Abstract
Thermal regeneration of an activated carbon obtained from the coconut shell (AC) and saturated with methylene blue (MB) was studied using response surface methodology (RSM). Regeneration efficiency was optimized by MB adsorption capacity of regenerated activated carbon (RAC). Conditions obtained for optimal regeneration were: temperature of 635 °C, N2 flow of 100 cm 3 min-1 and time of 0.5 h, resulting in MB adsorption capacity of 457 mg g-1. The characterization of the RAC was performed from the TGA, N2 adsorption isotherms, SEM, FT-IR, XPS, Boehm method and pHdrift. The TGA analysis showed that the physisorbed MB molecules evolved during the heating, while the chemisorbed molecules become polymerized on the activated carbon. The RAC was essentially microporous and it had BET surface of 1726 m2 g-1. The chemical surface analyses showed significant changes in the functional group amount and indicating the functionalization of the RAC with nitrogen from the MB.
| Original language | English |
|---|---|
| Pages (from-to) | 53-60 |
| Number of pages | 8 |
| Journal | Journal of Analytical and Applied Pyrolysis |
| Volume | 101 |
| DOIs | |
| Publication status | Published - May 2013 |
Fingerprint
Keywords
- Activated carbon
- Methylene blue
- Response surface methodology
- Thermal regeneration
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
Cite this
Thermal regeneration study of high surface area activated carbon obtained from coconut shell : Characterization and application of response surface methodology. / Cazetta, André L.; Junior, Osvaldo P.; Vargas, Alexandro M M; Da Silva, Aline P.; Zou, Xiaoxin; Asefa, Teddy; Almeida, Vitor C.
In: Journal of Analytical and Applied Pyrolysis, Vol. 101, 05.2013, p. 53-60.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermal regeneration study of high surface area activated carbon obtained from coconut shell
T2 - Characterization and application of response surface methodology
AU - Cazetta, André L.
AU - Junior, Osvaldo P.
AU - Vargas, Alexandro M M
AU - Da Silva, Aline P.
AU - Zou, Xiaoxin
AU - Asefa, Teddy
AU - Almeida, Vitor C.
PY - 2013/5
Y1 - 2013/5
N2 - Thermal regeneration of an activated carbon obtained from the coconut shell (AC) and saturated with methylene blue (MB) was studied using response surface methodology (RSM). Regeneration efficiency was optimized by MB adsorption capacity of regenerated activated carbon (RAC). Conditions obtained for optimal regeneration were: temperature of 635 °C, N2 flow of 100 cm 3 min-1 and time of 0.5 h, resulting in MB adsorption capacity of 457 mg g-1. The characterization of the RAC was performed from the TGA, N2 adsorption isotherms, SEM, FT-IR, XPS, Boehm method and pHdrift. The TGA analysis showed that the physisorbed MB molecules evolved during the heating, while the chemisorbed molecules become polymerized on the activated carbon. The RAC was essentially microporous and it had BET surface of 1726 m2 g-1. The chemical surface analyses showed significant changes in the functional group amount and indicating the functionalization of the RAC with nitrogen from the MB.
AB - Thermal regeneration of an activated carbon obtained from the coconut shell (AC) and saturated with methylene blue (MB) was studied using response surface methodology (RSM). Regeneration efficiency was optimized by MB adsorption capacity of regenerated activated carbon (RAC). Conditions obtained for optimal regeneration were: temperature of 635 °C, N2 flow of 100 cm 3 min-1 and time of 0.5 h, resulting in MB adsorption capacity of 457 mg g-1. The characterization of the RAC was performed from the TGA, N2 adsorption isotherms, SEM, FT-IR, XPS, Boehm method and pHdrift. The TGA analysis showed that the physisorbed MB molecules evolved during the heating, while the chemisorbed molecules become polymerized on the activated carbon. The RAC was essentially microporous and it had BET surface of 1726 m2 g-1. The chemical surface analyses showed significant changes in the functional group amount and indicating the functionalization of the RAC with nitrogen from the MB.
KW - Activated carbon
KW - Methylene blue
KW - Response surface methodology
KW - Thermal regeneration
UR - http://www.scopus.com/inward/record.url?scp=84876169201&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876169201&partnerID=8YFLogxK
U2 - 10.1016/j.jaap.2013.02.013
DO - 10.1016/j.jaap.2013.02.013
M3 - Article
VL - 101
SP - 53
EP - 60
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
SN - 0165-2370
ER -