Journal
BIORESOURCE TECHNOLOGY
Volume 311, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123527
Keywords
Dyeing sludge; Rice husk; Co-combustion; Gas Emissions; Kinetic
Funding
- National Natural Science Foundation of China [51908433]
- Natural Science Foundation of Hubei province-China [2019CFB236]
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Co-combustion of dyeing sludge (DS) and rice husk (RH) is a promising energy-from-waste method. The aim of this work was to investigate and quantify the effect of RH additive on combustion performance, gas evolution (especially gaseous pollutants) and kinetics during DS combustion by thermogravimetry-mass spectrometry method. Results revealed that the introduction of RH improved the combustibility, burnout performance and combustion stability of DS. Optimal RH addition (10% RH) reduced the emission of gaseous pollutants (NH3, NO2, COS, SO2 and CS2). The interaction between DS and RH inhibited the devolatilization reaction and emission of gaseous sulfur substances, and it also restrained NO2 emission under optimal RH additive amount. A four-interval kinetic model (D-1 -> F-3 -> D-1 -> F-3) was established to describe the co-combustion process (R-2 greater than 0.9999). RH addition, especially at high doses, led to an increase in activation energy relative to DS.
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