TY - JOUR
T1 - Pyrolysis of orange waste
T2 - A thermo-kinetic study
AU - Lopez-Velazquez, M. A.
AU - Santes, V.
AU - Balmaseda, J.
AU - Torres-Garcia, E.
PY - 2013/1
Y1 - 2013/1
N2 - Thermal and kinetic decomposition of orange waste have been investigated by simultaneous TGA-DSC and TGA-FTIR analysis techniques under nitrogen atmosphere. Thermal profile degradation can be interpreted as the resultant of multiple, parallel and simultaneous reactions, related to: (i) dehydration process for temperatures ≤120 °C; (ii) pyrolytic cracking, from 125 to 450 °C, stage where the ligno-cellulosic components are degraded reaching a maximum the evolved gaseous products and delivery energy; and (iii) to latest stage of lignin degradation, at temperatures ≥450 °C. The volatile compounds evolved from 50 to 600 °C were mainly: H2O, CO 2 and CO, besides of a mixture organic product composed by: carboxylic acids, aldehydes or ketones (CO), alkanes (CC), ethers (COC), alcohols (COH), phenolic compounds (CO) and aliphatic and/or unsaturated aromatic compounds (CC). Kinetic parameters were calculated by two kinds of model-free kinetics algorithms, Friedman (F) and Kissinger-Akahira-Sunose (KAS) methods at different heating rates (5, 10 and 15 °C min-1). The results in terms of activation energy show the complex Ea(α) on α dependence, which evidences an multi-step kinetic processes during the pyrolytic cracking of the orange waste.
AB - Thermal and kinetic decomposition of orange waste have been investigated by simultaneous TGA-DSC and TGA-FTIR analysis techniques under nitrogen atmosphere. Thermal profile degradation can be interpreted as the resultant of multiple, parallel and simultaneous reactions, related to: (i) dehydration process for temperatures ≤120 °C; (ii) pyrolytic cracking, from 125 to 450 °C, stage where the ligno-cellulosic components are degraded reaching a maximum the evolved gaseous products and delivery energy; and (iii) to latest stage of lignin degradation, at temperatures ≥450 °C. The volatile compounds evolved from 50 to 600 °C were mainly: H2O, CO 2 and CO, besides of a mixture organic product composed by: carboxylic acids, aldehydes or ketones (CO), alkanes (CC), ethers (COC), alcohols (COH), phenolic compounds (CO) and aliphatic and/or unsaturated aromatic compounds (CC). Kinetic parameters were calculated by two kinds of model-free kinetics algorithms, Friedman (F) and Kissinger-Akahira-Sunose (KAS) methods at different heating rates (5, 10 and 15 °C min-1). The results in terms of activation energy show the complex Ea(α) on α dependence, which evidences an multi-step kinetic processes during the pyrolytic cracking of the orange waste.
KW - Bio-energetic
KW - Kinetics
KW - Ligno-cellulosic
KW - Pyrolysis of orange waste
KW - TGA-FTIR
UR - http://www.scopus.com/inward/record.url?scp=84871716590&partnerID=8YFLogxK
U2 - 10.1016/j.jaap.2012.09.016
DO - 10.1016/j.jaap.2012.09.016
M3 - Artículo
SN - 0165-2370
VL - 99
SP - 170
EP - 177
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
ER -