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guo7fly

银虫 (正式写手)

[交流] 帮忙给翻译一下

enhanced site和normal  site 分别什么意思??
例如enhanced catalytic sites are  less active than are normal catalytic sites in the steps of initial C-C bond formation from methanol and dimethylether .
请各位高手帮忙解释一下!!
还有lattice aluminum 是晶格铝的意思  那extralattice aluminum 是什么意思??
[search]enhanced    normal  site    lattice[/search]
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guo7fly

银虫 (正式写手)

其中文献中有这么几句:it has been shown recently  that aromatization activity of Z-34 zeolite (catalytic sites: bridging OH group only )increase in the initial period of catalyst  operation under the condition of methanol conversition to hydrocarbons .on the basis of the comparision of the prouduct selectivities ,observed over Z-34 zeolite after 55min of its operition ,and the initial product selectivities ,  observed over Z-34ST zeolite  (catalytic sites :bridging OH groups and  enhanced activity of Z-34 zeolite ), the increase of aromatization activity of  Z-34 zeolite was concluded to be due to the enhanced activity sites,which choud be created as a consequence  of the interaction of this zeolite with the reaction mixture (water vapor ) .
这几句话的意思是不是说 enhanced activity sites 与 bridging OH 这种活性中心是不一样的,enhanced activity sites 对芳香化有催化作用 ,他的产生是由于催化剂与水蒸汽做用的原因?


this fact further supports our previous results that hae shown that the new activity sites are less active in the steps of alkene formation from methanol and dimethylether than  are normal activity sites of HZSM-5----bridging OH groups.
从这几句话是不是可以推断出 the new activity sites  就是enhanced activity sites ,而normal activity sites  就是bridging OH groups  ,前者对芳香化是有活性的,而后者对烯烃的生成是有活性的??

我知道单独这么看是很难 明白其中的意思!!各位高手还是花店时间吧!!谢谢!!
6楼2008-02-23 18:51:37
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guo7fly

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   大家帮忙忙啊
2楼2008-02-23 17:03:22
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pcchemist

金虫 (正式写手)


buffaloli(金币+1,VIP+0):多谢!
建议:具体描述一下催化反应体系,及有关的催化剂。如果能附上有关的参考文献可能会更好!

extralattice aluminum 我个人觉得是不是骨架中的铝脱掉以后,进入了孔道中,也形成了活性位!正如分子筛的脱铝。
3楼2008-02-23 17:37:07
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guo7fly

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   大家帮忙忙啊
4楼2008-02-23 18:06:06
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