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gter_wang

木虫之王 (文学泰斗)

小木虫优秀会员

[求助] 求一段英译汉

The addition of Mg to Mo2C/HY catalysts resulted in improved
dispersion of the Mo2C and no significant change in total catalyst
acidity. Addition of K also improved Mo2C dispersion but decreased
the total acidity by 30%. Increasing the dispersion of the Mo2C
improved the hydrogenation of napthalene and reduced coke
deposition on the catalyst by limiting the formation of coke precursors
that undergo bimolecular coke-formation reactions on acid sites.

[ Last edited by gter_wang on 2011-8-14 at 08:33 ]
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liubencai

木虫之王 (文坛精英)

【答案】应助回帖

gter_wang(金币+28, 翻译EPI+1): 2011-08-14 09:05:23
镁的加入Mo2C/HY催化剂改善了Mo2C分散性, 但是催化剂的总酸度没有显着的变化。K的加入也改善了Mo2C分散度,但总酸度下降了30%。增加Mo2C分散度改善了萘的氢化作用, 但却减少了催化剂上的积炭, 这是通过在酸性点上经历双分子焦炭形成的反应限制了焦炭前驱体的形成。
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3楼2011-08-14 08:49:17
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Carena

铁杆木虫 (知名作家)

【答案】应助回帖

在Mo2C/HY催化剂中添加镁元素会使Mo2C的扩散性提高,而对整个催化剂的酸度并无重大影响。添加钾元素也会提高Mo2C的扩散性,但是却将整个催化剂的酸度降低了30%。Mo2C扩散性的增加提高萘氢化的过程,减少了催化剂中的积炭,限制了在酸位上发生双分子焦炭形成反应的积炭前体的形成。
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2楼2011-08-14 08:42:18
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