scholarly journals Effect of Ca(OH)2/fly ash weight ratio on the kinetics of the reaction of Ca(OH)2/fly ash sorbents with SO2 at low temperatures

2004 ◽  
Vol 59 (21) ◽  
pp. 4653-4655 ◽  
Author(s):  
Chiung-Fang Liu ◽  
Shin-Min Shih ◽  
Ren-Bin Lin
Keyword(s):  
Fly Ash ◽  
Low Temperatures ◽  
Weight Ratio ◽  
Ash Weight ◽  
Kinetics Of

scholarly journals Kinetics of the reaction of Ca(OH)2/fly ash sorbent with SO2 at low temperatures

2002 ◽  
Vol 57 (1) ◽  
pp. 93-104 ◽  
Author(s):  
Chiung-Fang Liu ◽  
Shin-Min Shih ◽  
Ren-Bin Lin
Keyword(s):  
Fly Ash ◽  
Low Temperatures ◽  
Kinetics Of

scholarly journals SINTESIS DAN KARAKTERISASI FAUJASIT DARI ABU LAYANG : Kajian Pengaruh Waktu Sintesis Terhadap Stabilitas Termal Struktur Faujasit (Kinetics of Faujasite Formation from Fly Ash)

2019 ◽  
Vol 2 (2) ◽  
pp. 10
Author(s):  
Sutarno Sutarno ◽  
Arief Budyantoro
Keyword(s):  
Thermal Stability ◽  
Fly Ash ◽  
Amorphous Phase ◽  
Zeolite Y ◽  
Weight Ratio ◽  
Hydrothermal Time ◽  
X Ray Diffraction ◽  
X Ray ◽  
Kinetics Of ◽  
Thermal Stability Of

Faujasite was hydrothermally synthesized from fly ash at 100oC in alkaline solution by reflux with 5M HCl and fusion with NaOH (weight ratio of NaOH/fly ash = 1.2) pretreatments. Kinetics of faujasite formation was performed by variation of hydrothermal time (0-120 hours). Thermal stability of faujasite from fly ash was tested at 400-900oC and was compared with commercial zeolite Y. The solid products were characterized by X-ray diffraction method. Results showed that faujasite was formed through dissolution of fly ash components such as quartz, mullite and amorphous aluminosilicates (0-3 hours) followed by crystallization to form faujasite (6-48 hours). In longer hydrothermal time (48-72 hours), faujasite transformed into zeolite P and completely formed hydroxysodalite after 120 hours. X-ray diffraction pattern showed that thermal stability of faujasite from fly ash was relatively lower than that of commercial zeolite Y. Faujasite from fly ash transformed into amorphous phase at 800oC whereas commercial zeolite Y transformed into amorphous phase at 900oC.

scholarly journals PHASE TRANSFORMATION IN THE FORMATION OF FAUJASITE FROM FLY ASH

2010 ◽  
Vol 5 (3) ◽  
pp. 278-282 ◽  
Author(s):  
Sutarno Sutarno ◽  
Yateman Arryanto
Keyword(s):  
Phase Transformation ◽  
Fly Ash ◽  
Specific Surface ◽  
Alkaline Solution ◽  
Weight Ratio ◽  
Diffraction Method ◽  
Hydrothermal Time ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ash Weight

Faujasite was hydrothermally synthesized from fly ash at 100oC in alkaline solution by reflux with 5M HCl and fusion with NaOH pretreatments. Phase transformation in the formation of faujasite was performed by variation of NaOH/fly ash weight ratios and hydrothermal times. The solid products were characterized by X-ray diffraction method. Results showed that faujasite was formed through dissolution of fly ash components such as quartz, mullite and amorphous aluminosilicates followed by crystallization to form faujasite. Arranging the NaOH/fly ash weight ratio as well as hydrothermal time can selectively form faujasite. Faujasite with crystallinity of 97.06%, Si/Al ratio of 2.68, and specific surface area of 452.93 m2/g was successfully formed using NaOH/fly ash weight ratio of 1.2 for hydrothermal time of 72 hours. In more concentrated alkaline solution as well as for longer hydrothermal time, faujasite was completely transformed into hydroxysodalite as the final product. Keywords: fly ash, faujasite, and phase transformation.

Geopolymerization kinetics of fly ash based geopolymers using JMAK model

2016 ◽  
Vol 42 (14) ◽  
pp. 15575-15584 ◽  
Author(s):  
Ahmer Ali Siyal ◽  
Khairun Azizi Azizli ◽  
Zakaria Man ◽  
Lukman Ismail ◽  
Muhammad Irfan Khan
Keyword(s):  
Fly Ash ◽  
Kinetics Of

Statistical Modeling, Optimization and Kinetics of Mn2+ Adsorption in Aqueous Solution Using a Biosorbent

2019 ◽  
Vol 233 (8) ◽  
pp. 1201-1214 ◽  
Author(s):  
Elaheh Tajari ◽  
Narges Samadani Langeroodi ◽  
Mahnaz Khalafi
Keyword(s):  
Wheat Bran ◽  
Low Cost ◽  
Weight Ratio ◽  
P Value ◽  
Core Shell ◽  
Optimal Conditions ◽  
Solution Ph ◽  
Shell Weight ◽  
Removal Ratio ◽  
Kinetics Of

Abstract This paper describes the adsorption of Mn2+ ions from water with a mixture of wheat bran and Japanese medlar core shell (weight ratio of 30–70 wheat bran to Japanese medlar core shell) as low-cost adsorbent. Scanning Electron Microscope was used to characterize the adsorbent. The response surface methodology (RSM) that is usually approximated by a second-order regression model was employed to evaluate the effects of solution pH, initial Mn2+ concentration, adsorbent weight and contact time on the removal ratio of the Mn2+ ions. In this regard, the significant variables initial Mn2+ ions concentration, pH, adsorbent weight and square pH were found based on the small P-value for the model coefficients. The predicted optimal conditions were also performed. In the process optimization, maximal value of the removal ratio of Mn2+ was achieved as 96.91%. Additionally, this paper discusses the kinetic of adsorption in optimal conditions.

Deformation kinetics of the Ti-6Al-4V alloy at low temperatures

1975 ◽  
Vol 6 (1) ◽  
pp. 65-75 ◽  
Author(s):  
B. Meester ◽  
M. Döner ◽  
H. Conrad
Keyword(s):  
Low Temperatures ◽  
Deformation Kinetics ◽  
Kinetics Of

Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition

2019 ◽  
Vol 29 (4) ◽  
pp. 868-875 ◽  
Author(s):  
Chun-li LIU ◽  
Shu-hua MA ◽  
Jian DING ◽  
Yang LUO ◽  
Shi-li ZHENG ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Alkaline Condition ◽  
Kinetics Of Decomposition ◽  
Kinetics Of
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