A new method to prepare mesoporous silica from coal gasification fine slag and its application in methylene blue adsorption. (1st March 2019)

• Record Type: Journal Article
• Authors: Liu, Shuo; Chen, Xingtong; Ai, Weidong; Wei, Cundi
• Is Part Of: Journal of cleaner production. Volume 212(2019)
• Page Start: 1062
• Page End: 1071
• Publication Date: 2019-03-01
• Subjects: Coal gasification fine slag -- Mesoporous glass microspheres -- Acid leaching -- Silanol group -- Methylene blue adsorption; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.12.060
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Mesoporous silica materials are often restricted from large-scale industrial production due to their high preparation costs. This study used the solid waste coal gasification fine slag (FS) as the silica source, utilizing the simple acid leaching technology, successfully produced mesoporous glass microspheres (MGS) with specific surface area of 364 m 2 /g and pore volume of 0.339 cm 3 /g. The porous structure was confirmed by TEM. Moreover, the influences of reaction conditions on the specific surface area and pore structure were thoroughly investigated. The methylene blue adsorption test on the prepared mesoporous microspheres showed a maximum adsorption capacity of 140.57 mg/g. This research provides a new method for the industrial production of mesoporous silica. Graphical abstract: Highlights: Proposed a new method for large-scale production of mesoporous silica. Prepared mesoporous silica with specific surface area of 364 m 2 /g. Prepared mesoporous silica with surface silanol content of 1.3 unit/nm 2 . Methylene blue maximum adsorption capacity of 140.57 mg/g.