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Partial Oxidative Gasification of Coking Wastewater in Supercritical Water

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Abstract:

Partial oxidative gasification of coking wastewater in supercritical water was investigated in a batch reactor. The effects of temperature (380 - 460 °C) and oxygen ratio (OR) (0 - 0.8) on gaseous composition and removal efficiencies of organic carbon (TOC), ammonia nitrogen (NH3-N) and volatile phenol (VP) were studied. Results show that temperature greately enhanced the mole fraction of H2 and the removal efficiencies of COD, VP and NH3-N. The highest mole fraction of H2 was obtained at OR of 0.2, higher OR promoted the oxidation of H2 and CH4 to CO2. At 460 °C, 25 MPa and OR of 0.2, the mole fraction H2, CO, CH4 and CO2 were 56.88%, 1.17%, 7.82% and 34.13%, respectively. The removal efficiency of TOC, VP and NH3-N reached 81.37%, 86.09% and 47.63%, respectively.

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Advanced Research on Material Engineering, Chemistry and Environment View Preview

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Periodical:

Advanced Materials Research (Volume 788)

Pages:

409-412

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.788.409

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Online since:

September 2013

Authors:

Yu Zhen Wang, Shu Zhong Wang, Yang Guo, Yan Meng Gong, Xing Ying Tang, Jie Zhang

Keywords:

Coking Wastewater, Gasification, Partial Oxidative, Supercritical Water

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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