Open AccessAdsorption of Volatile Organic Compounds in Nitrogen Streams on Oxidized Activated Carbon Fibres
Author(s) -
Feiyu Kang,
ZhengHong Huang,
Qiang Cai,
Junbing Yang,
Hui Wu
Publication year - 2001
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1260/0263617011494286
Subject(s) - chemistry , adsorption , vapours , activated carbon , benzene , gravimetric analysis , nitrogen , x ray photoelectron spectroscopy , viscose , inorganic chemistry , volatile organic compound , specific surface area , carbon fibers , organic chemistry , chemical engineering , polymer chemistry , catalysis , neuroscience , engineering , composite number , composite material , materials science , biology
Viscose rayon-based activated carbon fibres (ACFs) with low and high specific surface areas were treated with conc. HNO 3 , 30 wt% H 2 O 2 and air at different temperatures. The pore textures and surface chemistries of the samples were characterized by nitrogen adsorption at 77 K and X-ray photoelectron spectroscopic (XPS) methods. The adsorption of traces of volatile organic compounds (VOCs), i.e. benzene and methyl ethyl ketone (MEK), in nitrogen streams on the samples wwa measured by a gravimetric method. The results showed that the surface oxygen complexes and pore textures of all the oxidized ACFs were modified and differed depending on whether oxidation had been conducted under gaseous or solution conditions. ACFs with different specific surface areas possessed different adsorption characteristics towards VOC vapours after subjection to oxidation treatment.
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