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菜鳥一號木蟲 (小有名氣)
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[求助]
[b]求中文摘要翻譯成英文[/b]
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| 以擬薄水鋁石高溫焙燒制取的γ-Al2O3為載體，利用Ce(SO4)2-H2SO4 溶液浸漬法用對γ-Al2O3改性，制備Ce-SO42-/ Al2O3固體催化劑。通過X射線衍射（XRD）、紅外光譜(IR)、掃描電鏡(SEM)、N2吸附-脫附等分析方法對催化劑進行了表征。結(jié)果表明活性組分的負(fù)載對載體Al2O3的結(jié)構(gòu)產(chǎn)生了較大的影響，由原來的片狀結(jié)構(gòu)變?yōu)榱罱Y(jié)構(gòu)，比表面積增大，BET測定的比表面積為346.3m2 /g。顆粒堆積后產(chǎn)生介孔范圍的孔道，平均孔徑約為5.29nm。將Ce-SO42-/ Al2O3催化劑應(yīng)用于催化合成乙酸正丁酯具有良好的催化活性，當(dāng)冰乙酸與正丁醇的物質(zhì)量比為1:1.0，催化劑用量為0.375g（相當(dāng)于冰乙酸的質(zhì)量的5％）反應(yīng)3h，酯化率可以達(dá)到93.42％。 |
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菜鳥一號: 金幣+150, 翻譯EPI+1, ★★★★★最佳答案 2015-06-09 13:35:47
菜鳥一號: 金幣+150, 翻譯EPI+1, ★★★★★最佳答案 2015-06-09 13:35:47
| In this research, the boehmite was treated by high-temperature roasting, producing the γ-Al2O3, which was then modified by Ce(SO4)2-H2SO4 solution impregnation method into the Ce-SO42-/ Al2O3 solid catalyst. And the soild catalyst was characterized by analysis methods such as x-ray diffraction（XRD）,infrared spectroscopy(IR), scanning electron microscope(SEM) and N2/adsorption-desorption. The results show that the active component load exert a great influence on the structure of Al2O3 substrate,such as structure changing from laminated structure to granular structure, and increased specific surface area that was measured as 346.3m2 /g by BET. After particle accumulation, channels were produced within the mesoporous range with average aperture of approximately 5.29nm. The Ce-SO42-/ Al2O3 catalyst can play a good effect in the synthesis of acetic acid n-butyl ester, in particular, when the substance ratio of glacial acetic acid and n-butyl alcohol is 1:1.0, with the addtition of 0.375g catalyst (equals the 5% of glacial acetic acid mass) , after reaction for 3h,the esterification rate can reach 93.42％. |
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