Fabrication of Nano Zeolite P from Coal Fly Ash by Combining Alkaline — Fusion and Hydrothermal Reactions

2013 ◽  
Vol 591 ◽  
pp. 126-129 ◽  
Author(s):  
Yong Zai Wang ◽  
Le Wang ◽  
Hong Ming Xu ◽  
Shao Hui Luo
Keyword(s):  
Fly Ash ◽  
Single Phase ◽  
Hydrothermal Reaction ◽  
Coal Fly Ash ◽  
Reaction Products ◽  
Hydrothermal Temperature ◽  
Hydrothermal Reactions ◽  
Alkaline Fusion ◽  
Crystallite Sizes ◽  
Zeolite P

Well-crystallised nanozeolite P has been synthesized from coal fly ash by combined method of alkaline-fusion and hydrothermal reactions. The influence of preparation parameters, such as the proportion of fly ash/NaOH, the hydrothermal reaction temperature and time on the reaction products were investigated by XRD and FESEM. Results indicated that, the optimum conditions for fabrication of a single phase of zeolite P were the mass ratio of fly ash/ NaOH =1/1, fusion temperature at 550°C and hydrothermal temperature at 100°C for 48h .The average crystallite sizes of the zeolite samples are 29.4nm. The obtained products show crystal morphology heterogeneity comprised by various euhedral forms.

Microwave-Assisted Two-Step Process for the Synthesis of a Single-Phase Na-A Zeolite from Coal Fly Ash

2008 ◽  
Vol 19 (1) ◽  
pp. 83-94 ◽  
Author(s):  
Hidekazu Tanaka ◽  
Atsushi Fujii ◽  
Satoshi Fujimoto ◽  
Yoshiki Tanaka
Keyword(s):  
Fly Ash ◽  
Single Phase ◽  
Coal Fly Ash ◽  
Step Process ◽  
Microwave Assisted

scholarly journals Synthesis of zeolite-P from coal fly ash derivative and its utilisation in mine-water remediation

2010 ◽  
Vol 106 (5/6) ◽  
Author(s):  
Leslie F. Petrik ◽  
Viswanath R.K. Vadapalli ◽  
Wilson M. Gitari ◽  
Annabelle Ellendt ◽  
Gillian Balfour
Keyword(s):  
Fly Ash ◽  
Mine Water ◽  
Coal Fly Ash ◽  
Water Remediation ◽  
Zeolite P

Zeolite synthesis from coal fly ash by hydrothermal reaction using various alkali sources

2002 ◽  
Vol 77 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Norihiro Murayama ◽  
Hideki Yamamoto ◽  
Junji Shibata
Keyword(s):  
Fly Ash ◽  
Hydrothermal Reaction ◽  
Coal Fly Ash ◽  
Zeolite Synthesis

scholarly journals Synthesis and Electrochemical Performance of LiMnPO4by Hydrothermal Method

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Daichi Fujimoto ◽  
Yu Lei ◽  
Zheng-Hong Huang ◽  
Feiyu Kang ◽  
Junichi Kawamura
Keyword(s):  
Hydrothermal Method ◽  
Single Phase ◽  
Hydrothermal Reaction ◽  
Specific Capacity ◽  
Manganese Acetate ◽  
Acetate Tetrahydrate ◽  
Reaction Parameters ◽  
Promising Candidate ◽  
Hydrothermal Temperature ◽  
P Sources

LiMnPO4with olivinestructure which is the promising candidate for high voltage cathode material was synthesized by hydrothermal method. In order to synthesize high purity and well-defined LiMnPO4, several precursors for Li, Mn, and P sources and hydrothermal reaction parameters including temperature and [H2O]/[Mn] value are optimized. By analyzing the structure, Mn valence, morphology, and chemical ratio via XRD, XPS, Raman, SEM, and ICP LiMnPO4synthesized from manganese acetate tetrahydrate have single phase of LiMnPO4without impurity and showed charge and discharge reaction caused by Mn2+/Mn3+redox. Specific capacity of synthesized LiMnPO4grew up during cycling. Moreover, when hydrothermal temperature was set at 150°C and [H2O]/[Mn] value was set at 15, discharge capacity as high as 70 mAh/g was obtained at1/20  Crate.

Preparation of Xonotlite Nano-Fibres Using the Silica Source from Coal Fly Ash and Ca(OH)2

2014 ◽  
Vol 633 ◽  
pp. 7-10 ◽  
Author(s):  
Jing Yang ◽  
Xin Zhang ◽  
Hong Wen Ma ◽  
Ming Wei Wang ◽  
Han Wu
Keyword(s):  
Fly Ash ◽  
Calcium Silicate ◽  
Coal Fly Ash ◽  
High Alumina ◽  
Thermal Synthesis ◽  
Hydrated Calcium Silicate ◽  
Hydrothermal Temperature ◽  
Silica Source ◽  
Naoh Solution ◽  
Hydrated Calcium

Extracting aluminum oxide from high-alumina coal fly ash are significant to make up for the inadequacy of bauxite resource in China. How to comprehensively utilize silica components in coal fly ash is a key technical question in industrialization for extracting of alumina from coal fly ash. Desilication of coal fly ash (CFA) and preparation of xonotlite were studied using the silica-rich solution from the CFA as silica source and calcium oxide as calcium source respectively. The CFA is from a power plant at Shizuishan city in Ningxia, China. Xonotlite was successfully prepared by a series processes including predesilication, hydro-thermal synthesis. The experimental results indicated that SiO2in the coal fly ash changed into NaSiO3after the coal fly ash was treated by desilication using NaOH solution. Hydrated calcium silicate was obtained from the reaction of the solutions produced by desilication and Ca (OH)2at the condition of Ca/Si (mol)=1, T=160°Cand t=1h. Xonotlite was synthesized by the hydrated calcium silicate using the hydrothermal temperature of 260°C for 2 hours. Keywords: Coal Fly Ash, Pre-desilication, alkali Hydrothermally-treated, Xonotlite nanofibres

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