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微波和超声波辅助下盐酸/氟化钠浸出褐煤脱灰的研究

Study on the Deashing of Lignite with Hydrochloric Acid/Sodium Fluoride Leaching, Assisted by Microwave and Ultrasonic Waves.

作者信息

Ran Xinming, Yuan Jie

机构信息

College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China.

School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China.

出版信息

Materials (Basel). 2024 Jul 17;17(14):3537. doi: 10.3390/ma17143537.

DOI:10.3390/ma17143537
PMID:39063829
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11279183/
Abstract

This study was aimed at investigating the effects of adding sodium fluoride (NaF) and using the assistance of ultrasonic and microwave energy on the removal efficiency of ash content during the hydrochloric acid (HCl) chemical leaching process of lignite samples from Zhaotong, Yunnan, China. Chemical leaching was conducted on lignite samples from Zhaotong, Yunnan, China, under the experimental conditions of time (30-120 min), temperature (55-95 °C), microwave power (240-800 W), ultrasonic power (25-100%), and NaF addition concentration (0.2-1.2 M). The addition of NaF greatly improved the removal efficiency of ash content from lignite. Under optimized conditions, the addition of NaF increased the removal rate of ash content from lignite from 25% to 65.27%. The microwave-assisted deashing of lignite can significantly improve the deashing efficiency, with positive implications for the microstructure regulations of lignite. Ultrasonic-assisted deashing can lower the temperature for coal powder burnout and enhance the combustion performance of coal.

摘要

本研究旨在考察添加氟化钠（NaF）以及利用超声和微波能量辅助对中国云南昭通褐煤样品盐酸（HCl）化学浸出过程中灰分去除效率的影响。在中国云南昭通的褐煤样品上进行化学浸出，实验条件包括时间（30 - 120分钟）、温度（55 - 95°C）、微波功率（240 - 800瓦）、超声功率（25 - 100%）以及NaF添加浓度（0.2 - 1.2 M）。添加NaF极大地提高了褐煤中灰分的去除效率。在优化条件下，添加NaF使褐煤中灰分的去除率从25%提高到了65.27%。微波辅助褐煤脱灰能显著提高脱灰效率，对褐煤微观结构调控具有积极意义。超声辅助脱灰可降低煤粉燃尽温度并提高煤的燃烧性能。

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本文引用的文献

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