煤矸石复合吸附材料制备及脱硫性能

摘要煤矸石制备复合吸附材料可以实现煤矸石高值资源化利用。以煤矸石为基底材料,浒苔粉为额外碳源,采用一步炭化活化法制备活性炭多孔硅复合材料;并通过氮气吸附、扫描电镜(SEM)、傅里叶红外光谱(FTIR)、X射线衍射分析(XRD)和能谱仪(EDS)对复合材料的结构进行了表征。研究了活化剂浓度、活化温度、活化时间对复合材料吸附性能的影响,结果表明,在NaOH浓度为20%、活化温度为800 ℃、活化时间为60 min条件下制备的复合材料碘吸附性能达到703 mg·g^-1,穿透硫容达到76.5 mg·g^-1,孔径小于10 nm的介孔占比41.07%。FTIR和XRD协同发现硅元素在碱熔酸浸过程后以无定形硅存在于样品表面,浒苔引入的额外碳源和硅元素形成活性炭多孔硅复合材料;通过EDS发现在脱硫过程中S元素均匀分布在样品表面,最终合成出来的复合材料具有良好的吸附脱硫效果。

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	田宇红
	杨荣添
	张李超
	李林波

关键词：煤矸石活性炭复合材料脱硫

Abstract： The preparation of composite adsorption materials from coal gangue can realize the high value resource utilization of coal gangue. With coal gangue as the base material and enteromorpha powder as the additional carbon source, the activated carbon porous silicon composite was prepared by one-step carbonization activation method. The structure of the composite was characterized by nitrogen adsorption, scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The effects of activator concentration, activation temperature and activation time on the adsorption performance of the composite were studied. The results showed that the iodine adsorption performance and sulfur penetration capacity of the composite prepared under the conditions of 20% NaOH concentration, 800 ℃ and 60 min were 703 mg·g^-1 and 76.5 mg·g^-1, respectively. The mesoporous pore size less than 10 nm accounted for 41.07%. It was found by FTIR and XRD that the amorphous silicon existed on the surface of the sample after the acid-leaching process, and the additional carbon source introduced by Enteromorpha enteromorpha formed the activated carbon porous silicon composite. It was found by EDS that the S element was uniformly distributed on the surface of the sample during the desulphurization process, and the final composite material had good adsorption desulphurization effect.

Keywords： coal gangue activated carbon composite material desulfurization

Received 2024-02-26;

Fund:西安市科技计划项目(21XJZZ0036);陕煤联合基金项目(2019JLM-42)和国家自然科学基金项目(51504180)。

Corresponding Authors: 李林波,教授,E-mail:yj-lilinbo@xauat.edu.cn。 Email: yj-lilinbo@xauat.edu.cn

About author: 田宇红(1977—),女,博士,副教授,现从事化工、冶金资源综合利用方面的研究。

引用本文:

田宇红, 杨荣添, 张李超, 李林波.煤矸石复合吸附材料制备及脱硫性能[J]. 化学工业与工程, 2024,41(6): 120-127

TIAN Yuhong, YANG Rongtian, ZHANG Lichao, LI Linbo.Preparation and desulfurization performance of coal gangue composite adsorption material[J]. Chemcial Industry and Engineering, 2024,41(6): 120-127

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