸铝为载体的 MoS_2-SiO_2-Al_2O_3 催化剂的制备方法,并对这些催化剂的物理性质和催化性质进行了比较.各催化剂的加氢活性评价是用苯在实验室微型反应设备中进行的.评价活性的条件为:温度420°,压力200大气压,液体空速3小时~(-1),氢苯分子比为8:1.结果表明不同方法制备的硅铝载体对 MoS_2-SiO-Al_2O_3催化剂的加氢活性有很大的影响,这是由于载体表面上的 SiO_2/Al_2O_3比不同所致.可方法制备的硅铝载体在承载了硫化钼以后,它们的表面结构的变化也不相同.

The dependence of the surface characteristics of Mo/TiO2 (anatase) hydrogenation catalyst on its preparation procedure has been studied by laser Raman spectroscopy. It is found that the pH value of impregnating solution affects the chemical states of the molybdena on TiO2 (A). The amount of polymolybdate on catalyst surface increases with the increasing acidity of the impregnating solution, on the contrary, the amount of MoO3 decreases gradually. When impregnating TiO2(A) with 2%(wt) of molybdena, the predominant...

The dependence of the surface characteristics of Mo/TiO2 (anatase) hydrogenation catalyst on its preparation procedure has been studied by laser Raman spectroscopy. It is found that the pH value of impregnating solution affects the chemical states of the molybdena on TiO2 (A). The amount of polymolybdate on catalyst surface increases with the increasing acidity of the impregnating solution, on the contrary, the amount of MoO3 decreases gradually. When impregnating TiO2(A) with 2%(wt) of molybdena, the predominant species on the surface are octahedral polymolybdate and tetrahedral MoO42-. Increasing the wt% of molybdena to 10%, the free MoO3 begins to emerge, and becomes to be the main species at above 20%(wt) of molybdena. The chemical states of Mo supported on TiO2(A) are quite similar to that of Mo supported on r-A12O3,no new phase is observed. The wave number of the terminal M = O bonding vibrations of polymolybdate on TiO2(A) has shifted toward higher frequency. This indicates that the degree of polymerization of molybdate is increased. The polymolybdate, in general, . on the surface is considered as the active species in catalyst, so that the higher the polymerization degree of molybdate, the higher the hydrodenitrification (HDN) activity of the. catalyst. The MoO3 is considered as inactive species, its concentration in the catalyst increases rapidly with the increase of Mo loading, therefore, there is a limit to the contribution of Mo in Mo/TiO2(A) catalyst to HDN activity.Mo/TiO2(A) and Mo/r-Al2O3 are similar in their Raman spectro-scopies,but quite different in their catalytic properties. The advantages of Mo/TiO2(A) in HDN reaction is very impressive, and it can be developed as a promising catalyst for the HDN of petroleum.

应用激光喇曼光谱研究了Mo/TiO_2(Anatase)催化剂表面Mo的化学形态和制备条件的关系,并和Mo/γ-Al_2O_3进行了比较。钼在两种载体上的化学形态基本相似,没有发现新物相。在相同条件下,钼在TiO_2(A)上生成的聚钼酸的端基Mo=O的喇曼散射频率比在γ-Al_2O_3上向较高波数方向移动,这意味着钼酸的聚合度更高一些。一般认为催化剂表面上聚钼酸是催化活性相,钼酸聚合度越高,催化剂的加氢脱氮活性也高。聚集态的MoO_3则是非活性相,MoO_3浓度随钼浓度的增加而增加,所以TiO_2(A)上钼的担载量对催化剂活性的贡献是有一定限度的。

The hydrogenation of 1,4-butynediol solution over Raney nickel catalyst for butynediol synthesis has been investigated. The optimum operating conditions with proper catalyst concentrations, agitation intensities,hydrogen pressures and reaction temperature sequences have been verified under the guidance of the basic reaction engineering principles. It has been proved that the reaction rates and the selecctivties are greatly influcenced by the concentration of hydrogen on catalyst surface

本文对丁炔二醇水溶液用Raney镍型催化剂加氢生成丁二醇的反应过程进行了剖析。运用反应工程基本原理解释优惠的工艺操作条件,包括合适的催化剂浓度、搅拌强度,氢气压力和反应温度序列等因素。实验证明,影响这一催化加氢反应速率和选择性的根本因素是催化剂表面的氢浓度。

 
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