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paul9979金蟲 (小有名氣)
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[求助]
麻煩英語高手幫忙翻譯下,謝謝!
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| The membranes have been used for alcohol/water pervaporation. The membranes are highly selective for water and show selectivities >3100 for water using(90/10) ethanol/water feed systems. In permeation measurements , these membranes show no selectivities other than Knudsen for permanent gases. Unlike Knudsen diffusion, these membranes show increasing permeation with increasing temperature. This indicates the probability of small defects in the films around 10 Å. The defects shown by the gas permeation measurements indicate that cracks have formed in the membranes, possibly upon drying. It is believed that these are caused by the contraction of the zeolite NaA structure upon removal of water, which gives a 0.16% contraction in the dimensions of the unit cell. |
木蟲 (正式寫手)
| 這些膜已被用于乙醇/水的滲透汽化。膜對水具有高度選擇性,當給水系統(tǒng)為乙醇/水比例(90/10) 時,膜對水的選擇性>3100 。在滲透量測量中,這些膜沒表現(xiàn)出選擇性,除 Knudsen對永久性氣體具有選擇性。與Knudsen擴散不同,隨溫度升高,膜的滲透量增加,這表明膜上可能存在10埃左右大小的破損。基于氣體滲透量測量所顯示的破損,表明膜上已經(jīng)形成裂痕,這可能是在烘干后形成的。這些被認為是在除去水分時NaA型沸石的結(jié)構(gòu)收縮造成的,其單位晶胞的尺寸收縮達0.16%。 |

金蟲 (初入文壇)
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