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加氢处理
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  hydrotreating
It is a promising support for cracking and hydrotreating catalysts.
      
The mechanism of thiophene hydrodesulfurization over sulfide catalysts for hydrotreating and the effect of the catalyst composition and feed on the number, distribution, and performance of active sites were studied using 35S and 3H isotopes.
      
Based on the results of radioisotopic study, a method for systematic testing-monitoring of sulfide Co(Ni)Mo catalysts for hydrotreating is developed.
      
The hydrotreating activity of the catalysts was proportional to the amount of hydrogen consumed in the range 20-500°C during TPR.
      
Hydrotreating Ni heteropolytungstate catalysts have been prepared by impregnation of γ-Al2O3-alumina with solutions of H3PW12O40 acid and its Ni salt.
      
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Using pure benzene as raw material for the evaluation of catalytic activity of MoS_2, the study of the poisoning effect of pyridine and the "nitrogen compounds" separated from diesel fraction of Shale oil on MoS_2 catalyst was carried out. The experiments show that when the MoS_2 catalyst is previously treated by pyridine or "nitrogen compounds" under high pressure at lower temperature(300℃), it loses its activity for the hydrogenation of benzene ring; while at higher temperature (420℃), in such case that the...

Using pure benzene as raw material for the evaluation of catalytic activity of MoS_2, the study of the poisoning effect of pyridine and the "nitrogen compounds" separated from diesel fraction of Shale oil on MoS_2 catalyst was carried out. The experiments show that when the MoS_2 catalyst is previously treated by pyridine or "nitrogen compounds" under high pressure at lower temperature(300℃), it loses its activity for the hydrogenation of benzene ring; while at higher temperature (420℃), in such case that the nitrogen compounds can be completely hydrogenalyzed, therefore, the hydrogenating activity of MoS_2 catalyst remains unchanged after nitrogen compounds treatment, however, its isomerization and cracking activities are somewhat poisoned. Among these the isomerization activity is more sensitive towards: nitrogen compounds. The results also show that the pgisoning effect of pyridine is analogohs to that of the "nitrogen compounds" of diesel fraction of shale oil.

以苯作为評价MoS_2催化剂活性的原料,試驗了吡啶及頁岩油輕油“含氮化合物”对催化剂活性的影响。試驗証明在較低的溫度下(300°)經吡啶或“含氮化合物”的加氫处理后,催化剂完全失去了对苯加氫的活性;但在較高溫度下(420°以上),由于保証了含氮化合物的加氫裂解,催化剂仍保有相当的活性,其中除氫化性能几乎不受影响以外,影响最大的为异构性能,次之才为环烷的裂化性能。吡啶与含氮化合物的“毒性”,在性能上極其相近。

The solvent method is used to determine the surface acidity and acid strength distribution on the surface of hydrocracking and hydrotrea ting catalysts with black color. A comparison between the results obtained from this method and those from DTA-Ammeonia adsorption method is made. It is found that acid strength distribution curves are similar. The influence of the active metal oxides on the acidic properties of catalysts has heen studied.The results show that some active metal oxides, such as NiO and WO3 havn't...

The solvent method is used to determine the surface acidity and acid strength distribution on the surface of hydrocracking and hydrotrea ting catalysts with black color. A comparison between the results obtained from this method and those from DTA-Ammeonia adsorption method is made. It is found that acid strength distribution curves are similar. The influence of the active metal oxides on the acidic properties of catalysts has heen studied.The results show that some active metal oxides, such as NiO and WO3 havn't strong acid sites on their surf aces. Instead they can be able to increase the amount of strong acid of amorphous alumosilicates and the zeolite contain-ning acidic support s .Results obtained from pvridine-absorption--IR techniquetest show that the changes of Bronsted acid amount resulted by the active metal oxides on catalyst surface are correlated with the amount of strong acid determined by solvent method.By means of measuring the supports with different amounts of acidic component (UY zeolite)and strong acidity of Ni-W catalyst prepared with these supports, it is found that the solvent method is sensitively used to measure the changes in acidity of tested samples.

将溶剂法用于测定深色的加氢裂化和加氢处理催化剂的表面酸量及酸强度分布,并且用氨吸附-差热分析法进行了对照实验,发现两者有类似的酸强度分布曲线。用溶剂法考察了活性金属氧化物对催化剂酸性的影响,发现某些活性金属氧化物如NiO和WO_3自身没有强酸部位,却具有使无定形硅铝或含分子筛的酸性载体强酸量增加的能力。对照进行的吡啶吸附-红外光谱实验结果表明,活性金属氧化物使催化剂表面的Brosted酸量发生了与溶剂法所测得的强酸量有一定的相关关系的变化;用溶剂法测定了酸性组份(超稳Y型分子筛)含量不同的载体以及用这些载体制成的Ni-W催化剂的强酸量,发现溶剂法对试样酸性的变化反应灵敏。当载体含有45%(质量)超稳Y型分子筛时,加入Ni-W活性组份能使其强酸部位的增量达到最大。

he reduction and acidity properties of nickel-molybdenum hydrotreating catalysts have been studied by TPR and in situ FTIR. The hydrodesulfurization activity has been studied by pulse micro-reaction method using thiophene as probing molecule.The results show that the addition of third component (like TiO2,P2O5) will change the surface acidity and the activity of hydrodesulfurization of these catalysts.

通过程序升温还原法和原位傅里叶红外光谱方法,研究了钼镍系列加氢处理催化剂的还原性质和酸性质.以噻吩为探针分子,用脉冲微反方法研究了该催化剂的加氢脱硫性能.研究表明,第三组分(如TiO2、P2O5)的加入,引起了该催化剂的表面酸性质和加氢脱硫性能的变化.

 
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