Effect of SO2 and SO3 on the distribution of Na/S/Cl and ashes characteristics of Zhundong coal during circulating fluidized bed O2/CO2 combustion

Li, Wei; Liu, Dianbin; Kong, Runjuan

doi:10.1016/j.joei.2021.03.016

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…In addition, the introduction of SO 2 and SO 3 made the surface structure of the deposits more porous, but the BET surface area of fly ash declined. No obvious differences in particle size distribution of the deposits were observed …”

Section: Ash Formation and Deposition In Oxy-fbcmentioning

confidence: 92%

“…However, a recent work on the effects of atmosphere and chlorine on potassium release in air and oxy-fuel combustion of biomass in a fluidized bed showed that the release of potassium was much lower in an oxyfuel environment (30% O 2 /70% CO 2 ) than in an air atmosphere at 850 °C, even though the concentration of Cl was ∼2 times greater. It was attributed to the changes of Cl-containing species formed in a CO 2 -rich atmosphere. , Both SO 2 and SO 3 could also suppress element release as chlorides, by forming sulfates …”

Section: Transformation Of Mineral Mattermentioning

confidence: 99%

“…In oxyfuel combustion, elevating the inlet oxygen concentration could promote the sulfation reaction and significantly reduce the content of chlorine in the deposits . In a recent work, both SO 2 and SO 3 were found to result in the sulfation of NaCl. Consequently, more sodium was retained in the bottom and circulating ashes, while the contents of sodium and chlorine in the deposits were reduced.…”

Section: Ash Formation and Deposition In Oxy-fbcmentioning

confidence: 99%

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A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

et al. 2021

Energy Fuels

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To alleviate the global warming issue, various CO 2 abatement technologies have been proposed. As one of the leading options for CO 2 capture in power plants mostly firing coal and biomass, the oxyfuel combustion technology has been actively developed for decades. Progress at different stages of the development has been continuously updated in several reviews. However, they usually cover a wide range of topics, which vary significantly in detail. The ash issues are very critical to the design and operation of oxyfuel boilers, but may be one of the most controversial topics. The knowledge is widely scattered in different research articles, and a relatively comprehensive description is not available in the published reviews. Therefore, it is difficult for one to have a clearer picture of this important topic. The present review attempts to provide a more complete understanding. It pays particular attention to experimental data, because they are the basis for model development and full-scale simulation. Different from previous reviews that presented limited information on mineral matter transformation under oxyfuel conditions, this Review summarizes most of the related results reported in the open literature. Data on ash formation and deposition in oxyfuel combustion are also updated. They are organized according to different combustion technologies, i.e., oxyfuel pulverized fuel combustion (oxy-PFC) and oxyfuel fluidized bed combustion (oxy-FBC). By correlating between the three aspects, an in-depth understanding of ash issues in oxyfuel combustion may be achieved. At the end of this Review, key messages regarding mineral matter transformation, ash formation and deposition in oxyfuel combustion, and future research needs are presented.

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Section: Ash Formation and Deposition In Oxy-fbcmentioning

confidence: 92%