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Toluene Adsorption on Various Types of Activated Carbon Fibers



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  • Personal Author:
  • Description:
    Activated carbon fiber (ACF) has been demonstrated to be a good adsorbent for the removal of organic vapors in air. ACF has a large surface area and high absorption capacity when compared with granular activated carbon (GAC) commonly used in respiratory protection devices. ACF is an attractive alternative adsorbent to GAC because of its ease of handling, light weight, and dropping cost. ACF may offer the potential for short-term respiratory protection for first responders and emergency personnel. This study compared the critical bed depths and adsorption capacities for toluene among GAC and ACF of different forms and surface areas. GAC and ACF in cloth (ACFC) and felt (ACFF) forms were challenged in stainless steel chambers with a constant concentration of 500 ppm toluene via conditioned air at 25 degrees C, 50% RH, and constant airflow (7 LPM). Breakthrough data were obtained for each adsorbent using gas chromatography with flame ionization detector. The surface areas of each adsorbent were determined using a physisorption analyzer. The results showed that the critical bed depth of GAC is 275% higher than the average of ACFC but is 55% lower than the average of ACFF. The adsorption capacity of GAC (with surface area of 1800 m2/g) at 50% breakthrough is 25% higher than the average of ACF with surface area of 1000 m2/g, while the rest of ACF with surface area of 1500 m2/g and higher have 40% higher adsorption capacities than GAC. ACFC with higher surface area has the smallest critical bed depth and highest adsorption capacity, which makes it a good adsorbent for thinner and lighter respirators. It was concluded that ACF has great potential for application in respiratory protection considering its higher adsorption capacity and lower critical bed depth, in addition to its advantages over GAC, particularly for ACF with higher surface area. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Publisher:
    American Industrial Hygiene Association
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Abstract or Summary
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    27
  • NIOSHTIC Number:
    nn:20057457
  • Citation:
    AIHce 2010: American Industrial Hygiene Conference and Exposition, May 22-27, 2010, Denver, Colorado. Falls Church, VA: American Industrial Hygiene Association, 2010 May; :27
  • CAS Registry Number:
    Toluene (CAS RN 108-88-3)
  • Federal Fiscal Year:
    2010
  • Performing Organization:
    University of Alabama at Birmingham
  • Peer Reviewed:
    False
  • Start Date:
    20050803
  • Source Full Name:
    AIHce 2010: American Industrial Hygiene Conference and Exposition, May 22-27, 2010, Denver, Colorado
  • End Date:
    20100731
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:f918f4845249cd06a61411fd30daba66a07a9db22be87dfb1e37d4c2fd7da9ad92824cb87b1d9dee4e7749e5a78b5438085066cec79f6eae2afaab9697c5c71d
  • Download URL:
  • File Type:
    Filetype[PDF - 158.89 KB ]
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