05/02008 Study of SO2 adsorption and thermal regeneration over activated carbon-supported copper oxide catalysts

The activated carbon loaded copper oxide catalyst was prepared from Hainan abandoned coconut shells using chemical activation method and applied in treatment of acid bright red GR simulation dyeing wastewater. The effects of phosphoric acid concentration, ratio of liquid to solid, activation time and activation temperature on the COD and color removal rates were investigated by orthogonal experiment. The results showed that the optimal values of the parameters above were 65% (in mass), 3:1, 2.5h and 500°C under the designed copper oxide loading conditions of calcining temperature 300°C,calcining time 3.0 h and use level of copper nitrate 15 mL. Using the prepared sample for the treatment of the wastewater, the COD and color removal rates reached 94.384% and 99.840%, respectively.

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Study on Thermal Regeneration for Caffeine-Saturated Activated Carbon

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.781-784.1941 ◽

2013 ◽

Vol 781-784 ◽

pp. 1941-1944 ◽

Cited By ~ 1

Author(s):

Zhao You Zhu ◽

Li Li Wang ◽

Wan Ling Wang ◽

Ying Long Wang

Keyword(s):

Activated Carbon ◽

Carbon Layer ◽

Carbon Surface ◽

Optimum Conditions ◽

Gas Velocity ◽

Thermal Regeneration ◽

Regeneration Time ◽

Before And After ◽

Carbon Regeneration ◽

Carrier Gas Velocity

Waste activated carbon (AC) containing caffeine was produced during the process of the production for caffeine. The process of treatment caffeine-saturated AC using thermal regeneration was explored and factors on the regeneration of activated carbon were investigated. The optimum conditions obtained were: temperature is 650 °C, the regeneration time is 180 min, the carrier gas velocity is 0.002 m/s, carbon layer thickness is 0.1 m. Under these conditions, activated carbon regeneration efficiency reached 90.3%. In addition, the pore structure of activated carbon before and after regeneration was characterized and the activated carbon surface area and pore size distribution under optimum conditions were determined by the adsorption isotherms.

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Comparison of chemical and thermal regeneration of aromatic compounds on exhausted activated carbon

Water Science & Technology ◽

10.2166/wst.1997.0287 ◽

1997 ◽

Vol 35 (7) ◽

pp. 279-285 ◽

Cited By ~ 22

Author(s):

P. C. Chiang ◽

E. E. Chang ◽

J. S. Wu

Keyword(s):

Molecular Structure ◽

Activated Carbon ◽

Physicochemical Properties ◽

Adsorption Capacity ◽

Aromatic Compounds ◽

Thermal Regeneration ◽

Desorption Efficiency ◽

Chemical Regeneration

In this investigation, nine typical compounds, i.e., phenol, 2-aminophenol, aniline, 2-chlorophenol, chlorobenzene, β-naphthol, naphthalene, α-naphthylamine and α-chloronaphthalene were introduced to evaluate the effects of the molecular structure and physicochemical properties of these selected adsorbates on the adsorption capacity and desorption efficiency of the activated carbon. Both the thermal and chemical regeneration methods were employed to compare the regeneration efficiencies among these adsorbates and adsorbent.

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