Thermal regeneration of activated carbon saturated with nitrate ions from an artisanal furnace

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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Thermal regeneration of a spent activated carbon previously used as hydrogen sulfide adsorbent

Carbon ◽

10.1016/s0008-6223(00)00266-9 ◽

2001 ◽

Vol 39 (9) ◽

pp. 1319-1326 ◽

Cited By ~ 82

Author(s):

Andrey Bagreev ◽

Habibur Rahman ◽

Teresa J Bandosz

Keyword(s):

Hydrogen Sulfide ◽

Activated Carbon ◽

Thermal Regeneration

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Regeneration Performance of Activated Carbon for Desulfurization

Applied Sciences ◽

10.3390/app10176107 ◽

2020 ◽

Vol 10 (17) ◽

pp. 6107

Author(s):

Zhiguo Sun ◽

Menglu Wang ◽

Jiaming Fan ◽

Yue Zhou ◽

Li Zhang

Keyword(s):

Activated Carbon ◽

Material Surface ◽

Test Results ◽

Optimal Conditions ◽

Adsorption Efficiency ◽

Thermal Regeneration ◽

So2 Removal ◽

Sulfur Capacity ◽

Desulfurization Efficiency ◽

High Level

This study explored the regenerated performance of activated carbon (AC) as SO2 adsorbent. The optimal conditions of SO2 removal were determined by experiment, and then the adsorption efficiency of AC was studied by a method of thermal regeneration. The characteristics of regenerated AC were analyzed by Brunauer-Emmett-Teller (BET) and Scanning Electron Microscopy (SEM) methods. The test results showed that the most suitable adsorption conditions were using 4 g of activated carbon, 1.65 L/min gas flue rate, and 5% O2. During the ten regenerations, the desulfurization efficiency and sulfur capacity of AC still maintained a high level. The characterization results showed that the increase of material surface area and pore volume were 101 m2 g−1, and 0.13 cm3 g−1, respectively, after the cycles.

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