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Photocatalytic Regeneration of Exausted Activated Carbon With Gas-Solid Fluidized-Bed Reactor(PDF)

《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2012年02期
Page:
56-60
Research Field:
化学
Publishing date:

Info

Title:
Photocatalytic Regeneration of Exausted Activated Carbon With Gas-Solid Fluidized-Bed Reactor
Author(s):
Ren JiankunChen LeShi QianWang YupingPeng Panying
School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210097,China
Keywords:
S - TiO2 gas-solid fluidized-bedphotocatalytic regenerationregeneration mechanism
PACS:
O643.36
DOI:
-
Abstract:
The modified activated carbon loaded with S - TiO2 was synthesized by sol-gel method,and it was a kind of new activated carbon absorbent. The technical feasibility of photocatalytic regeneration for activated carbon saturated with MB with gas-solid fluidized-bed reactor was investigated by using S - TiO2 as photocatalysts. The factors affecting the regeneration efficiency of the activated carbon were investigated,including modifying conditions,regeneration times,photocatalyst modification,and adsorption-regeneration cycles. Based on the regeneration rate of activated carbon under different conditions,the regeneration mechanism was discussed. It was possible to regenerate the activated carbon through photocatalytic oxidation with gas-solid fluidized-bed reactor. The MB adsorption capacity of activated carbon calcinated at 450℃ with 6. 5% ( S - TiO2 ) loading could be recovered by 65. 8%,when irradiated by 250 W UV lamp for 12 h. The difference of MB concentration between interior and exterior of activated carbon was the main driving force for photocatalytic regeneration.

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Last Update: 2013-03-11