Combustion of Salicornia bigelovii Pyrolysis Bio-oil and Surrogate Mixtures: Experimental and Kinetic Study
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ArticleAuthors
Gautam, Ribhu
Nagaraja, Shashank S.

Alturkistani, Sultan H.

Zhai, Yitong

Shao, Can

Albaqshi, Mohammed
Fiene, Gabriele
Tester, Mark A.

Sarathy, Mani

KAUST Department
Clean Combustion Research CenterPhysical Science and Engineering (PSE) Division
Chemical Engineering Program
Mechanical Engineering Program
Biological and Environmental Science and Engineering (BESE) Division
Plant Science
Center for Desert Agriculture
Date
2022-12-09Embargo End Date
2023-12-09Permanent link to this record
http://hdl.handle.net/10754/686355
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Show full item recordAbstract
Pyrolysis bio-oil (PBO), a renewable and sustainable alternative energy source, is gaining significant importance. PBOs are polar, viscous, and acidic in nature, which restrict their direct utilization. The blending of PBOs with fossil-based fuels in combustion processes can potentially reduce net carbon emissions. The utilization of PBOs in combustion systems warrants an understanding of their combustion chemistry, which serves as the motivation for this study. In this study, pyrolysis of a saltwater halophyte, Salicornia bigelovii, was performed to obtain PBO. Based on the PBO composition, a blend of pyrrole, furfural, and toluene was prepared as a surrogate. The combustion chemistry of a three-component surrogate comprising oxygen- and nitrogen-containing compounds is studied for the first time. To understand the gas-phase combustion chemistry of the PBO surrogate, experiments were performed in a jet-stirred reactor (JSR) at atmospheric pressure and a residence time of 2 s in the temperature range of 780–960 K (ϕ = 0.25). Also, the PBO surrogate was blended in the ratios of 10 and 20% (by wt) with a toluene/iso-octane (80/20 mol/mol) mixture and investigated to mimic the combustion of PBO with hydrocarbons. A detailed chemical kinetic mechanism was compiled using different sub-mechanisms for surrogate components. NUIGMech1.2 was used as the base mechanism. Fuel-reactant species and 17 product species were identified to understand the combustion chemistry of PBO surrogate and its blends. Furthermore, rate of production analysis was performed to understand the pathways vital for forming intermediates. In addition, the thermal stability of PBO was studied in a thermogravimetric analyzer in the temperature range of 105–750 °C in oxygen and nitrogen atmospheres. The mass loss and derivative mass loss profiles were acquired, different stages of the reactions were identified under the oxygen atmosphere, and the apparent kinetic parameters were determined via the Friedman method.Citation
Gautam, R., Nagaraja, S. S., Alturkistani, S., Zhai, Y., Shao, C., Albaqshi, M., Fiene, G. M., Tester, M., & Sarathy, S. M. (2022). Combustion of Salicornia bigelovii Pyrolysis Bio-oil and Surrogate Mixtures: Experimental and Kinetic Study. Energy & Fuels. https://doi.org/10.1021/acs.energyfuels.2c02769Sponsors
The authors acknowledge the financial support from Clean Combustion Research Center (CCRC), KAUST. The authors also acknowledge the experimental facilities at CCRC and Core Labs at KAUST.Publisher
American Chemical Society (ACS)Journal
Energy & FuelsAdditional Links
https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.2c02769ae974a485f413a2113503eed53cd6c53
10.1021/acs.energyfuels.2c02769