Optimized preparation of activated carbon nanoparticles from acrylic fibrous wastes

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• 作者：Vijay Baheti ; Salman Naeem ; Jiri Militky ; Malgorzata Okrasa…
• 关键词：Acrylic fiber waste ; Pyrolysis ; Activated carbon ; Response surface model ; Optimization ; Ball milling ; Carbon nanoparticles
• 刊名：Fibers and Polymers
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：16
• 期：10
• 页码：2193-2201
• 全文大小：825 KB
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• 作者单位：Vijay Baheti (2)
  Salman Naeem (2)
  Jiri Militky (2)
  Malgorzata Okrasa (1)
  Blanka Tomkova (2)
  
  2. Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Liberec, 46117, Czech Republic
  1. Department of Personal Protective Equipment, Central Institute for Labour Protection, Lodz, 90-133, Poland
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  
• 出版者：The Korean Fiber Society
• ISSN：1875-0052

文摘

In present study, activated carbon is prepared by controlled pyrolysis of acrylic fibrous waste under the layer of charcoal using physical activation in high temperature furnace. The main objective is to study the effect of four factors (i.e. final pyrolysis temperature, holding time at final temperature, heating rate per hour, and number of steps) on carbonization behavior of acrylic fibrous waste. The Box-Behnken design and response surface modeling was performed to get higher specific surface area and higher electrical conductivity. The development of porous morphology having higher surface area is found to increase with increase in pyrolysis temperature, increase in number of steps, decrease in holding time and decrease in heating rate till some optimum value. This behavior is attributed to gradual reaction of atmospheric oxygen with carbonized acrylic fibrous waste, which resulted into the opening of previously inaccessible pores through the removal of tars and disorganised carbon. Moreover, these four factors also found to have significant effect on the development of electrical conductivity of activated carbon. Later on, the carbonized acrylic fibrous waste was pulverized in dry conditions by high energy planetary ball milling to get activated carbon nanoparticles. In addition to refinement of size, the specific surface area and electrical conductivity of pulverized carbon particles was found to increase with increase in milling time. The activated carbon particles obtained after three hours of dry milling revealed the particle size of 521 nm, the electrical conductivity of 21.78 s/m for 0.5 wt % concentration of aqueous dispersion and the specific surface area of 432 m2/g.