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锌改性
相关语句
  zinc modification
     The reason of aromatics yield increasing after zinc modification has been discussed.
     锌改性后改变了沸石表面的酸量和酸分布。 同时对锌改性后提高芳烃产量的原因进行了讨论。
短句来源
     This fundamental study is in consideration of reducing the olefin content of FCC naphtha and producing high octane number blending component. The catalytic aromatization of 6-carbon aliphatic hydrocarbons over different Si/Al ratio ZRP zeolite catalysts was carried out in a pulse micro-reactor unit, and the effects of zinc modification of ZRP zeolite and the zinc dosage were investigated. The aromatization performances of 1-hexene and n-hexane as well as its different branched isomers were compared.
     为降低催化裂化汽油的烯烃含量,生产高辛烷值调合组分,在脉冲微反装置上考察了C6链烃在不同硅铝比ZRP沸石催化剂上的芳构化反应性能,研究了ZRP沸石金属锌改性及锌含量对芳构化反应的影响,并对烯烃和烷烃以及不同支链度的烷烃芳构化反应性能进行了比较。
短句来源
     the zinc modification and the zinc content could significantly affect the yield and distribution of aromatics products;
     ZRP沸石锌改性以及改性金属锌的含量对芳烃产率和芳烃分布有显著影响;
短句来源
  zn modified
     STUDY ON THE REACTIONS OF THIOPHENE OVER Zn MODIFIED Y ZEOLITES
     锌改性分子筛的噻吩硫转化功能研究
短句来源
     In an isothermal integral reactor aromatization of propane to produce light aromatics was studied over Zn modified HZSM-5 catalysts. The effects of catalyst deactivation due to coking in the reaction were experimentally determined.
     在等温积分反应器中实验研究了由丙烷制取轻质芳烃 BTX(苯、甲苯及二甲苯 )的芳构化过程中 ,锌改性的 HZSM- 5催化剂的积炭失活对反应过程的影响。
短句来源
     The reactions of thiophene contained in FCC naphtha over USY zeolite, rare earth metal exchanged Y zeolite and Zn modified Y zeolite were studied on the MAT and correlated with zeolite acidity.
     采用催化裂化微型反应评价装置,考察了不同稀土含量的Y型分子筛及其锌改性后对催化裂化汽油中噻吩硫转化能力的影响,并与分子筛酸性关联,提出噻吩反应的可能途径。
短句来源
     The results showed that the amount of Lewis acid on the Zn modified zeolite increased more than the parent zeolite;
     结果表明:锌改性使分子筛的L酸量明显增加。
短句来源
  “锌改性”译为未确定词的双语例句
     AROMATIZATION OF HYDROCARBONS OVER ZINCMODIFIED ZSM-5 ZEOLITE Ⅱ.STRENGTH DISTRIBUTION OF L_(1616)ACID SITES AND LOCATION OF THE ACTIVE SITES
     烃分子在锌改性的ZSM-5沸石上的芳构化 Ⅱ.L_(1616)酸的强度分布及活性中心的位置
短句来源
     Aromatization of Mixed C_4 Hydrocarbons on Modified Zn-ZSM-5 Zeolite Catalyst
     锌改性的ZSM-5分子筛催化C_4烃类芳构化
短句来源
     STUDY ON ZINC-MODIFIED ZSM-5 CATALYST FOR THE AROMATIZATION OF n-PENTANE
     正戊烷芳构化反应的ZSM-5催化剂的锌改性研究
短句来源
     The strength distribution of the L_(1616)acid sites over zinc-modified ZSM-5 zeolite was determined by IR spectra of pyridine adsorption.
     用吡啶吸附 IR 测定了锌改性的 ZSM-5沸石上的 L_(1616)酸的强度分布。
短句来源
     CONVERSION OF LIGHT HYDROCARBONS TO AROMATICS ON LANTHANUM AND ZINC MODIFIED HZSM-5 CATALYST
     油田轻烃在镧、锌改性的HZSM-5催化剂上转化为芳烃的研究
短句来源
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  modified zn
The third, C-terminal segment, showing the highest conservation, encompassed a modified Zn finger motif.
      
IMC tuning is employed if relevant, or modified ZN type lookup rules if only the ultimate gain and frequency is established.
      
  zn modified
A series of Sn-Zn modified-MCM41 has been synthesized by direct hydrothermal method and characterized using ICP, XRD, TG/DTA, FT-IR, HRTEM and N2-adsorption techniques.
      
Moreover, the materials containing Sn and Zn exhibited higher catalytic activity than monometallic Sn and Zn modified MCM41.
      


The strength distribution of the L_(1616)acid sites over zinc-modified ZSM-5 zeolite was determined by IR spectra of pyridine adsorption.The results indi- cated that the L_(1616) acid is very strong Lewis acid and the L_(1616)acidity with various strengths first increases and then decreases with increasing zinc content over ZnZSM-5 samples. The pulse poisoning curves of ZnZSM-5 samples prepared by various me- thods have been studied.Compounds used as poisons were pyridine,2,6-dime- thylpyridine and 2,4-dimethylquindine.The...

The strength distribution of the L_(1616)acid sites over zinc-modified ZSM-5 zeolite was determined by IR spectra of pyridine adsorption.The results indi- cated that the L_(1616) acid is very strong Lewis acid and the L_(1616)acidity with various strengths first increases and then decreases with increasing zinc content over ZnZSM-5 samples. The pulse poisoning curves of ZnZSM-5 samples prepared by various me- thods have been studied.Compounds used as poisons were pyridine,2,6-dime- thylpyridine and 2,4-dimethylquindine.The poisons were pulsed into the ca- talyst and the pulse activity of the poisoned catalyst for n-heptane aromati- zation were then measured.The results indicated that active sites of the ZnZSM-5 zeolite are mostly distributed in the channels of ZSM-5 zeolite and the number on the external surface of the zeolite depends on zinc-modification methods of ZSM-5 zeolite.The preparation methods also strongly affects the acidic sites distribution in zeolite channels. The location of the active sites in ZSM-5 channels and the effect of the preparation methods on the stability of activity for aromatization of hydrocar- bons over ZnZSM-5 were discussed.

用吡啶吸附 IR 测定了锌改性的 ZSM-5沸石上的 L_(1616)酸的强度分布。结果表明,L_(1616)酸是很强的 Lewis 酸,各种强度的 L_(1616)酸量随 ZnZSM-5上锌含量的增加而增加,经过一极值然后下降。采用吡啶、2,6-二甲基吡啶和2,4-二甲基喹啉脉冲中毒和脉冲微反活性测定相结合的方法,研究了三种不同方法制备的 ZnZSM-5的脉冲中毒曲线。结果表明,ZnZSM-5的活性中心主要分布在 ZSM-5沸石的通道内,在外表面分布的数量决定于锌改性的方法。制备方法也强烈影响ZnZSM-5沸石通道内的酸位分布。讨论了活性中心在 ZSM-5通道内的位置及制备方法对 ZnZSM-5芳构化稳定活性的可能影响.

The conversion of propane and the selectivity of aromatics in the transformation of propane over HZSM-5 and zinc-modified HZSM-5 zeolite was examined. It was found that Zn-ZSM-5 catalysts is far superior to HZSM-5 both in the conversion and in the selectivity of aromatics formation. The conversion of propane is 94.3% and the yield of aromatics is 50.4% at 520℃ and 0.74h~(-1) over Zn-ZSM-5. By using the methods of Temperature-Programmed-D(?)orption of ammonia, the solid acidic properties of Zn-ZSM-5 catalysts...

The conversion of propane and the selectivity of aromatics in the transformation of propane over HZSM-5 and zinc-modified HZSM-5 zeolite was examined. It was found that Zn-ZSM-5 catalysts is far superior to HZSM-5 both in the conversion and in the selectivity of aromatics formation. The conversion of propane is 94.3% and the yield of aromatics is 50.4% at 520℃ and 0.74h~(-1) over Zn-ZSM-5. By using the methods of Temperature-Programmed-D(?)orption of ammonia, the solid acidic properties of Zn-ZSM-5 catalysts were also studied.

研究了在HZSM-5及其Zn改性的催化剂上、在不同反应条件下、丙烷芳构化反应的活性和选择性。试验结果表明,锌改性后的Zn-ZSM-5催化剂与HZSM-5相比,在同样的反应条件下,可提高丙烷转化率与芳烃选择性。在520℃,丙烷重量空速为0.74h~(-1)条件下,在Zn-ZSM-5上丙烷转化率达94.3%,芳烃收率达50.4%。实验中还应用TPD技术以NH_3为吸附质研究了Zn-ZSM-5催化剂表面酸性的改变对其活性和选择性的影响。

The aromatization of cracking gasoline on HZSM-5 and metal (Zn) modified HZSM-5 zeolites was investigated by using a continuous flow-reaction apparatus. The yields of the aromatics in liquid products were enhanced. A effective process of aromatization was proposed to abate the effects of sulfur and coke impurities in cracking gasoline, such as: distillation(in order to wipeout coke); hydrogenation-desulfuration;aromatization in hydrogen atmosphere;condensation of the products in order to obtain aromatics.The...

The aromatization of cracking gasoline on HZSM-5 and metal (Zn) modified HZSM-5 zeolites was investigated by using a continuous flow-reaction apparatus. The yields of the aromatics in liquid products were enhanced. A effective process of aromatization was proposed to abate the effects of sulfur and coke impurities in cracking gasoline, such as: distillation(in order to wipeout coke); hydrogenation-desulfuration;aromatization in hydrogen atmosphere;condensation of the products in order to obtain aromatics.The relationship between the solid acidic properties of the catalysts and its aromatization reactivity was also studied by using the methods of Temperature-Programmed-Desorption of ammonia. It was found that the suitable strcnth distribution and amount of acid sites on Zn-ZSM-5 may be one of the reasons for the high aromatization activity and selectivity of this catalyst.

采用连续流动反应装置,考察了裂解汽油在HZSM-5与金属元素改性的HZSM-5上的芳构化反应,发现锌改性后提高了液体产物中芳烃的收率。为了克服裂解汽油中含硫含焦杂质的影响,提出了获取芳烃的有效工艺:蒸馏除焦-加氢预脱硫-氢气氛下芳构化反应-冷凝产物。用氨吸附的程序升温脱附法,将催化剂的酸性质与其催化芳构化作用进行关联,认为Zn改性后的HZSM-5催化剂具有较温和的酸中心,可能是其芳构化高活性与高选择性的原因。

 
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