Heavy fuel oil pyrolysis and combustion: kinetics and evolved gases investigated by TGA-FTIR
Name:
1-s2.0-S0165237017304734-main.pdf
Size:
1.864Mb
Format:
PDF
Description:
Accepted Manuscript
Type
ArticleAuthors
Abdul Jameel, Abdul Gani
Han, Yunqing
Brignoli, Omar
Telalovic, Selvedin
Elbaz, Ayman M.
Im, Hong G.

Roberts, William L.

Sarathy, Mani

KAUST Department
Chemical Engineering ProgramClean Combustion Research Center
Combustion and Pyrolysis Chemistry (CPC) Group
Computational Reacting Flow Laboratory (CRFL)
KAUST Catalysis Center (KCC)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
high-pressure combustion (HPC) Research Group
Date
2017-08-24Online Publication Date
2017-08-24Print Publication Date
2017-09Permanent link to this record
http://hdl.handle.net/10754/625407
Metadata
Show full item recordAbstract
Heavy fuel oil (HFO) obtained from crude oil distillation is a widely used fuel in marine engines and power generation technologies. In the present study, the pyrolysis and combustion of a Saudi Arabian HFO in nitrogen and in air, respectively, were investigated using non-isothermal thermo-gravimetric analysis (TGA) coupled with a Fourier-transform infrared (FTIR) spectrometer. TG and DTG (differential thermo-gravimetry) were used for the kinetic analysis and to study the mass loss characteristics due to the thermal degradation of HFO at temperatures up to 1000°C and at various heating rates of 5, 10 and 20°C/min, in air and N2 atmospheres. FTIR analysis was then performed to study the composition of the evolved gases. The TG/DTG curves during HFO combustion show the presence of three distinct stages: the low temperature oxidation (LTO); fuel decomposition (FD); and high temperature oxidation (HTO) stages. The TG/DTG curves obtained during HFO pyrolysis show the presence of two devolatilization stages similar to that seen in the LTO stage of HFO combustion. Apart from this, the TG/DTG curves obtained during HFO combustion and pyrolysis differ significantly. Kinetic analysis was also performed using the distributed activation energy model, and the kinetic parameter (E) was determined for the different stages of HFO combustion and pyrolysis processes, yielding a good agreement with the measured TG profiles. FTIR analysis showed the signal of CO2 as approximately 50 times more compared to the other pollutant gases under combustion conditions. Under pyrolytic conditions, the signal intensity of alkane functional groups was the highest followed by alkenes. The TGA-FTIR results provide new insights into the overall HFO combustion processes, which can be used to improve combustor designs and control emissions.Citation
Abdul Jameel AG, Han Y, Brignoli O, Telalovic S, Elbaz AM, et al. (2017) Heavy fuel oil pyrolysis and combustion: kinetics and evolved gases investigated by TGA-FTIR. Journal of Analytical and Applied Pyrolysis. Available: http://dx.doi.org/10.1016/j.jaap.2017.08.008.Sponsors
Research reported in this publication was supported by Saudi Electric Company (SEC) and by competitive research funding from King Abdullah University of Science and Technology (KAUST). The authors acknowledge support from the Clean Combustion Research Center under the Future Fuels research program.Publisher
Elsevier BVAdditional Links
http://www.sciencedirect.com/science/article/pii/S0165237017304734ae974a485f413a2113503eed53cd6c53
10.1016/j.jaap.2017.08.008