Removal of sulfur at high temperatures using iron-based sorbents supported on fine coal ash

The roles of Fe3+ and SO42− are different at low and high temperatures due to their interaction. It is the appropriate contents of Fe3+ and SO42− that can result in high NH3-SCR activity at varying temperatures.

Download Full-text

97/03783 Extracting useful elements from fine coal ash

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(97)81086-7 ◽

1997 ◽

Vol 38 (5) ◽

pp. 318

Keyword(s):

Coal Ash ◽

Fine Coal

Download Full-text

Experimental investigation of Zhundong high‐calcium coal ash adhesion characteristics on metal surfaces at high temperatures

Asia-Pacific Journal of Chemical Engineering ◽

10.1002/apj.2705 ◽

2021 ◽

Author(s):

Zhongyi Liu ◽

Jing Jin ◽

Liangqian Zheng ◽

Haoran Yang ◽

Xiang He ◽

...

Keyword(s):

Experimental Investigation ◽

High Temperatures ◽

Metal Surfaces ◽

Coal Ash ◽

High Calcium

Download Full-text

Study of the Microstructure of Industrial Residues and its Application in High Performance Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.800.117 ◽

2013 ◽

Vol 800 ◽

pp. 117-122 ◽

Cited By ~ 1

Author(s):

Li Bin Xu ◽

Nai Qian Feng ◽

Kia Hui Tew

Keyword(s):

High Performance ◽

High Performance Concrete ◽

Negative Impact ◽

Rapid Development ◽

Coal Ash ◽

Industrial Wastes ◽

Industrial Residues ◽

Fine Coal ◽

Slag Powder ◽

Phosphorous Slag

Along with the rapid development of China and its eye-catching economic take-off, industrial production has brought about increasingly enormous negative impact. Industrial residues (coal ash, iron-ore slag, phosphorous slag and ganister sand) have accumulated in large quantities, thus severely contaminating the environment and greatly restricting the sustainable economic development. This paper conducts research on microstructure of the industrial wastes that are massively applied in domestic architectural material industry, such as coal ash, (S95S105) slag powder, S75 phosphorous slag, micro-bead (ultra-fine coal ash) and the micro ganister sand so as to analyze its size distribution and particle appearance and introduce its functions and effect in concrete and other cement products.

Download Full-text

Effect of Particle Size and Trench Configuration on Deposition From Fine Coal Flyash Near Film Cooling Holes

Volume 3: Heat Transfer, Parts A and B ◽

10.1115/gt2009-59571 ◽

2009 ◽

Cited By ~ 3

Author(s):

Weiguo Ai ◽

Robert G. Laycock ◽

Devin S. Rappleye ◽

Thomas H. Fletcher ◽

Jeffrey P. Bons

Keyword(s):

Particle Size ◽

Film Cooling ◽

Collection Efficiency ◽

Particle Surface ◽

Coal Ash ◽

Capture Efficiency ◽

Deposition Pattern ◽

Fine Coal ◽

Temperature Maps ◽

Film Cooling Holes

Particulate deposition experiments were performed in a turbine accelerated deposition facility to examine the effects of flyash particle size and trench configuration on deposits near film cooling holes. Deposition on two bare metal Inconel coupons was studied, with hole spacings (s/d) of 3.375 and 4.5. Two sizes of sub-bituminous coal ash particles were used, with mass mean diameter of 4 and 13 microns, respectively. The effect of a cooling trench at the exit of the cooling holes was also examined in this deposition facility. Experiments were performed at different angles of impaction. Particles were accelerated to a combustor exit flow Mach number of 0.25 and heated to 1183°C before impinging on a target coupon. The particle loading in the 1-hr tests was 160 ppmw. Blowing ratios were varied in these experiments from 0 to 4.0. Particle surface temperature maps were measured using two-color pyrometry based on RGB signals from a camera. Deposits generated from finer particles were observed to stick to the surface more tenaciously than larger particles. The capture efficiency measured for the small particles was lower than for the larger particles, especially at low blowing ratios. However, the finer particles exhibited a greater variation in deposition pattern as a function of hole spacing than seen with larger particles. The effect of trench configuration on deposition was examined by performing deposition tests with and without the trench for the same hole spacing and blowing ratio. The effects of trench configuration on capture efficiency, deposition pattern, and surface topography are reported. Deposition experiments at impingement angles from 45° to 15° showed changes in both deposit thickness and temperature. The trench increased cooling effectiveness, but did not change the particulate collection efficiency because the trench acted as a particulate collector.

Download Full-text