β分子筛膜的制备及其水处理的应用

发布时间：2018-07-07 23:09

本文选题：β分子筛膜 + 模板剂脱除　；参考：《青岛科技大学》2015年硕士论文

【摘要】：水是人类赖以生存的宝贵资源,而水资源短缺一直是人类面临的重大问题。海水淡化是解决水资源问题的有效途径。因此,选择一种较为经济的海水淡化方式是十分有必要的。膜技术作为一门新兴的技术已经应用于海水淡化产业,且展现了良好的优势。以结构性能良好的无机膜代替传统的有机膜材料进行水处理可能会提高膜的使用寿命从而降低操作成本及复杂性。本文主要探究β分子筛膜的制备以及其在水处理方向的研究。主要研究了β分子筛膜的合成,以及影响水处理的因素。1、在不同的时间下制备出结构良好,大小均一的分子筛晶体,它可以作为晶种法合成β分子筛膜的晶种。研究发现413 K下晶化三天的晶体形貌最为均一。同时重点考察了以不同的脱模方法对β分子筛晶体形貌的影响及脱模效果。发现873 K下高温焙烧法脱除模板剂对β分子筛的结构产生一定影响,而催化加氢裂化法则是一种较为温和实用的脱模方法。前者导致了分子筛骨架结构的坍塌和表面酸性的消失。2、采用以上制备的β分子筛通过动态润湿法涂覆晶种层,引导制备β分子筛膜。通过XRD、SEM接触角等表征不同时间、不同晶化次数及两种晶化母液对β分子筛膜合成的影响。并通过催化加氢裂化法活化β分子筛膜,用单组份渗透实验进行渗透表征。3、在购买的α-Al_2O_3陶瓷管规格设计组装了减压过滤装置的前提下,考察了不同条件下自来水在空白陶瓷管上的渗透衰减,探究pH和错流流速对渗透速率的影响。
[Abstract]:Water is a valuable resource for human survival, and the shortage of water resources has always been a major problem for human beings. Desalination is an effective way to solve the problem of water resources. Therefore, it is necessary to choose a more economical method of desalination. In this paper, the preparation of the membrane and the direction of water treatment are studied. The synthesis of the beta molecular sieve membrane and its influence are mainly studied. The factor of water treatment.1, the molecular sieve crystal with good structure and uniform size is prepared at different time. It can be used as seed method to synthesize the crystal of beta molecular sieve. It is found that the crystal morphology is the most homogeneous at three days under 413 K, and the influence of different demoulding methods on the crystal morphology of the beta molecular sieve and the removal of the mold are also emphasized. It is found that the removal of templating agents by high temperature roasting at 873 K has a certain effect on the structure of the beta molecular sieve, and the catalytic hydrocracking rule is a more mild and practical stripping method. The former leads to the collapse of the molecular sieve framework structure and the disappearance of the surface acidity of the molecular sieve.2, and the above prepared beta molecular sieve is coated by the dynamic wetting method. The effect of different times, different crystallization times and two kinds of crystallized mother liquor on the synthesis of beta molecular sieve membrane was characterized by XRD, SEM contact angle, and.3 was permeated by a single component osmosis experiment by catalytic hydrocracking method, which was designed and assembled in the purchased alpha -Al_2O_3 ceramic tube specifications. Under the premise of the pressure reducing filter, the permeation attenuation of tap water on the blank ceramic tube under different conditions was investigated, and the effect of pH and cross flow velocity on the permeation rate was investigated.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.893;TQ085.4

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