scholarly journals REMOVAL OF SULFUR DIOXIDE FROM FLUE GAS USING ABSORBENT PREPARED BY WATER AND STEAM HYDRATION

2017 ◽  
Vol 20 (1) ◽  
pp. 49-60
Author(s):  
Lee Keat Teong ◽  
Abdul Rahman Mohamed ◽  
Subhash Bhatia
Keyword(s):  
Fly Ash ◽  
Surface Area ◽  
Flue Gas ◽  
Calcium Sulfate ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization ◽  
Bet Surface Area ◽  
Factor B ◽  
Drying Temperature ◽  
Factor C

Active absorbent for flue gas desulfurization was prepared from coal fly ash, calcium oxide (CaO) and calcium sulfate (CaSO4 ) by hydro-thermal process; steam and water hydration. The absorbents were examined and compared for its micro-structural properties. The experiments were conducted based on Design of Experiments (DOE) according to 24 factorial design. The effect of various absorbent preparation variables such as hydration period (Factor A), ratio of CaO to fly ash (Factor B), amount of calcium sulfate used (Factor C) and drying temperature (Factor D) towards the BET surface area of the absorbent were studied. The BET surface area of the absorbent was in the range of 12.9-169.3 m2/g. Fisher’s test showed that there is a strong influence of factor A, B and D towards the absorbent surface area, while its dependence on factor C is negligible. Comparison between absorbents prepared from water and steam hydration showed that the BET surface area of absorbents prepared from water hydration gives a higher surface area, but at a lower rate. The optimum BET surface area for the prepared absorbent 169.3 m 2 /g, was obtained at the following absorbent preparation variables using water hydration; hydration period of 24 hours, ratio of CaO to fly ash of 1:2, CaSO4 amount of 3 g and drying temperature of 200°C.

Flue gas desulfurization gypsum and coal fly ash as basic components of prefabricated building materials

2013 ◽  
Vol 33 (3) ◽  
pp. 628-633 ◽  
Author(s):  
Antonio Telesca ◽  
Milena Marroccoli ◽  
Daniela Calabrese ◽  
Gian Lorenzo Valenti ◽  
Fabio Montagnaro
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Building Materials ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization ◽  
Prefabricated Building

scholarly journals Selective sulfur removal from semi-dry flue gas desulfurization coal fly ash for concrete and carbon dioxide capture applications

2021 ◽  
Vol 121 ◽  
pp. 117-126
Author(s):  
Raghavendra Ragipani ◽  
Eleanor Escobar ◽  
Dale Prentice ◽  
Steven Bustillos ◽  
Dante Simonetti ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fly Ash ◽  
Flue Gas ◽  
Carbon Dioxide Capture ◽  
Coal Fly Ash ◽  
Sulfur Removal ◽  
Flue Gas Desulfurization

scholarly journals Dissolution kinetics of South African coal fly ash and the development of a semi-empirical model to predict dissolution

2015 ◽  
Vol 21 (2) ◽  
pp. 319-330 ◽  
Author(s):  
Lawrence Koech ◽  
Ray Everson ◽  
Hein Neomagus ◽  
Hilary Rutto
Keyword(s):  
Fly Ash ◽  
Surface Area ◽  
Power Plants ◽  
Coal Fly Ash ◽  
Dissolution Kinetics ◽  
Product Layer ◽  
Bet Surface Area ◽  
X Ray ◽  
Shrinking Core ◽  
Coal Power Plants

Wet flue gas desulphurization (FGD) is a crucial technology which can be used to abate the emission of sulphur dioxide in coal power plants. The dissolution of coal fly ash in adipic acid is investigated by varying acid concentration (0.05-0.15M), particle size (45- 150?m), pH (5.5-7.0), temperature (318-363K) and solid to liquid ratio (5-15 wt %.) over a period of 60 minutes which is a crucial step in wet (FGD). Characterization of the sorbent was done using X-ray fluorescence (XRF), X-ray diffraction (XRD), Furrier transform infrared (FTIR), scanning electron microscope (SEM) and Branauer-Emmett-Teller (BET) surface area. BET surface area results showed an increase in the specific surface area and SEM observation indicated a porous structure was formed after dissolution. The experimental data was analyzed using the shrinking core model and the diffusion through the product layer was found to be the rate limiting step. The activation energy for the process was calculated to be 10.64kJ/mol.

Study of Flue Gas Desulfurization Absorbent Prepared from Coal Fly Ash:  Effects of the Composition of the Absorbent on the Activity

1996 ◽  
Vol 35 (7) ◽  
pp. 2322-2326 ◽  
Author(s):  
Hiroaki Tsuchiai ◽  
Tomohiro Ishizuka ◽  
Hideki Nakamura ◽  
Tsutomu Ueno ◽  
Hideshi Hattori
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization

Preparation of Active Absorbent for Dry-Type Flue Gas Desulfurization from Calcium Oxide, Coal Fly Ash, and Gypsum

2000 ◽  
Vol 39 (5) ◽  
pp. 1390-1396 ◽  
Author(s):  
Tomohiro Ishizuka ◽  
Hiroaki Tsuchiai ◽  
Takeshi Murayama ◽  
Tsunehiro Tanaka ◽  
Hideshi Hattori
Keyword(s):  
Fly Ash ◽  
Calcium Oxide ◽  
Flue Gas ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization

Analysis on Leaching Characteristics of Iron in Coal Fly Ash under Ammonia-Based Wet Flue Gas Desulfurization (WFGD) Conditions

2009 ◽  
Vol 23 (12) ◽  
pp. 5916-5919 ◽  
Author(s):  
Xiang Gao ◽  
Hong-lei Ding ◽  
Zu-liang Wu ◽  
Zhen Du ◽  
Zhong-yang Luo ◽  
...  
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization ◽  
Leaching Characteristics

Immobilization of Heavy Metals by Solidification/Stabilization of Co-Disposed Flue Gas Desulfurization Brine and Coal Fly Ash

2016 ◽  
Vol 30 (6) ◽  
pp. 5042-5051 ◽  
Author(s):  
Jay E. Renew ◽  
Ching-Hua Huang ◽  
Susan E. Burns ◽  
Maya Carrasquillo ◽  
Weiling Sun ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Flue Gas ◽  
Coal Fly Ash ◽  
Flue Gas Desulfurization
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