Carbon-mineral adsorbents with a diatomaceous earth/perlite matrix modified by carbon deposits

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• 作者：J. Skubiszewska-Zi臋ba^a ; ^{jskubisz@o2.pl} ; B. Charmas^a ; R. Leboda^a ; V.M. Gun&rsquo ; ko^b
• 关键词：Diatomaceous earth ; Perlite ; Carbon-mineral adsorbent ; Porous structure ; TG/DTA
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：1 July, 2012
• 卷：156
• 期：Complete
• 页码：209-216
• 文件大小：1367 K

摘要

Carbon-mineral adsorbents (CMA) were prepared using complex diatomaceous earth/perlite adsorbent spent in purification of apple juice and carbonized with addition of starch or glucose to enhance the content of carbon deposits and to develop the porosity of the CMA. The specific surface area of the carbon deposits was 500-640 m²/g at the pore volume V_p = 0.28-0.35 cm³/g depending on the type of an additive and the amounts of grafted carbon. Carbon deposits in CMA represent nanoparticles (nanodeposits) totally covering a surface of the mineral matrix. Thermal stability of these nanoparticles is lower than that of larger microparticles of activated carbon (AC) or carbon black. Contribution of aromatic structures with C atoms with the sp² hybridization is larger in CMA than AC but smaller than in graphitized carbon black.