Substrate heating method for coating metal surfaces with high-silica zeolites: ZSM-5 coatings on stainless steel plates

Abstract

Syntheses of ZSM-5 coatings on stainless steel plates were carried out via the substrate heating method. The reaction mixture was kept at temperatures below 100°C, while the metal plates were heated to temperatures above 100°C. It was demonstrated that continuous ZSM-5 coatings of different textures with different crystal morphologies and void fractions could be formed. ZSM-5 coatings were characterized by X-ray diffraction and scanning electron microscopy. The thickness of the ZSM-5 coatings could be varied depending on the synthesis conditions. Besides providing the opportunity of manipulating coating properties, the method is also beneficial in respect to the synthesis duration as compared to the conventional procedures.

Kinetics of water adsorption in microporous aluminophosphate layers for regenerative heat exchangers

“…Two concepts used for the preparation of thick layers on metal supports are: (a) the metal support is directly immersed in a synthesis solution therefore leading to direct growth, [4][5][6][7] or (b) the material is synthesized in a separate step prior to coating. [8] In the latter case the use of additional compounds, e.g.…”

“…Most commonly molecular sieves, in particularly zeolites A (LTA), [4,6,7,9, 10] Y (FAU) [11] or ZSM-5 (MFI) [5] are employed. [27][28][29][30] and Mersmann [31,32] have simulated the effects of mass and heat resistances as well as non-isothermal adsorption processes.…”

Recent Developments in Coating Technologies for Adsorption Heat Pumps: A Review

“…The adsorbent coatings generated by in situ synthesis technology are essentially represented by crystalline adsorbents, such as zeolites, meso-porous aluminosilicate molecular sieves, and metalorganic frameworks (MOFs). The most used zeolites belong to the faujasite-type (FAU)-such as zeolites X and Y [49,50]-Chabazite (CHA) and Linde Type A (LTA) zeotypes-such as SAPO-34 [51,52] and 4A [53]-or MFI-type, such as ZSM-5 [54]. More recently some in situ crystallization of MOFs by thermal gradient synthesis has also been proposed [26,55].…”

Solar driven cooling systems: An updated review

“…In order to increase the heat transfer coefficient between the substrate and the adsorbent, one option is to glue the adsorbent onto the heat exchanger [137]. Moreover, numerous working groups study the opportunity to directly crystallize adsorbent onto the heat exchanger substrate [138,139].…”