Numerical study of oxy-fuel combustion behaviors in a 2MWe CFB boiler

Gwak, You Ra; Yun, Jin Han; Keel, Sang In; Lee, See Hoon

doi:10.1007/s11814-020-0611-5

Cited by 24 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9, increasing the biomass cofiring ratio leads to a decrease in CO emissions, indicating improved combustion efficiency. Similar to the atmospheric combustion results [22,23], NOx emissions decrease with biomass cofiring ratio because of the relatively low N2 content in biomass. Additionally, the lower sulfur content of biomass compared to that of coal leads to reduced SO2 emissions.…”

Section: Biomass Cofiringsupporting

confidence: 77%

Experimental Study of Oxy-fuel Combustion and Emission Characteristics using a 10 kWth Pressurized Fluidized Bed Combustor

Kim,

Lee,

Lee

et al. 2024

Preprint

View full text Add to dashboard Cite

Pressurized oxy-fuel combustion (POFC) is a promising carbon capture and storage technology because of its ability for efficient CO2 capture and storage at a relatively low cost. However, the experimental studies conducted on this technology considering pressurized conditions are limited compared with those conducted considering atmospheric conditions. Thus, further investigation on the performance and environmental emissions of oxy-fuel combustion is necessary. In this study, oxy-fuel combustion experiments were conducted using a 10 kWth fluidized bed combustion (FBC) test rig at pressures ranging from 3 to 8 bar(g). The effects of combustion pressure, oxygen concentration, and cofiring with different fuels on combustion temperature, unburned carbon, combustion efficiency, as well as SOx and NOx emissions were examined. The experimental results showed that the CO2 concentration in the flue gas exceeds 90% in all POFC scenarios, thus facilitating the carbon capture process. Additionally, by increasing the combustion pressure, the unburned carbon and CO concentrations in the fly ash are reduced, thereby improving combustion efficiency. Furthermore, the variations in NO, NO2, N2O, and SO2 emissions were measured to assess their environmental impact. Moreover, cofiring tests using biomass under pressurized oxy-fuel conditions (5 bar(g), 30% O2:70% CO2) showed that POFC in a fluidized bed is environmentally friendlier and more efficient for energy production when burning a mixture of coal and biomass than other combustion methods.

show abstract

Section: Biomass Cofiringsupporting

confidence: 77%

Experimental Study of Oxy-fuel Combustion and Emission Characteristics using a 10 kWth Pressurized Fluidized Bed Combustor

Kim,

Lee,

Lee

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…A fluidized bed with smooth mixing of solid particles and good heat transfer characteristics has been utilized in various thermochemical processes so far [13][14][15][16]. A fluidized bed process is being actively studied for integration with solar energy, and solid particles are used as a carrier or storage medium for heat energy [2,17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the solar thermal storage of fluidized bed materials for hybrid solar thermo-chemical processes

Seo

Ahn

et al. 2022

Biomass Conv. Bioref.

Self Cite

View full text Add to dashboard Cite

The use of solid particles as a solar energy transport and storage medium overcomes the intermittency issues for solar energy and is advantageous for the development of a hybrid process that integrates biomass and solar thermal energy. In this study, lab-scale experimental equipment consisted of bubbling fluidized bed (55mm I.D. and 200mm height) with direct irradiated solar thermal storage was designed and constructed. Sand, alumina (Al), and silica carbide (SiC) particles with 3 different particle sizes (130µm, 250µm, and 370µm) were used as a solar thermal storage medium in the fluidized bed. Due to higher absorption and emissivity properties, the solar thermal efficiency of SiC was higher than those of sand and Al. As the gas velocities in the bubbling fluidized bed increased from the initial minimum fluidization velocity (Umf) to 2 Umf, the temperature differences between upper bed and lower bed decreased from 470 o C to 35 o C because of vigorous solid mixing and heat transfer. Also, the increase of average particle size resulted in the decrease of solid heat storage and the increase of gas heat storage due to the differences of specific surface area and gas velocity. Therefore, the energy transported and stored according to the size of silicon carbide was the highest at 370 µm, and the receiver efficiency was 21.38%.

show abstract

Recent Development, Challenges, and Breakthroughs of Thermochemical Conversion Technologies

Ofori-Boateng

2024

Sustainability of Thermochemical Waste Conversion Technologies

View full text Add to dashboard Cite

Numerical study of oxy-fuel combustion behaviors in a 2MWe CFB boiler

Cited by 24 publications

References 26 publications

Experimental Study of Oxy-fuel Combustion and Emission Characteristics using a 10 kWth Pressurized Fluidized Bed Combustor

Experimental Study of Oxy-fuel Combustion and Emission Characteristics using a 10 kWth Pressurized Fluidized Bed Combustor

Evaluation of the solar thermal storage of fluidized bed materials for hybrid solar thermo-chemical processes

Recent Development, Challenges, and Breakthroughs of Thermochemical Conversion Technologies

Contact Info

Product

Resources

About