Abstract
The utilization of coal gasification slag as a resource is a crucial aspect of the sustainable development of the chemical industry. Coal gasification fine slag (CGFS) contains abundant sources of silicon and aluminum, making it suitable for the preparation of high-value zeolite materials. In this study, coal gasification fine slag was utilized as a raw material, and different Si/Al ratios of zeolite were obtained through a graded preparation method using mother liquor cycle technology. Initially, P-type zeolite/carbon composites (P/C composites) with a low silicon-aluminum ratio (5.2) were prepared. Subsequently, high value-added ZSM-5 zeolite with a high silicon-aluminum ratio (156.6) was synthesized. Its crystallinity, purity, and specific surface area surpassed those of commercial ZSM-5 quality. The desiliconization liquid was efficiently circulated to utilize silicon source, sodium source, and water effectively. Finally, solid waste served as raw material for hydrothermal synthesis of nano-ZSM-5 zeolite using the nano seed emulsion addition method. This technical approach achieves "quasi-zero" emission for coal gasification fine slag while synthesizing high-quality zeolite that holds excellent prospects for industrial solid waste treatment.
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Acknowledgements
This study is supported by Natural Science Foundation of Ningxia Province, China (2023AAC02008);National Natural Science Foundation of China (22366031). The authors, therefore, gratefully acknowledge for their financial support.
Funding
This project was supported by the Natural Science Foundation of Ningxia Province, China (2023AAC02008);National Natural Science Foundation of China (22366031).
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Yulin Ma: Conceptualization, Data curation, Writing – original draft. Xiang Zhang: Visualization, Software, Investigation. Yifei Yang: Writing-review & editing. Lu Ma: Resources, Validation. Mei Yang: Investigation, Software. Yi Xiao: Resources, Visualization. Keren Shi: Software, Formal analysis. Yuanyuan Li: Supervision, Writing-review & editing. Yulong Ma: Writing-review & editing. Yonggang Sun: Writing – review & editing. Wenxin Ji*: Methodology, Supervision, Writing – review & editing.
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Ma, Y., Zhang, X., Yang, Y. et al. Study on the Graded Synthesis of P-Type Zeolite /Carbon Composite and ZSM-5 Zeolite from Coal Gasification Slag. Silicon (2024). https://doi.org/10.1007/s12633-024-02951-8
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DOI: https://doi.org/10.1007/s12633-024-02951-8