沸石
微型多孔材料
吸附
热液循环
化学工程
二氧化碳
解吸
材料科学
碳纤维
水热合成
傅里叶变换红外光谱
吸收(声学)
偏高岭土
矿物学
化学
催化作用
粉煤灰
有机化学
复合材料
工程类
复合数
作者
Sudipta Dasgupta,Marcos Antônio Klunk,Mohuli Das,Soyane Juceli Siqueira Xavier,Farid Chemale,Paulo Roberto Wander,Carlos Alberto Mendes Moraes
摘要
Abstract Several probes have been conducted by the scientific community to reduce emissions of greenhouse gases such as carbon dioxide (CO 2 ). A zeolitic material is capable of CO 2 adsorption with the aid of such technologies. Our present work is to efficiently synthesize zeolite Y with four Si/Al ratios (2.0, 2.5, 3.0, and 3.5) from green materials such as rice husk ash (source of Si) and metakaolin (source of Al). The method for preparing zeolite Y involves hydrothermal synthesis in a hydrodynamic reactor at 120°C temperature, for a reaction time of 24 hours. These synthetic zeolites represent high values for surface area as well as pore volume in micropore range and are compatible with the size of CO 2 molecules. The zeolite Y (with Si/Al ratio 3.5) has an absorption capacity of 3.35 mmol CO 2 /g at (900 kPa) pressure, thereby demonstrating high efficiency for CO 2 adsorption. The spectra of FTIR indicate Si‐OH‐Al groups, while the vibrations corresponding to Si‐O‐Si or Si‐O‐Al compounds display the characteristic structure of zeolite Y. Several tests have been conducted with the synthesized zeolites Y, which portrayed strong evidence of CO 2 absorption abilities. Henceforth, it can be concluded that zeolites Y have significant potential for application in adsorption/desorption cycles of carbon dioxide.
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