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Regulation of pore size distribution in coal-based activated carbon
Gong Guo-zhuo2,3; Xie Qiang1; Zheng Yan-feng1; Ye Shu-feng2; Chen Yun-fa2; Xie, Q
AbstractAn approach to regulating the pore size distribution of coal-based activated carbon was proposed and studied by potassium-catalyzed steam activation. Activated carbons were prepared from coal in the presence of different amounts of KOH in the raw materials, and in the process of which, delicate acid washing was performed to change the amount Of K-containing compounds left in chars after carbonization and before steam activation. Then, the activated carbons were characterized by nitrogen adsorption, scanning electron microscopy, and X-Ray energy spectrometry, and their adsorption capacity was determined. Results show that the content of K-containing compounds left in the char can be controlled jointly by changing the amount of KOH added to the precursor and subsequent washing with 5% mass fraction acid after carbonization. With increasing amount of KOH, the adsorption capacity of the resulting activated carbon becomes greater. The average pore size of the activated carbons gradually increases from 2.379 to 2.636 nm, and the mesoporosity increases front 30.9 to 46.1%. The principles for the regulation of pore size distribution in activated carbon were discussed.
KeywordPore Size Distribution Koh Acid Washing Coal-based Activated Carbon Sem/edax
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000267634200009
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Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorXie, Q
Affiliation1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gong Guo-zhuo,Xie Qiang,Zheng Yan-feng,et al. Regulation of pore size distribution in coal-based activated carbon[J]. NEW CARBON MATERIALS,2009,24(2):141-146.
APA Gong Guo-zhuo,Xie Qiang,Zheng Yan-feng,Ye Shu-feng,Chen Yun-fa,&Xie, Q.(2009).Regulation of pore size distribution in coal-based activated carbon.NEW CARBON MATERIALS,24(2),141-146.
MLA Gong Guo-zhuo,et al."Regulation of pore size distribution in coal-based activated carbon".NEW CARBON MATERIALS 24.2(2009):141-146.
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