unburned carbon
Recently Published Documents


TOTAL DOCUMENTS

348
(FIVE YEARS 63)

H-INDEX

33
(FIVE YEARS 5)

2022 ◽  
Vol 423 ◽  
pp. 127198
Author(s):  
Xinze Geng ◽  
Xiaoshuo Liu ◽  
Xunlei Ding ◽  
Qiang Zhou ◽  
Tianfang Huang ◽  
...  

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122170
Author(s):  
Anna M. Kisiela-Czajka ◽  
Sylwia Hull ◽  
Andrzej Albiniak

2022 ◽  
pp. 403-449
Author(s):  
Sugandha Singh ◽  
Manas K. Ghorai ◽  
Kamal K. Kar
Keyword(s):  
Fly Ash ◽  

2021 ◽  
Vol 49 (12) ◽  
pp. 1936-1942
Author(s):  
Chuan-lin SONG ◽  
Ke REN ◽  
Shen-wei LONG ◽  
Ying-quan ZHU ◽  
Zhao-cai TENG ◽  
...  

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7391
Author(s):  
Dae-Gyun Lee ◽  
Min-Jong Ku ◽  
Kyeong-Ho Kim ◽  
Jae-Sung Kim ◽  
Seung-Mo Kim ◽  
...  

Although replacing biomass, (e.g., wood chips and pellets), with thinning wood and herbaceous biomass is eco-friendly and economically advantageous, their direct utilization in plant boilers is associated with ash-related challenges, including slagging and fouling. The aim of this study is to determine the effects of ash removal treatment (ashless biomass (ALB)) in the context of solid fuel power plant boilers. Ash was removed via neutralization of metal ions and carboxylic acids contained in the biomass ash. The ash removal rate of K, Na, Cl was indicated by assessing the total biomass before and after ash removal treatment, via XRF analysis. Co-combustion with sub-bituminous coal and ALB-treated biomass was analyzed using a drop tube furnace and revealed that NOx and SOx values converged converge toward an approximate 10 ppm error, whereas the Unburned Carbon (UBC) data did not exhibit a specific trend. Factors associated with slagging and fouling, (capture efficiency (CE), and energy based growth rate (GRE)) were calculated. All biomass samples without pretreatment exhibited V-shaped variation. Conversely, for ashless biomass (ALB) samples, CE and GRE gradually decreased. Thus, the ALB technique may minimize slagging and fouling in a boiler, thus, reducing internal corrosion associated with ash deposition and enhancing the economic operation of boilers.


Author(s):  
Da Shi ◽  
Jianbo Zhang ◽  
Xinjuan Hou ◽  
Shaopeng Li ◽  
Huiquan Li ◽  
...  

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6517
Author(s):  
Hangwei Lin ◽  
Koji Takasu ◽  
Hidehiro Koyamada ◽  
Hiroki Suyama

The unburned carbon in fly ash inhibits the performance of concrete. A device using the flotation method to remove unburned carbon in fly ash was developed, and the operating condition of the device was experimentally examined. According to the results, the device was able to remove unburnt carbon from fly ash by using the installed micro bubble nozzles and a whirl-type pump. The removal efficiency of unburnt carbon improved when prior forced stirring was carried out by a concrete mixer for 3 min, and a scavenger was added into the fly ash slurry at a density of about 60 wt%. It has also been confirmed that the method of circulating water is more effective than the method of not circulating water. The elements of the modified fly ash slurry (MFAS) have also been experimentally confirmed as not being too different from untreated fly ash, except for the fact that the content of unburned carbon is reduced. The compressive strength and drying shrinkage characteristics of concrete made with MFAS were investigated. The use of MFAS will reduce the performance of concrete compared to that of ordinary concrete. This shows that in a certain range (15–30%), the influence of MFAS on drying shrinkage is constant. The static elastic modulus and dynamic elastic modulus were also investigated. The above results show that the application of MFAS prepared by the flotation method to concrete is feasible.


Sign in / Sign up

Export Citation Format

Share Document