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Bioresour Technol. 2016 May;207:276-84. doi: 10.1016/j.biortech.2016.02.031. Epub 2016 Feb 10.

Combustion characteristics and air pollutant formation during oxy-fuel co-combustion of microalgae and lignite.

Author information

1
Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China; Sino-Steel Anshan Thermo-Energy Research Institute, Anshan 114044, People's Republic of China.
2
Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
3
Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China; Chemical Engineering, University of Newcastle, Callaghan, NSW 2308, Australia. Electronic address: jianglong.yu@newcastle.edu.au.

Abstract

Oxy-fuel combustion of solid fuels is seen as one of the key technologies for carbon capture to reduce greenhouse gas emissions. The combustion characteristics of lignite coal, Chlorella vulgaris microalgae, and their blends under O2/N2 and O2/CO2 conditions were studied using a Thermogravimetric Analyzer-Mass Spectroscopy (TG-MS). During co-combustion of blends, three distinct peaks were observed and were attributed to C. vulgaris volatiles combustion, combustion of lignite, and combustion of microalgae char. Activation energy during combustion was calculated using iso-conventional method. Increasing the microalgae content in the blend resulted in an increase in activation energy for the blends combustion. The emissions of S- and N-species during blend fuel combustion were also investigated. The addition of microalgae to lignite during air combustion resulted in lower CO2, CO, and NO2 yields but enhanced NO, COS, and SO2 formation. During oxy-fuel co-combustion, the addition of microalgae to lignite enhanced the formation of gaseous species.

KEYWORDS:

Air pollutants; Kinetics analysis; Lignite; Microalgae; Oxy-fuel combustion

PMID:
26894568
DOI:
10.1016/j.biortech.2016.02.031
[Indexed for MEDLINE]

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