Study on Preparation of Activated Carbon Precursor from Medium Temperature Coal Tar Pitch

Abstract:

In order to explore the optimal method to prepare high performance activated carbon precursors from medium temperature coal tar pitch, orthogonal tests are adopted to study the effects of oxygen-blowing time in the pretreatment process as well as carbonization temperature and carbonization time in activation and carbonization processes on the adsorption capacities of activated carbon. Moreover, the effects of additives (coke powder and anionic surfactant) on the adsorption capacities of activated carbon are examined. The results show that the factors affecting the adsorption capacities of pitch-based activated carbon, in order of importance, are carbonization temperature, oxygen-blowing time, carbonization time and additives. The optimal conditions for preparation of activated carbon precursor from medium temperature pitch are: 4h for oxygen-blowing time, 400°C for carbonization temperature, 60 minutes for carbonization time and no additives. The iodine absorption capacity of the prepared activated carbon precursor which is activated for 100 min at 800°C is 1739mg/g.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 712-715
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.712
• Online since: August 2013
• Authors: Shu Guang Ouyang*, Rong Guang Xu
• Keywords: High Performance Activated Carbon, Medium Temperature Coal Tar Pitch, Orthogonal Test, Precursor

References

[1] E. Grigorova, Ts. Mandzhukova, B. Tsyntsarski, et al, Effect of activated carbons derived from different precursors on the hydrogen sorption properties of magnesium, Fuel Processing Technology 92 (2011) 1963–1969.

DOI: 10.1016/j.fuproc.2011.05.016

[2] Mei-xian WANG, Cheng-yang WANG, Ming-ming CHEN, et al, Preparation of high-performance activated carbons for electric double layer capacitors by KOH activation of mesophase pitches, New Carbon Materials 25 (2010) 285–290.

DOI: 10.1016/s1872-5805(09)60034-2

[3] Bilyana Petrova, Boyko Tsyntsarski, Temenuzhka Budinova, et al, Activated carbon from coal tar pitch and furfural for the removal of p-nitrophenol and m-aminophenol, Chemical Engineering Journal 172 (2011) 102– 108.

DOI: 10.1016/j.cej.2011.05.075

[4] N.G. Asenjo, C. Botas, C. Blanco, et al, Synthesis of activated carbons by chemical activation of new anthracene oil-based pitches and their optimization, Fuel Processing Technology 92 (2011) 1987–1992.

DOI: 10.1016/j.fuproc.2011.05.021

[5] D. Lozano-Castello, J. Alcaniz-Monge, D. Cazorla-Amoro´s, et al, Adsorption properties of carbon molecular sieves prepared from an activated carbon by pitch pyrolysis, Carbon 43 (2005) 1643–1651.

DOI: 10.1016/j.carbon.2005.01.042

[6] Luo Heming, Feng Huixia, Wang Yi, et al, Prepara tion of Activa ted Carbon from coke powder and its application, Environmental Protection of Chemical Industry 27(2007) 481-483.

[7] ZHANG Libo, PENG Jinhui, TU Jianhua, et al, Production and characterization of activated carbon from tobacco stems by potassium hydroxide activation, Chemical Industry and Engineering Progress 25(2006) 415-419.

[8] C. Blanco, R. Santamar´ıa, J. Bermejo, et al, A comparative study of air-blown and thermally treated coal-tar pitches, Carbon 38 (2000) 517–523.

DOI: 10.1016/s0008-6223(99)00131-1

[9] S.-M. Oh, Y.-D. Park, Comparative studies of the modification of coal-tar pitch, Fuel 78 (1999) 1859–1865.

DOI: 10.1016/s0016-2361(99)00093-9

[10] B. Petrova, T. Budinova, N. Petrov, et al, Effect of different oxidation treatments on the chemical structure and properties of commercial coal tar pitch, Carbon 43 (2005) 261–267.

DOI: 10.1016/j.carbon.2004.09.006

[11] XU Bin, LI Tie-hu, Effect of modif ication of mesophase pitches on performance of ultra- high surface area activated carbons with nanometer level micropore, Material Science and Technology 11 (2003) 434–437.