Optimal temperatures for catalytic regeneration of activated carbon

TY - JOUR

T1 - Optimal temperatures for catalytic regeneration of activated carbon

AU - Matatov-Meytal, Yu I.

AU - Sheintuch, M.

AU - Shter, G. E.

AU - Grader, G. S.

N1 - Funding Information: Acknowledgemenfs-This research was supported by The Water Research Institute, Ministry of Science and Art and Ministry of Environment of Israel.

PY - 1997

Y1 - 1997

N2 - Activated carbons impregnated with a mixture of copper(II), iron(III) and chromium(III) oxide catalysts were prepared in order to facilitate catalytic regeneration of AC saturated with phenols. The temperature ranges of phenol oxidation (Tp), carbon oxidation (Tc) and carbon burn-off were determined from DTA/TGA investigations in oxidizing and inert atmospheres. The impregnated catalyst facilitated phenol oxidation but also lowered the Tc of the AC. Catalytic regeneration can be conducted between Tp (220-240°C) and Tc (320-370°C). Catalytic regeneration of spent impregnated carbon, at 270°C in flowing air, restored almost all of its initial adsorption capacity and specific surface area while in the absence of a catalyst the regeneration achieved was only 25-30%. The results obtained from the polythermic investigations (DTA/TGA) correlate well with those from the regeneration experiments and, therefore, may be used for determination of temperature conditions for catalytic regeneration of saturated carbons.

AB - Activated carbons impregnated with a mixture of copper(II), iron(III) and chromium(III) oxide catalysts were prepared in order to facilitate catalytic regeneration of AC saturated with phenols. The temperature ranges of phenol oxidation (Tp), carbon oxidation (Tc) and carbon burn-off were determined from DTA/TGA investigations in oxidizing and inert atmospheres. The impregnated catalyst facilitated phenol oxidation but also lowered the Tc of the AC. Catalytic regeneration can be conducted between Tp (220-240°C) and Tc (320-370°C). Catalytic regeneration of spent impregnated carbon, at 270°C in flowing air, restored almost all of its initial adsorption capacity and specific surface area while in the absence of a catalyst the regeneration achieved was only 25-30%. The results obtained from the polythermic investigations (DTA/TGA) correlate well with those from the regeneration experiments and, therefore, may be used for determination of temperature conditions for catalytic regeneration of saturated carbons.

KW - A. Activated carbon

KW - B. Impregnation

KW - C. Adsorption

KW - C. Thermal analysis

KW - D. Catalytic properties

UR - http://www.scopus.com/inward/record.url?scp=0031386409&partnerID=8YFLogxK

U2 - 10.1016/S0008-6223(97)00103-6

DO - 10.1016/S0008-6223(97)00103-6

M3 - 文章

AN - SCOPUS:0031386409

SN - 0008-6223

VL - 35

SP - 1527

EP - 1531

JO - Carbon

JF - Carbon

IS - 10-11

ER -