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研究从钢包炉渣和粉煤灰中合成方钠石、硅钙石和 P1 沸石材料的合成机制。

Study on the synthesis mechanism of sodalite, gismondine, and zeolite-P1 zeolite materials from ladle furnace slag and fly ash.

机构信息

College of Ecology and Environment, Xinjiang University, Urumqi, 830046, People's Republic of China.

Key Laboratory of Oasis Ministry of Education, Xinjiang University, Urumqi, 830046, People's Republic of China.

出版信息

Sci Rep. 2023 Feb 24;13(1):3232. doi: 10.1038/s41598-023-30282-y.

DOI:10.1038/s41598-023-30282-y
PMID:36828889
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9958088/
Abstract

In this study, geopolymers were prepared using ladle furnace slag (LFS) and fly ash (FA), and hydrothermal treatment was then used to synthesize bulk zeolite molecular sieves with gismondine, zeolite-P1, and sodalite phases. The effect of the synthesis conditions on the crystalline phases of the zeolite molecular sieves was investigated by XRD. The results showed that the best zeolite molecular sieves were prepared with an LFS: FA ratio of 4: 6, a curing temperature of 40 °C, a curing time of 12 h, a sodium silicate modulus (Ms) of 1.4, a NaOH concentration of 4 mol/L, a hydrothermal temperature of 120 °C, and a hydrothermal time of 12 h. On this basis, the products were analyzed by SEM, N adsorption, and FT-IR. The results showed that the synthesized zeolite molecular sieves had mesoporous properties, and the degree of polymerization and cross-linking of the silica-aluminate gel were enhanced after hydrothermal treatment. In addition, the formation mechanism of the zeolite molecular sieves was explored through the changes of the silica-alumina during zeolite formation. This paper is the first to use the hydrothermal conversion of zeolite molecular sieves from LFS-FA based polymers to provide some guidance for the resource utilization of LFS and FA.

摘要

在这项研究中，使用钢包炉渣（LFS）和粉煤灰（FA）制备了地质聚合物，并通过水热合成法合成了具有绿纤石、P1 沸石和方钠石相的块状沸石分子筛。通过 XRD 研究了合成条件对沸石分子筛结晶相的影响。结果表明，LFS:FA 比为 4:6、养护温度为 40°C、养护时间为 12 h、硅酸钠模数（Ms）为 1.4、NaOH 浓度为 4 mol/L、水热温度为 120°C、水热时间为 12 h 时，可以制备出最佳的沸石分子筛。在此基础上，通过 SEM、N 吸附和 FT-IR 对产物进行了分析。结果表明，合成的沸石分子筛具有介孔性质，水热处理后硅铝酸盐凝胶的聚合度和交联度增强。此外，通过沸石形成过程中硅铝酸盐的变化，探讨了沸石分子筛的形成机制。本文首次利用 LFS-FA 基聚合物中沸石分子筛的水热转化，为 LFS 和 FA 的资源化利用提供了一定的指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/3c49057a8f4e/41598_2023_30282_Fig12_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/3c49057a8f4e/41598_2023_30282_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/df1a28385000/41598_2023_30282_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/307949a8f061/41598_2023_30282_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/87af01067b0e/41598_2023_30282_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/9cf38df17645/41598_2023_30282_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/c5c68c052994/41598_2023_30282_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/f3901d65d800/41598_2023_30282_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/1f7f013d4b2e/41598_2023_30282_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/e791b931711a/41598_2023_30282_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/9dcc21b2a26f/41598_2023_30282_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/7818a3c980a9/41598_2023_30282_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/0e8e984b83c7/41598_2023_30282_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5002/9958088/3c49057a8f4e/41598_2023_30282_Fig12_HTML.jpg

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