利用稻壳灰水热合成A型沸石的研究

doi:10.19964/j.issn.1006-4990.2024-0297

Abstract

Abstract:

Rice husk ash，a by-product of rice after combustion，mainly contains amorphous silica.Resource recovery and reprocessing of rice husk ash can not only reduce the environmental burden caused by the accumulation，but also obtain the A-type zeolite with high value.Using rice husk ash as silica source，the A-type zeolite was synthesized through hydrothermal reaction.The effects of Si/Al ratio［n（SiO₂）/n（Al₂O₃）］，NaOH solution concentration，reaction temperature and reaction time on the phase composition and microscopic morphology of the synthesized zeolite samples were comprehensively investigated using X-ray diffraction（XRD） and scanning electron microscope（SEM）.The results indicated that the A-type zeolite with single crystal phase，high crystallinity and well-defined cubic morphology could be obtained under the conditions of n（SiO₂）/n（Al₂O₃） of 1.4，NaOH solution concentration of 2.5 mol/L，reaction temperature of 100 ℃ and reaction time of 6.0 h.The A-type zeolite synthesized under optimal hydrothermal conditions was characterized using fourier transform infrared spectrometer（FT-IR），thermogravimetric analysis（TG-DTA） and N₂ adsorption-desorption test.The results showed that the hydrothermal product A-type zeolite exhibited certain thermal stability，had uniform pore size and specific surface area of 44.468 m²/g，making it potentially useful in fields such as adsorption，catalyst carrier.

Key words: rice husk ash, hydrothermal method, A-type zeolite, thermal stability

CLC Number:

TQ127.2

CHENG Yan, YU Tianyin, ZHANG Hongyang. Study on hydrothermal synthesis of A-type zeolite from rice husk ash[J]. Inorganic Chemicals Industry, 2025, 57(6): 43-48.

Figures/Tables 13

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on hydrothermal synthesis of A-type zeolite from rice husk ash

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