Journal
FUEL PROCESSING TECHNOLOGY
Volume 162, Issue -, Pages 13-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2017.03.017
Keywords
Activated carbon; Oily sludge; High specific surface area; Adsorption capability
Funding
- National Natural Science Foundation of China [51576172]
- National Science & Technology Pillar Program [2012BAB09B03]
- National High Technology Research and Development Program [2012AA063505]
- Environment Protection Special Funds for Public Welfare [201509013]
- Program for Introducing Talents of Discipline to University [B08026]
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To convert the hazardous oily sludge into high quality activated carbon for water pollutant adsorption, a new preparing procedure has been proposed in current study by adding a de-oiling step before activation. The pore structure and surface chemistry of produced active carbons (ACs) were characterized by scanning electron microscopy, N-2 adsorption-desorption, XRD, FTIR and XPS. Due to the high content of asphaltene, oily sludge is a promising material for activated carbon production. The surface area of the activated carbon prepared with the proposed de-oiling step was 3292 m(2)/g which was two times higher than that of normally prepared AC. Moreover, by applying the de-oiling step, the methylene blue adsorption capacities significantly increased from 17.8 mL/0.1 g to 64.6 mL/0.1 g reaching that of ACs generated from commercial asphalt. Moreover, the heavy metal leaching values of the ACs prepared were far below that of hazardous materials. Therefore, the oily sludge could be promising raw material for activated carbon production and the de-oiling procedure could improve the quality of ACs significantly. (C) 2017 Elsevier B.V. All rights reserved.
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