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[求助]
摘要翻譯 就幾句話 化工吸附劑類的文章
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Fixed-bed adsorption using different π-complexation adsorbents for desulfurization of liquid fuels was investigated. Cu(I)-Y (autoreduced Cu(II)-Y), Ag-Y, H-Y, and Na-Y zeolites were used to separate low-concentration thiophene from mixtures including benzene and/or n-octane, all at room temperature and atmospheric pressure. Sulfur-free (i.e., below the detection limit of 4 ppmw sulfur) fuels were obtained with Cu(I)-Y, Ag-Y, and H-Y but not Na-Y. Breakthrough and saturation adsorption capacities obtained for an influent concentration of 760 ppmw sulfur (or 2000 ppmw thiophene) in n-octane follow the order Cu(I)-Y > Ag-Y > H-Y > Na-Y and Cu(I)-Y > H-Y > Na-Y > Ag-Y, respectively. Cu(I)-Y zeolite adsorbed 5.50 and 7.54 wt % sulfur at breakthrough and saturation, respectively, for an influent concentration of 760 ppmw sulfur in n-octane. For the case of 190 ppmw sulfur in mixtures containing both benzene and n-octane, Cu(I)-Y adsorbed 0.70 and 1.40 wt % sulfur at breakthrough and saturation, respectively. Regeneration of the adsorbent was accomplished by using air at 350 °C, followed by reactivation in helium at 450 °C. The observed adsorption behavior, in general, agrees well with previous studies performed for pure-component vapor-phase adsorption of thiophene and benzene with the same adsorbents. |
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jiangguofeng
金蟲 (著名寫手)
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- 專業(yè): 合成藥物化學(xué)
【答案】應(yīng)助回帖
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小小起: 金幣+3, ★★★很有幫助 2015-05-03 10:56:50
小小起: 金幣+3, ★★★很有幫助 2015-05-03 10:56:50
| 對使用不同π-絡(luò)合吸附劑用于液體燃料脫硫的固定床吸附作用進(jìn)行了調(diào)查。Cu(I)-Y（自還原Cu(II)-Y), Ag-Y, H-Y, Na-Y型分子篩用于從包含苯及/或正辛烷的混合物中分離低濃度噻吩，全部都在室溫下和常壓下。由Cu (I)-Y、Ag-Y和H-Y而不是Na-Y得到不含硫的（即,低于4 ppmw硫的檢測極限）燃料。分別按照Cu(I)-Y > Ag-Y > H-Y > Na-Y和Cu(I)Y > H-Y > Na-Y > Ag-Y的順序，得到了于正辛烷中進(jìn)水760 ppmw硫(或2000 ppmw噻吩)濃度的穿透吸附容量和飽和吸附容量。 正辛烷中進(jìn)水硫濃度760ppmw，Cu(I)-Y型分子篩于穿透點和飽和點分別吸附5.50和7.54wt%硫。 在既含有苯又含有正辛烷的混合物中190 ppmw硫的情況下，Cu(I)-Y于穿透點和飽和點吸附的硫分別為0.70和1.40wt%。吸附劑的再生通過于350°C利用空氣，隨后于450°C于氦中進(jìn)行再活化而完成的。在一般情況下吸附行為的觀測結(jié)果與以前用同樣的吸附劑對于純組分汽相噻吩和苯的吸附進(jìn)行的研究結(jié)果相吻合。 |
2樓2015-04-24 13:07:51
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