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hellen7256

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[求助] 求助文獻(xiàn)翻譯，謝謝！英譯中。

Currently, the majority of commercial zeolite membranes are synthesized using a seeded growth method. Seeding on the tubular alumina or stainless steel supports has been recognized as a crucial processing factor for obtaining high-performance zeolite membranes [1-7, 10-13]. However, the seeding method is not ideal for synthesizing zeolite membranes with high separation performance primarily because of the difficulty in forming a uniform seed distribution on the surface of the supports. Because the thermal expansion coefficient of zeolite materials is different from those of the alumina and stainless steel supports materials, the roughness of the applied supports generally results in defects and a random orientation in the zeolite films. To decrease the defects and mismatched between the zeolite layer and the supported materials, a thick zeolite polycrystalline film (self-supported) would be a deliberate choice.
In the late 2000s, pervaporation (PV), which is a membrane separation process, has gained increasing interest in industrial applications [1-7, 10-13]. This process is an effective and energy-efficient technology for the performance of separations, particular separations that are difficult to achieve using conventional separation processes. NaA zeolite membranes possess uniform, molecule-sized pores (0.42 nm) that offer a unique type of pervaporation membrane for use in a number of separation processes. Dense zeolite NaA membranes are hydrophilic, exhibit high selectivity for the removal of water from solutions and are a promising candidate for alcohol dehydration processes and seawater desalination [14]. The desalination test with a NaA zeolite-supported membrane was exhibited a high salts rejection (more than 99.9%) for all of the ions in seawater, and the high water flux in the seawater (1.9 kg/m2h at 69ºC) was much higher than that in pure water at temperatures below 100ºC[1].

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1樓 2015-06-15 21:21:49

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jiangguofeng

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hellen7256: 金幣+30, 翻譯EPI+1, ★★★★★最佳答案, 謝謝 2015-06-16 22:06:01

目前，大多數(shù)市售分子篩膜板都是采用用籽晶生長的方法合成的。于管狀礬土或不銹鋼支架上進(jìn)行播種已被公認(rèn)為獲得高性能分子篩膜板的關(guān)鍵性的加工條件[1 - 7, 10 - 13]。然而,這種播種方法對于合成具有高分離性能分子篩膜板來說并不理想，主要是因為在這種支架的表面上形成一種均勻的種子分配比較困難。由于分子篩材料的熱膨脹系數(shù)有別于礬土和不銹鋼支架材料,所以所用的支架的粗糙度通常導(dǎo)致分子篩膜上存在瑕疵和無規(guī)則取向。為了減少分子篩層和支架材料之間的這些瑕疵和失調(diào),較厚的分子篩多晶薄膜（自支撐）可能是一種不錯的選擇。
在二十世紀(jì)后期,滲透蒸發(fā)(PV)，一種薄膜分離法，在工業(yè)應(yīng)用上已經(jīng)受到越來越多的關(guān)注[ 1 - 7, 10 - 13]。對于進(jìn)行分離，特別是采用常規(guī)分離方法難以完成的分離來說，這種方法能是一種有效的節(jié)能的技術(shù)，。NaA分子篩膜板具有均勻的分子大小的孔(0.42納米)，這提供了一種獨特的滲透蒸發(fā)膜板可用于多種分離方法。致密的分子篩NaA膜板是親水性的,對于除掉溶液中的水表現(xiàn)出高選擇性并且在酒精脫水和海水淡化方面具有良好應(yīng)用前景[14]。
用NaA分子篩支承膜進(jìn)行的脫鹽試驗對于海水中所有的離子表現(xiàn)出很高的鹽截留率（大于99.9%）,并且于海水中的高水通量（1.9公斤／m2h于69℃）遠(yuǎn)遠(yuǎn)高于100℃以下的純水中的水通量[1]。

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2樓2015-06-16 12:56:45

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