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hellen7256木虫 (小有名气)
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[求助]
求助文献翻译，谢谢！英译中。
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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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jiangguofeng
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hellen7256: 金币+30, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2015-06-16 22:06:01
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目前，大多数市售分子筛膜板都是采用用籽晶生长的方法合成的。于管状矾土或不锈钢支架上进行播种已被公认为获得高性能分子筛膜板的关键性的加工条件[1 - 7, 10 - 13]。然而,这种播种方法对于合成具有高分离性能分子筛膜板来说并不理想，主要是因为在这种支架的表面上形成一种均匀的种子分配比较困难。由于分子筛材料的热膨胀系数有别于矾土和不锈钢支架材料,所以所用的支架的粗糙度通常导致分子筛膜上存在瑕疵和无规则取向。为了减少分子筛层和支架材料之间的这些瑕疵和失调,较厚的分子筛多晶薄膜（自支撑）可能是一种不错的选择。 在二十世纪后期,渗透蒸发(PV)，一种薄膜分离法，在工业应用上已经受到越来越多的关注[ 1 - 7, 10 - 13]。对于进行分离，特别是采用常规分离方法难以完成的分离来说，这种方法能是一种有效的节能的技术，。NaA分子筛膜板具有均匀的分子大小的孔(0.42纳米)，这提供了一种独特的渗透蒸发膜板可用于多种分离方法。致密的分子筛NaA膜板是亲水性的,对于除掉溶液中的水表现出高选择性并且在酒精脱水和海水淡化方面具有良好应用前景[14]。 用NaA分子筛支承膜进行的脱盐试验对于海水中所有的离子表现出很高的盐截留率（大于99.9%）,并且于海水中的高水通量（1.9公斤／m2h于69℃）远远高于100℃以下的纯水中的水通量[1]。 |
2楼2015-06-16 12:56:45
