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ankang276

金虫 (正式写手)

[求助] 请翻译催化方面的一段话

There was also a reduction in coke formation and RO
selectivity, even though the acid strength of the Mg-doped Mo2C/HY
was the same as that of the Mo2C/HY catalyst (Table 1). The increased
hydrogenation of naphthalene and tetralin limited the formation of
coke precursors that may undergo bimolecular reactions on acid sites
that form coke. In the case of K addition to the Mo2C/HY that resulted
in reduced acidity, ring-opening selectivity was reduced compared to
the Mo2C/HY catalyst, even though the Mo2C dispersion also
increased relative to the un-doped catalyst.
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Carena

铁杆木虫 (知名作家)

【答案】应助回帖

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sltmac(金币+1): 辛苦 2011-08-13 12:09:58
即使掺镁的Mo2C/HY酸强度和Mo2C/HY催化剂的酸强度一样,焦炭形成和RO选择性方面也有所减少(见表1)。萘和四氢化葵的氢增加限制了可能在酸位上发生双分子反应而形成焦炭的积炭前体的形成。虽然在掺镁的催化剂中,Mo2C扩散也增加了,但与Mo2C/HY催化剂相比,在导致酸减少的Mo2C/HY中加入K,会减少开环选择性。
Impossible Is Nothing
2楼2011-08-13 11:36:20
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slz146

木虫 (正式写手)

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sltmac(金币+1): !!! 2011-08-13 12:10:04
ankang276(金币+30, 翻译EPI+1): 2011-08-14 09:27:53
即使掺镁的Mo2C/HY催化剂的酸强度和Mo2C/HY催化剂的酸强度一样,焦炭的形成和RO选择性还是有所减少。焦炭前躯体在酸性位点上会发生双分子反应形成焦炭,而萘和四氢化葵加氢能力的提高会减少该焦炭前躯体的形成。相对于Mo2C/HY催化剂而言,即使 Mo2C 的分散性比未掺杂的催化剂还要高,向Mo2C/HY中掺杂K仍然会导致酸度以及开环选择性的降低。
3楼2011-08-13 12:06:31
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