Composites ZSM-5/KIT-6 Synthesized Via Assembly Modification Procedure and Mechanical Grinding Procedure, Respectively, and Their Application to CO.sub.2 Adsorption
The micro/mesoporous composite ZSM-5/KIT-6 was synthesized via the assembly procedure of preformed ZSM-5 seeds into mesostructured KIT-6, and mechanical mixtures with different contents of zeolite were prepared via a mechanical grinding procedure. These composites were used as adsorbents for the cap...
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Published in | Water, air, and soil pollution Vol. 228; no. 11 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Springer
15.10.2017
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Subjects | |
Online Access | Get full text |
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Summary: | The micro/mesoporous composite ZSM-5/KIT-6 was synthesized via the assembly procedure of preformed ZSM-5 seeds into mesostructured KIT-6, and mechanical mixtures with different contents of zeolite were prepared via a mechanical grinding procedure. These composites were used as adsorbents for the capture of CO.sub.2 in the simulated flue gas conditions of 60 °C and 15 vol% CO.sub.2 with a thermal gravimetric analyzer (TGA). The combination of dual-pore structures improved the adsorption performance. The composite synthesized via the assembly procedure exhibited superior adsorption capacity to the mechanical mixtures. The maximum adsorption capacity was 1.223 mmol/g. For mechanical mixtures, the adsorption capacity was dependent on the ZSM-5 content and increased with the increase of ZSM-5 content. The composite can be applied for CO.sub.2 adsorption at flue gas temperature and desorption at regeneration temperature of 110 °C. The adsorption capacity showed only 3% attrition during five consecutive cyclic adsorption/desorption tests. The composites displayed excellent CO.sub.2 adsorption/desorption performance. |
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ISSN: | 0049-6979 1573-2932 |
DOI: | 10.1007/s11270-017-3599-7 |