N migration and transformation during the co-combustion of sewage sludge and coal slime

Wang, Yanlin; Li, Jia; Guo, Baihe; Wang, Biru; Zhang, Liu; Zheng, Xin; Xiang, Jun; Jin, Yan

doi:10.1016/j.wasman.2022.04.036

Cited by 17 publications

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strength of this reduction reaction directly affects the release of NO during the combustion process. The main nitrogen precursor in TPW is N-A, which research indicates generates a significant amount of reducing NH 3 during the volatile release stage [ 36 ]. In addition to the abundant AAEMs in TPW, which catalyze the reduction of NH 3 to NO, significantly reducing the conversion of fuel nitrogen to NO, this is the main reason for the decreased NO conversion rate after TPW blending.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Combustion and NO/SO2 Emission Characteristics during the Co-Combustion Process of Torrefied Biomass and Lignite

Yang,

Zhu,

et al. 2024

Molecules

View full text Add to dashboard Cite

This paper investigates the combustion characteristics and pollutant emission patterns of the mixed combustion of lignite (L) and torrefied pine wood (TPW) under different blending ratios. Isothermal combustion experiments were conducted in a fixed bed reaction system at 800 °C, and pollutant emission concentrations were measured using a flue gas analyzer. Using scanning electron microscopy (SEM) and BET (nitrogen adsorption) experiments, it was found that torrefied pine wood (TPW) has a larger specific surface area and a more developed pore structure, which can facilitate more complete combustion of the sample. The results of the non-isothermal thermogravimetric analysis show that with the TPW blending ratio increase, the entire combustion process advances, and the ignition temperature, maximum peak temperature, and burnout temperature all show a decreasing trend. The kinetic equations of the combustion reaction process of mixed gas were calculated by Flynn–Wall–Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS) kinetic equations. The results show that the blending of TPW reduces the activation energy of the combustion reaction of the mixed fuel. When the TPW blending ratio is 80%, the activation energy values of the mixed fuel are the lowest at 111.32 kJ/mol and 104.87 kJ/mol. The abundant alkali metal ions and porous structure in TPW reduce the conversion rates of N and S elements in the fuel to NO and SO2, thus reducing the pollutant emissions from the mixed fuel.

show abstract

Section: Resultsmentioning

confidence: 99%