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zr catalyst
相关语句
  zr催化剂
     Effect of CO on CO 2 Hydrogenation to Methanol over Cu Zn Zr Catalyst
     CO对Cu-Zn-Zr催化剂CO_2加氢合成甲醇的影响
短句来源
     ethyl acetate was synthesized in one step by dehydrogenation of methanol and ethanol over Cu/Zn/Al/Zr catalyst.
     在Cu/Zn/Al/Zr催化剂上由甲醇、乙醇脱氢一步合成乙酸甲酯。
短句来源
     The structure, reducibility and acid base properties of a Cu/Zn/Al/Zr catalyst have been studied by BET, XRD, TPD and FT IR techniques. The results show that the surface area of the catalyst is as high as 130 m 2/g and the components of the catalyst are fully dispersed. Only one hydrogen consumption peak is found by TPR.
     醇脱氢制酯Cu/Zn/Al/Zr催化剂的表征温涛潘伟雄孙旭辉(清华大学化学系C1国家重点实验室,北京100084)关键词Cu/Zn/Al/Zr催化剂,乙醇,乙酸乙酯,脱氢,表征分类号O643/TQ42自Eliott等[1]报道在Cu/Zn/Al催化.
短句来源
     Effects of CO on methanol synthesis from CO 2 hydrogenation over Cu Zn Zr catalyst have been studied. The results indicated that CO can suppress adsorption of CO 2 which is process the reverse water gas shift reaction on catalyst surface. Therefore it increased the methanol selectivity from CO 2 hydrogenation effectively.
     用四种CO含量不同的原料气对Cu-Zn-Zr催化剂进行CO2加氢合成甲醇的研究.结果表明CO能抑制催化剂表面产生逆水汽变换反应活性位的CO2吸附,从而有效地提高CO2加氢合成甲醇的选择性
短句来源
  “zr catalyst”译为未确定词的双语例句
     Isopentanoic isopentanoate was synthesized from isopentanol over Cu/Zn/Al/Zr catalyst.
     在Cu/Zn/Al/Zr体系催化剂上由异戊醇一步合成异戊酸异戊酯。
短句来源
     When rare earth Zr Catalyst is working at 290℃,fuel oils come to the highest 86.1%,RON. 92.15.
     稀土锆催化剂Ⅰ在290℃时,液体油品产率最高,为86.1%,汽油辛烷值为92.15。
短句来源
     Forthly, a new style transformation catalst - rare earth Zr catalyst was developed for practical production, the rare earth Zr catalyst whose carrier was powder A^Oa was gotten by co-precipitation.
     再次,结合实际生产的要求,研制了一种新型的改质催化剂—稀土锆催化剂。 以共沉淀法得到以氧化铝粉末为载体的稀土锆改质催化剂。
短句来源
     Butanediol and /or butyrolactone were directly prepared from maleic anhydridevapour-phase hydrogenation over Cu/Zn/Cr/Zr catalyst. The conversion was 100 mol %. The yields of target products can be varied by adjusting the reaction parameters according to the market demand.
     以Cu/Zn/Cr/Zr混合氧化物为催化剂,顺酐一步气相氢化制备1,4-丁二醇和/或γ-丁内酯,顺酐转化率100mol%,目的产品的产率可根据市场需求,通过调整反应参数的方法调节,最大量生产1,4-丁二醇时,其选择性≥70mol%,最大量生产γ-丁内酯时,其选择性≥90mol%。
短句来源
     Al(NO3)3 Zr(NO3)3 and(NH2)2CO being used as material in the article, rare earth Zr Catalyst whose carrier was powder Al2O3 was gotten by co-precipitation and was used in the stage of Catalytic transformation in waste plastics cracking.
     本文以硝酸铝、硝酸锆和尿素为原料,用共沉淀制取以超细氧化铝为载体的稀土锆催化剂,并将该催化剂应用于废塑料裂解的催化改质阶段。
短句来源
  相似匹配句对
     Zr.
     Zr.
短句来源
     The Zr content in the supported catalyst was determined by UV spectroscopy.
     通过紫外吸收法测定了负载催化剂的Zr含量。
短句来源
     Study on hydrogenation catalyst Cu-Zn-Zr of edible oils
     新型油脂加氢催化剂Cu-Zn-Zr的研究
短句来源
     The Catalyst for Hydrosilation
     硅氢加成反应催化剂
短句来源
     The catalyst was reusable.
     催化剂可重复使用。
短句来源
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  zr catalyst
Doping of Mn to Cu/Zn/Zr catalyst additionally increases the rate of methanol production.
      
Comparison of ethylene-propylene copolymers obtained with Ti, V and Zr catalyst systems
      
The Hf catalyst shows a smaller dependence of: (1) polymer MW on temperature and (2) polymerization activity on transition metal concentration than the Zr catalyst.
      
This difference may be attributed to the greater number of active centers present in the Zr catalyst.
      
compared to Cp2ZrCl2 case, the ethyl-bridged Zr catalyst performed better for polymerization of ethylene while the Si-bridged Zr catalyst showed better copolymerization ability.
      
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Esters were prepared by esterification of Carboxylic acid (or anhyd ride)with alcohols over organometallic compounds of Zr Catalysts. Thus,a mixture,of l mole carboxylic acid, 2.5mole alcohols, and 0.49 m mo le catalyst was heated 3 hours at reflux temperature to give a good yield of carboxylie acid esters.

在羧酸(或酸酐)与醇的酯化反应中以有机锆化合物为催化剂制各酯,羧酸与醇的摩尔比为1∶2.5,催化剂用量为0.49毫摩尔,在回流温度下,加热3小时,羧酸酯的产率较好。

Isopentanoic isopentanoate was synthesized from isopentanol over Cu/Zn/Al/Zr catalyst.The conversion is 58%and the selectivity to isopentanoic isopentanoate is 93%at 285℃,0.6MPa and WHSV=1.5, while the conversion is 54%and the selectivity is 98%at 255℃,0.4MPa,WHSV=0.5.The reaction mechanism is supposed to be consisted of three consecutivereaction steps:dehydrogenation, disproportionation and esterification.

在Cu/Zn/Al/Zr体系催化剂上由异戊醇一步合成异戊酸异戊酯。进料液空速为1.5h ̄(-1)、285℃、0.6MPa下转化率58%,酯选择性93%;液空速0.5h ̄(-1)、255℃、0.4MPa下转化率54%,酯选择性98%。反应机理为异戊醇经历脱氢、歧化和酯化三个连续反应进行。

A process for synthesis of benzaldehyde by direct hydrogenation of methyl benzoate wasstudied in a continuous flow fixed-bed system. The catalytic activity of ZrO_2 and modified ZrO_2 bydifferent metal elements was examined. The effects of preparation method and reaction conditionson the hydrogenation reaction were investigated.The main results indicate that:(1)the modifyingeffect of the metal elements decreases in the following order:Mn,Cr,In,Zn,Y. Cu,Co;(2)at reac-tion temperature 340℃,methyl benzoate LHSV...

A process for synthesis of benzaldehyde by direct hydrogenation of methyl benzoate wasstudied in a continuous flow fixed-bed system. The catalytic activity of ZrO_2 and modified ZrO_2 bydifferent metal elements was examined. The effects of preparation method and reaction conditionson the hydrogenation reaction were investigated.The main results indicate that:(1)the modifyingeffect of the metal elements decreases in the following order:Mn,Cr,In,Zn,Y. Cu,Co;(2)at reac-tion temperature 340℃,methyl benzoate LHSV 0. 1h ̄(-1),and H_2 GHSV 850─1050h ̄(-1) ,the conver-sion of methyl benzoate reached 66%,and the selectivity of benzaldehyde approximately 84%forMn-Zr catalyst(Mn/Zr=5/100 atomic ratio)prepared by impregnation and Mn-Zr catalyst(Mn/Zr=10/l00 atomic ratio)prepared by coprecipitation.

在常压固定床反应装置上研究了ZrO_2及不同金属改性的ZrO_2系催化剂对于苯甲酸甲酯加氢制苯甲醛的反应性能,考察了催化剂制备方法、金属改性及反应条件对催化剂反应性能的影响。结果表明,Mn改性作用最显著;其次为Cr、In;而Zn、Y、Cu、Co改性较差。在反应温度340℃、氢空速(GHSV)850─1050h ̄(-1)、苯甲酸甲酯液体空速(LHSV)为0.1h ̄(-1)时,浸渍法与共沉淀法制备的催化剂(Mn/Zr原子比相应为5/100与10/100),苯甲酸甲酯转化率>66%,苯甲醛选择性>84%。

 
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