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裂化活性
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  cracking activity
     The effects of n(SiO_2)/n(Al_2O_3) on acid type, acid amount of surface, cracking activity and selectivity of the kaolin catalyst were studied.
     对酸处理高岭土进行吡啶-TPD实验、BET测试及裂化活性测试,并在小型固定床上以酸处理高岭土为催化剂对大港轻柴油进行催化裂化反应,考察了n(SiO2)/n(Al2O3)对高岭土表面酸性、裂化活性和选择性的影响。
短句来源
     So the cracking activity of the MOR/ZSM-5 co-crystalline material is 18% higher than the physical mixture of ZSM-5 and mordenite.
     450℃下,老化了的丝光沸石/ZSM-5混晶材料较机械混合物对正十四烷的裂化活性提高18%。
短句来源
     Isomerization, ring-opening and cracking activity of cyclohexane on catalysts increased with increasing of catalyst acidity and reaction temperature.
     结果表明,反应温度和载体酸性是影响催化剂异构化活性、裂化活性的两个重要因素,增加反应温度或提高催化剂酸性都会导致催化剂的异构化活性降低、裂化活性增强.
短句来源
     It was shown that the cumene cracking activity on faujasites increased with increasing dealumination and reached a maximum at the Si/Al ratio 5. 38, then decreased with the Si/Al ratios increasing.
     样品裂化活性随骨架Si/Al比增加呈山峰形变化,Si/Al=5.38时最大;
短句来源
     Conforming to (he catalytic cracking activity of these catalysts, Bronsted acid site -was confirmed to be the active center responsible for cracking reaction. EPR results showed that Ni0 was also the active ccntei for cracking. Due to the interaction between Ni0 and the strong acidic support A1PO4 gel, the cracking activity of Ni/AlPO4 gel(R) was lower than that of Ni/AlPO4-5(R).
     由EPR测试结果又证实了Ni~0也是裂化反应的活性中心。 由于Ni~0与强酸性 载体AlPO_4胶体的相互作用,致使Ni/AlPO_4胶体(R)的裂化活性低于Ni/AlPO_4-5(R)。
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  “裂化活性”译为未确定词的双语例句
     The perfermance test on a commercial riser cracker shows that meta-Y-3A molecular sieve cracking catalyst is of high activity and improved gasoline selectivity.
     偏Y-3A分子筛裂化催化剂在提升管催化裂化工业装置上使用试验的结果表明,该催化剂的裂化活性较高,汽油选择性较好.
短句来源
     The acidity and crackability of equilibrium catalyst were considerably improved by mixing it with the feedstock directly and putting them into the riser.
     该酸性助剂与原料油直接混合进入提升管 ,与平衡剂接触明显改善了平衡剂的B酸酸性 ,提高了催化剂的裂化活性
短句来源
     The effects of vanadium trapping agent (VTA) La 2O 3 on the performance of the commercial FCC catalyst RHZ-300 with depositial vanadium were investigated in a catalytic micro reactor.
     考察了稀土钝钒剂(其活性组分为La2O3)对钒污染的RHZ-300裂化催化剂的裂化活性、生焦及再生性能的影响。
短句来源
     But after hydrothermaltreqting, the ability of ZRP to aromatize decreasedvery obviously.
     但在经水热老化处理后,改性ZRP芳构化能力和裂化活性显著下降。
短句来源
     When magnesium is added to 3% phosphorus modified HZSM-5 zeolites,the number of acid sites,the activity of n-hexane cracking and the conversionfrequency over each acid site increase with increasing magnesium content.
     在3%磷改性的 HZSM-5上加入镁时,沸石的酸中心数、裂化活性和单位酸中心上转化频率都随着镁含量增加而增加。
短句来源
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  相似匹配句对
     ACIDITY OF ZSM-5 CATALYST AND ITS CRACKING ACTIVITY
     ZSM-5分子筛的酸性和裂化活性
短句来源
     The Research of the Acid Activation of Bentonite
     膨润土酸活化的催化裂化活性
短句来源
     Active Packaging Materials
     活性包装材料
短句来源
     Activated Carbon Fibers
     活性碳纤维
短句来源
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  cracking activity
Gas chromatography and nuclear magnetic resonance analysis of the liquid products showed that RM had hydrogenation and cracking activity in hydrotreatment of WMO.
      
The Pd-Pt/Al2O3 catalyst possessed lower cracking activity with a parallel increase of the selectivity for benzene and iso-hexanes.
      
It has been established that thermosteam modification sharply decreases the cracking activity and increases the selectivity to aromatization reactions.
      
Introduction of hydrogen sulfide suppressed only the hydrogenation activity, but did not affect the cracking activity, indicating that hydrogen sulfide suppresses the metallic function without changing the acidic function.
      
The catalytic cracking activity of mesoporous materials for the production of biofuel from fatty acid mixture is reported.
      
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There exist a number of different theories as to the nature and the origin of the acidity of silica-alumina cracking catalysts.Even the proper method for its determination is subject to debate. The authors of this paper studied the acidity of co-precipitated silica-alumina catalysts prepared by the same procedure but containing different proportions of alumina and base-exchanged in different solutions.The acidity of each of these catalysts before and after calcination is determined respectively by several known...

There exist a number of different theories as to the nature and the origin of the acidity of silica-alumina cracking catalysts.Even the proper method for its determination is subject to debate. The authors of this paper studied the acidity of co-precipitated silica-alumina catalysts prepared by the same procedure but containing different proportions of alumina and base-exchanged in different solutions.The acidity of each of these catalysts before and after calcination is determined respectively by several known methods.In addition the authors devised a new method for the determination of acidity based on the adsorption isotherm in aqueous potassium hydroxide solutions.The data so obtained by these different methods are correlated with the cracking activity of the different catalysts. Based on the results obtained in this work,the mechanism by which acidic centers are formed in the course of catalyst preparation is discussed,and it is proposed that acidic centers of different nature and acid strength,including both Lewis and protonic acid centers,are present on the surface of co-precipitated silica-alumina catalysts.Acid centers of the protonic type made up of two aluminium atoms are believed to be mainly responsible for the cracking activity of such catalysts, although certain other acid centers may also possess catalytic activity to a greater or less extent.

关于硅铝裂化催化剂的酸性的性质和由来存在着一系列的不同理论.甚至测定硅铝催化剂酸性的适当方法也是争论的问题.本文作者用同样的步骤,但用不同氧化铝含量,并用不同的溶液进行离子交换,制备了不同的共胶硅铝催化剂,并研究了它们的酸性.每个催化剂在陪烧前后用几种已知的方法来测定酸性.此外作者还提出了一种新的,基于催化剂在氢氧化钾水溶液中的吸附等温线的酸性测定方法.用这些不同方法所得的数据和催化剂的裂化活性作了比较.根据本工作所得的结果,作者讨论了在催化剂制备过程中酸性中心形成的机理,并提出了下列看法:在共胶硅铝催化剂的表面上存在着不同性质和不同强度的酸性中心,包括路易(Lewis)酸中心和质子酸中心.作者认为这类催化剂的活性主要是由具有两个铝原子的质子酸中心所产生的,虽然某些其它类型的酸性中心也可能在不同程度上具有催化活性。

~~

研究了以硅酸铝为载体的 MoS_2催化剂的表面物化性质,以及载体中 SiO_2/Al_2O_3含量比不同时这些物化性质的变化.实验结果表明,组成不同的各硅铝载体载硫化钼后,其表面孔隙结构均有不同程度的变化。这种变化部分是由于承载过程的条件引起的,而主要是由于硫化钼和载体的组成分相互作用而引起.这种相互作用也使载体的表面酸度改变,但这种改变和其裂化活性的变化不是一致的.这种相互作用使载体生成新的粗孔,同时,改变了载体的相组成——形成类似α—SiO_2的新相.根据组成不同的各种硅铝载体在载 MoS_2后所发生的各种表面物化性质的变化,认为硫化钼和硅铝载体各组成分(氧化铝、氧化硅、活性硅铝络合物)形成了新的化合物.

The poisoning effects of 11 nitrogen compounds on 5 different kinds of oils (Yumen heavy diesel oil, Fushun acid Washed light shale oil, cetane, decalin, etc.) were investigated, the main purpose being to study the poisoning mechanism of different classes of nitrogen compoands on different cracking feed stocks. The results indicate that the poisoning effect of the pyridine and pyrrole classes of nitrogen compounds on the cracking activity and selectivity of the above mentioned oils is similar to that found in...

The poisoning effects of 11 nitrogen compounds on 5 different kinds of oils (Yumen heavy diesel oil, Fushun acid Washed light shale oil, cetane, decalin, etc.) were investigated, the main purpose being to study the poisoning mechanism of different classes of nitrogen compoands on different cracking feed stocks. The results indicate that the poisoning effect of the pyridine and pyrrole classes of nitrogen compounds on the cracking activity and selectivity of the above mentioned oils is similar to that found in our precious reports. However, there is no such independent and additive property between the poisoning effects of these two classes of nitrogen compounds as found before. The poisoning curves produced by these two classes are also different: the pyridine class causes exponential decrease in activitv while pyrrole causes linear decrease. Furthermore, the poisoning effect of the pyridine class on the cracking selectivity, as expressed by the carbon number distribution of cracked products, is different for shale oil and petroleum. On the basis of these results, a poisoning model involving two different kinds of active centers as well as two different kinds of poisoning mechanism is proposed. By means of this model, the main results found in this and previous reports can all he explained.

研究了十一种氮化合物对玉門脫腊重柴油、酸洗撫順頁岩輕油、十六烷及十氫萘等五种油料的中毒作用,主要目的在于考察不同系氮化合物对不同裂化进料油的中毒作用。 結果发現吡啶系与吡咯系氮化合物对于五种油料的裂化活性与选择性的影响与前两报結果相似,但与前不同的是两系氮化合物的毒性之間却不存在独立而可加的現象。此两系氮化合物的中毒曲綫也有所不同:吡啶系使裂化活性成指数关系下降,然而吡咯系却使其直綫下降,此外还发現吡啶系中毒对天然油与頁岩油的裂化选择性(裂化产品的碳数分布)的影响也不同。根据这些結果,提出了两种活性中心及两种中毒机理的模型。以此模型可以解释本报告及前数报中的所有主要結果。

 
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