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从煤气化渣中合成的MCM-41的结构特征:金属杂质的影响

Shuo Yao^1,2,3, Wei Du^1,2,3, Changshuai Chen^1,2,3

¹State Key Laboratory of Coking Coal Resources Green Exploitation, China University of Mining and Technology, Xuzhou 221116, China.

|June 16, 2025

概括

这项研究从气化渣中合成了MCM-41,发现金属杂质降低了结晶性并改变了孔隙结构. 这项研究提供了关于将固体废物回收成有价值材料的见解.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

气化废渣是高价值材料的潜在二次资源.
渣中的剩余可以用于像MCM-41.1.这样的中孔材料.
废渣中的金属杂质 (Fe,Mg,Ca) 给MCM-41合成带来了挑战.

研究的目的:

来合成MCM-41从浸的气化渣上浮物.
为了研究金属杂质从渣对MCM-41结构和特性的影响.
为了比较从废渣中合成的MCM-41与从化学剂中合成的MCM-41.

主要方法:

合成MCM-41使用浸的气化废渣超.
使用X射线衍射 (XRD),扫描电子显微镜与能量分散X射线光谱 (SEM-EDS) 进行表征.
对N2吸附/脱附等热体和27Al和29Si固态核磁共振 (NMR) 光谱学的分析.

主要成果:

气化渣中的金属杂质降低了MCM-41的结晶度.
在渣衍生的MCM-41中没有观察到八面体,可能是由于阴离子替代 (Na+被Ca2+).
特定的表面积,毛孔大小和毛孔体积都减少了,这归因于金属氧化物纳米颗粒的毛孔堵塞.

结论:

气化渣中的金属杂质显著改变了合成的MCM-41的结构和纹理特性.
本研究展示了一种利用气化渣用于MCM-41生产的方法.
调查结果为有效的固体废物回收和创造增值材料提供了洞察力.

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