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Synthesis of colloidal chabazite
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A project, aiming to prepare a membrane able to separate hydrogen from carbon monoxide, has been initiated together with the Department of Chemical Reaction Engineering at Chalmers University of Tecnology. Model calculations has indicated that the zeolite chabazite could be suitable for this purpose. The membrane is to be prepared with a method named the seed film method. This method requires the use of colloidal zeolite that has to be provided in a stable colloidal suspension. Two synthesis approaches were outlined, one using zeolite Y as chemical source and one using only pure chemicals in order to obtain a more well- defined synthesis. The synthesis were carried out in oil bath (100 C) with reflux. Products were purified and evaluated with Dynamic Light Scattering (DLS), X-Ray Diffraction (XRD), Scanning electron Microscopy (SEM) and nitrogen adsorption. The use of zeolite Y as a source resulted in a crystalline material different from zeolite Y. SEM showed a formation of long and thin crystals with a length of 4 ¥ìm and a width of 500 nm. XRD results indicated that the sample could be a mixture of various aluminium/silica oxides. Surface area measurements indicated that the product was not zeolitic material. The use of pure chemicals resulted in amorphous materials.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Chemistry, zeolites, chabazite, synthesis
Keyword [sv]
URN: urn:nbn:se:ltu:diva-49941ISRN: LTU-EX--02/253--SELocal ID: 73edfac0-1160-4ad8-9583-1564c61ae135OAI: diva2:1023294
Subject / course
Student thesis, at least 30 credits
Educational program
Chemical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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