本文選題：MFI型分子篩膜　切入點：原位水熱法　出處：《青島科技大學》2015年碩士論文

【摘要】：ZSM-5分子篩是MF1分子篩的一種,為摻雜A1等雜原子的形態(tài),硅鋁比可控,具有親水憎有機物的特性。其三維孔道結構獨特,有效孔徑約為0.55 nm,具有良好的熱穩(wěn)定性、耐酸性以及催化性能。近年來ZSM-5分子篩膜在物質分離、催化、膜反應等諸多領域有著廣泛的應用。膜技術分離與傳統(tǒng)的分離方法相比,可以實現(xiàn)節(jié)能、零污染。分子篩膜的制備過程涉及到載體材料、合成液的成分、水熱合成條件等,每一步對其合成膜的性能有較大的影響。本論文從載體材料表面改性、合成液成分調節(jié)、晶種層的制備等方面進行研究,做出以下工作：(1)采用化學鍍的方法對載體表面進行修飾,通過控制化學鍍液的成分、化學鍍時間,使得在載體表面得到均勻地化學鍍層�？疾椴煌瘜W鍍時間對載體表面形貌、化學鍍層形貌的影響,并使用單組分氣體進行滲透測試。(2)在經(jīng)過化學鍍的載體表面原位生長分子篩膜,考查不同的化學鍍層對分子篩膜生長的影響,分析金屬元素對分子篩膜生長促進機理,發(fā)現(xiàn)鎳磷鍍層改性的支撐體有利于分子篩膜生長.(3)用原位水熱法合成了納米晶種,考察了合成液中水含量、晶化時間對晶種合成的影響。重點考察不同脫模板劑的方法,催化加氫法能夠獲得比表面積大、孔道均一的分子篩孔道結構,為以后分子篩膜模板劑的脫除提供參考。(4)采用晶種法制備了分子篩膜,并系統(tǒng)地研究了晶種、晶種層的制備方法及晶化條件等對制備分子篩膜的影響。通過三次生長法制備出完備的分子篩膜,并通過催化加氫裂化法進行模板劑的脫除,用單組份滲透實驗進行滲透表征。
[Abstract]:ZSM-5 molecular sieve is a kind of MF1 molecular sieve, which is doped with Al and other heteratomic atoms. The Si-Al ratio is controllable and has hydrophobic organic properties. Its three-dimensional pore structure is unique, its effective pore size is about 0.55 nm, and it has good thermal stability. In recent years, ZSM-5 molecular sieve membranes have been widely used in many fields, such as material separation, catalysis, membrane reaction, etc. Compared with traditional separation methods, membrane separation can achieve energy saving. Zero fouling. The preparation process of molecular sieve membrane involves carrier material, composition of synthetic liquid, hydrothermal synthesis conditions, etc., each step has great influence on the performance of synthetic membrane. The preparation of the seed layer was studied, and the following work was done: 1) the surface of the carrier was modified by electroless plating. By controlling the composition of the electroless plating solution, the electroless plating time, The effect of different electroless plating time on the surface morphology of the carrier and the morphology of the electroless coating was investigated. The effect of different electroless coatings on the growth of molecular sieve membrane was investigated, and the mechanism of metal elements promoting the growth of molecular sieve membrane was analyzed. It was found that the support modified by Ni-P coating was beneficial to the growth of molecular sieve membrane. The nanocrystalline seeds were synthesized by in situ hydrothermal method. The effects of water content and crystallization time on the seed synthesis were investigated. The molecular sieve membrane with large specific surface area and homogeneous pore channel can be obtained by catalytic hydrogenation, which can provide a reference for the later removal of molecular sieve membrane template. The molecular sieve membrane was prepared by crystal seed method, and the crystal seeds were systematically studied. The effect of preparation method and crystallization conditions of seed layer on the preparation of molecular sieve membrane was studied. The complete molecular sieve membrane was prepared by three times growth method, and the template was removed by catalytic hydrocracking method, and the permeation was characterized by single component permeation experiment.
【學位授予單位】：青島科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ051.893

【參考文獻】

相關期刊論文 前1條

1 蔣海洋,張寶泉,林躍生,李永丹;無模板劑二次生長法合成MFI分子篩膜的生長機理[J];化工學報;2005年06期

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本文編號：1685904