The supernatant solution of silicate species extracted from coal fly ash (CFA) by NaOH fusion is used under acidic conditions with surfactant pluronic P‐123 to prepare the mesoporous silica (SBA‐15). Structural properties of prepared SBA‐15 are found close to those prepared by pure chemicals. Furthermore, the synthesized mesoporous silica (SBA‐15) from CFA is used as support in Fischer–Tropsch synthesis (FTS). The obtained mesoporous material has a surface area of 643 m²/g and a pore size of 8.24 nm. Co–Fe bimetallic catalyst containing 15 wt% of cobalt and 5 wt% of iron is prepared by incipient wetness impregnation of cobalt nitrate and iron nitrate salts over CFA‐derived SBA‐15. These mesoporous support and catalyst are characterized by X‐ray diffraction (XRD), N₂ adsorption–desorption, H₂‐temperature‐programmed reduction (TPR), NH₃‐temperature‐programmed desorption (TPD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). FTS experiment is showing 65.53% of C₅₊ selectivity. The results indicate that the nanosubstrate material derived from CFA may be used as support for FTS activity with further improvements.

中文翻译：

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粉煤灰衍生的中孔SBA-15作为支撑材料，用于通过费-托路线生产液态烃

在酸性条件下，通过表面活性剂Puronic P-123从粉煤灰（CFA）提取的粉煤灰（CFA）中提取的硅酸盐物种的上清液用于制备中孔二氧化硅（SBA-15）。发现制备的SBA-15的结构性质与纯化学品制备的结构性质接近。此外，由CFA合成的中孔二氧化硅（SBA-15）用作费托合成（FTS）的载体。所得的介孔材料的表面积为643m ² / g，孔径为8.24nm。含有15 wt％的钴和5 wt％的铁的Co-Fe双金属催化剂是通过将湿润的硝酸钴和硝酸铁盐浸渍在源自CFA的SBA-15上而制备的。这些介孔载体和催化剂的特征在于X射线衍射（XRD），N ₂吸附-解吸，H _2-程序升温还原（TPR），NH _3-程序升温还原（TPD），场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）。FTS实验表明，C _5+的选择性为65.53％。结果表明，衍生自CFA的纳米底物材料可以用作FTS活性的支持物，并具有进一步的改进。