无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (6): 43-48.doi: 10.19964/j.issn.1006-4990.2024-0297

• 研究与开发 • 上一篇    下一篇

利用稻壳灰水热合成A型沸石的研究

程妍(), 于天胤, 张宏洋   

  1. 黑龙江科技大学,黑龙江 哈尔滨 150028
  • 收稿日期:2024-05-29 出版日期:2025-06-10 发布日期:2024-07-22
  • 作者简介:程妍(1987— ),女,博士,讲师,主要研究方向为资源综合利用与深加工;E-mail:chengyan19870601@163.com
  • 基金资助:
    黑龙江省省属高等学校基本科研业务费科研项目(2021-KYYWF-1462)

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

CHENG Yan(), YU Tianyin, ZHANG Hongyang   

  1. Heilongjiang University of Science and Technology,Harbin 150028,China
  • Received:2024-05-29 Published:2025-06-10 Online:2024-07-22

摘要:

稻壳灰是稻谷燃烧后产生的副产物,主要富含无定形二氧化硅,通过资源回收和再加工,不仅可以有效减轻其堆积带来的环境负担,还能获得具有高附加值的A型沸石。以稻壳灰为硅源,经过水热反应合成A型沸石,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM),系统研究了硅铝比[n(SiO2)/n(Al2O3)]、NaOH溶液浓度、反应温度、反应时间对所合成沸石样品的物相组成与微观形貌的影响。结果表明,在n(SiO2)/n(Al2O3)为1.4、NaOH溶液浓度为2.5 mol/L、反应温度为100 ℃、反应时间为6.0 h的条件下,能够合成出晶相单一、结晶度高,并且具有明显立方体形貌、轮廓清晰的A型沸石。利用红外光谱(FT-IR)、热重-差热分析(TG-DTA)、氮气吸附-脱附测试等手段对最佳水热条件下合成的A型沸石进行表征。结果表明,水热产物A型沸石显示出一定的热稳定性,并且孔径均一,比表面积为44.468 m2/g,使其在吸附、催化剂载体等领域具有潜在的应用价值。

关键词: 稻壳灰, 水热法, A型沸石, 热稳定性

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

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