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Title: Preparation and characterization of pitch-based nanoporous carbons for improving CO{sub 2} capture

Pitch is considered a promising low-cost carbon precursor. However, when pitch is pyrolyzed, it forms polycrystalline graphite, which is non-porous, and therefore, not useful for CO{sub 2} adsorption. In this work, pitch was chemically activated to obtain a large specific surface area and micropore volume. Varying weight ratios of KOH (i.e., 0, 1, 2, and 3) were used as the activating agent. The characteristics of the samples were investigated using scanning electron microscopy (SEM), N{sub 2}/77 K adsorption isotherms, and X-ray diffraction (XRD). The CO{sub 2} adsorption performance was studied by isothermal adsorption/desorption measurements. The results showed that an increase in specific surface areas and total pore volumes of pitch-based nanoporous carbons, resulted in an enhancement of CO{sub 2} adsorption capacity. - Graphical abstract: This is the surface morphologies of pitch precursor and pitch-derived activated carbon (AC-2). - Highlights: • Pitch is considered a promising low-cost carbon precursor. • Specific surface area: 1442 m{sup 2}/g and micropore volume: 0.504 cm{sup 3}/g. • CO{sub 2} adsorption capacity showed 203 mg/g (@ RT/1 bar)
Authors:
;  [1] ; ; ;  [2] ;  [3] ;  [1]
  1. Department of Chemistry, Inha University, 100 Inharo, Nam-gu, Incheon (Korea, Republic of)
  2. GS Caltex Corporation, Munji-dong, Yuseong-gu, Daejeon (Korea, Republic of)
  3. Industrial Liaison Research Institute, Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin (Korea, Republic of)
Publication Date:
OSTI Identifier:
22334282
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 215; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACTIVATED CARBON; ADSORPTION; ADSORPTION ISOTHERMS; CARBON DIOXIDE; CHEMICAL PREPARATION; DESORPTION; GRAPHITE; POLYCRYSTALS; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION