火鳥 asked in 教育與參考考試 · 9 years ago

某日老師突然給了一篇英文的段落要我翻譯!! 重點來了!!

各位大大您好:

小弟遇到一個很深的問題! 某日老師突然給了一篇英文的段落要我翻譯!!

重點來了!! 翻譯機 真的很難用 ! 完全翻譯不清楚 ! 稿的我無法好好的翻譯那個段落 !! 請救救我 ~

Under supercritical conditions, however,the mixture becomes a single homogenousphase,which will accelerate the reaction because there is nointerphase mass transfer to limit the reaction rate. Another positive effect of using supercritical conditions is that the alcoholis not only a reactant but also an acid catalyst [72,73].A reaction mechanism ofvegetable oil in supercritical methanol is presented by Kusdian and Saka [73]. It is assumed that an alcohol moleculedirectly attacks the carbonyl atom of the triglyceride because of thehigh pressure. In the supercritical state, depending on pressure and temperature, hydrogen bonding would be significantly decreased, whichwould allow methanol to bea free monomer.The transesterification is completed via a methoxidetransfer, whereby the fatty acid methyl ester and diglycerides are formed. In a similar way, diglyceride is transesterified to form methyl ester and monoglycerides which is converted further to methyl ester and glycerol in the last step. The presence of water in the reaction system does not affect the yield of methyl esters under supercritical alcohol transesterification [73].

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    然而,在超臨界條件下,混合成為一個單一的均相 ,這將加速反應,因為有相間 傳質限制反應速率。使用超臨界條件下的另一個積極的作用。酒精 不僅反應物,但也酸催化劑[72,73] 。

    反應機制,在超臨界甲醇蔬菜 石油日報和薩卡[73]。據推測,酒精分子直接 攻擊甘油三酯,因為 高 壓力的羰基原子。在超臨界狀態,取決於壓力和溫度,氫鍵將顯著下降,這將 允許甲醇BEA游離單體。

    通過 甲醇轉移 ,其中的脂肪酸甲酯和甘油形成的酯交換完成。以類似的方式,甘油二酯是transesterified 形成​​甲基酯和單甘酯在最後一步,進一步轉換酸甲酯和甘油。水反應體系中的存在並不影響超臨界醇酯交換反應[73]甲基酯的產量。

    我不太確定這樣對不對 不過 我還是希望您能選我為最佳解答~

    Source(s): google翻譯
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