Effect of coal fly ash treatments on synthesis of high-quality zeolite A as a potential additive for warm mix asphalt

2022 ◽  
Vol 275 ◽  
pp. 125197
Author(s):  
Bruno C. Amoni ◽  
Armando D.L. Freitas ◽  
Raquel A. Bessa ◽  
Cristiane P. Oliveira ◽  
Moisés Bastos-Neto ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Warm Mix Asphalt ◽  
Zeolite A ◽  
High Quality

Characteristics of MSWI Ash and its Application to Zeolite Synthesis

2014 ◽  
Vol 804 ◽  
pp. 93-96 ◽  
Author(s):  
Yeong Seok Yoo ◽  
Jun Ho Jo
Keyword(s):  
Fly Ash ◽  
Soil Amendment ◽  
Bottom Ash ◽  
Unburned Carbon ◽  
Zeolite Synthesis ◽  
Zeolite A ◽  
High Quality ◽  
Mass Consumption ◽  
Waste Characteristics ◽  
Korean Food

In this study, composition for bottom ash and fly ash of MSWI was analyzed and zeolite was synthesized in order to expand its recycling on high quality and mass consumption. Analysis of ash its characteristics was performed by XRF, XRD, SEM, EDX, TG/DTA. Bottom/fly ash was fired for elimination of unburned carbon at 750°C/12 hr, crushed and synthesized to zeolite in 1, 2, 3, 4, 5 M NaOH solutions under 105°C/24hr by hydrothermal method. Calcite and calcium-silicate compound was mainly contained in bottom ash and CaCl2∙4H2O, Ca (OH)2, NaCl, and calcite and KCl in fly ash. Especially amount of Cl was much contained in fly ash due to Korean food waste characteristics. Bottom ash could synthesize Zeolites in form of sodalite under 3~4 M NaOH and fly ash could synthesize Zeolite A under 1~2 M NaOH. In addition, zeolite synthesized with bottom ash had higher specific surface area and zeolite from fly ash had higher CEC value. Accordingly, ash from MSWI could be recycled for further valuable uses such as non-point pollutant control and/or soil amendment.

scholarly journals In situ ultrasonic monitoring of zeolite A crystallization from coal fly ash

2012 ◽  
Vol 190 (1) ◽  
pp. 38-46 ◽  
Author(s):  
Nicholas M. Musyoka ◽  
Leslie F. Petrik ◽  
Eric Hums ◽  
Hasan Baser ◽  
Wilhelm Schwieger
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Zeolite A ◽  
Ultrasonic Monitoring

Synthesis of high quality zeolites from coal fly ash: Mobility of hazardous elements and environmental applications

2018 ◽  
Vol 202 ◽  
pp. 390-400 ◽  
Author(s):  
Wei Feng ◽  
Zhijian Wan ◽  
Jacqueline Daniels ◽  
Zhikao Li ◽  
Gongkui Xiao ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Environmental Applications ◽  
High Quality ◽  
Hazardous Elements

Adsorption of Chromium in Aqueous Solution by Using Zeolite A Prepared from Fly Ash

2018 ◽  
Vol 792 ◽  
pp. 140-144
Author(s):  
Jumaeri ◽  
Eko Sri Kunarti
Keyword(s):  
Aqueous Solution ◽  
Fly Ash ◽  
Contact Time ◽  
Direct Contact ◽  
Adsorption Process ◽  
Coal Fly Ash ◽  
Hydrothermal Process ◽  
Zeolite A ◽  
Adsorption Ability ◽  
Ph Conditions

Adsorption of Cr(III) and Cr(VI) in aqueous solution by the zeolite A from coal fly ash at various conditions has been carried out. Zeolite A was synthesized from fly ash through modified alkaline fusion hydrothermal process in a reactor stainless steel. Adsorption is carried out by direct contact between the adsorbent and adsorbate in an adsorption batch. Zeolite A from fly ash (ZA-FA) of 0.01 g was mixed with 20 mL both Cr(III) and Cr(VI) at various pH, contact time and initial concentration, in a flask Erlenmeyer 50 mL. The result showed that pH conditions of adsorption process, affect the adsorption ability of zeolite A to Cr(III) and Cr(VI) in aqueous solution. The adsorption of Cr(III) and Cr(VI) on zeolite A reached a maximum at pH 6 and time contact 120 minutes. The adsorption of Cr(III) on zeolite A increased from 3.4 mg/g at pH 3 and achieved a maximum adsorption of 42.67 mg/g at pH 6. At higher pH (7-8) the Cr(III) adsorption tends decreases. The adsorption ability of ZA-FA to Cr(III) is higher than that of Cr(VI) in aqueous solution. The Cr(III) adsorption process on ZA-FA follows the pseudo-order 2 kinetics model.

scholarly journals Synthesis of zeolite A from coal fly ash using ultrasonic treatment – A replacement for fusion step

2016 ◽  
Vol 31 ◽  
pp. 342-349 ◽  
Author(s):  
Tunde V. Ojumu ◽  
Pieter W. Du Plessis ◽  
Leslie F. Petrik
Keyword(s):  
Fly Ash ◽  
Ultrasonic Treatment ◽  
Coal Fly Ash ◽  
Zeolite A

Synthesis of Zeolite A from Mongolian Coal Fly Ash by Hydrothermal Treatment

2018 ◽  
Vol 271 ◽  
pp. 1-8 ◽  
Author(s):  
Ulambayar Rentsenorov ◽  
Batmunkh Davaabal ◽  
Jadambaa Temuujin
Keyword(s):  
Fly Ash ◽  
Hydrothermal Treatment ◽  
Cation Exchange Capacity ◽  
Coal Fly Ash ◽  
Batch Composition ◽  
Exchange Capacity ◽  
Zeolite Synthesis ◽  
Zeolite A ◽  
Acid Pretreatment ◽  
Type Zeolite

Raw coal fly ash and acid pretreated fly ash were used to synthesize A-type zeolite by hydrothermal treatment. In order to synthesize zeolite A an aqueous gel having a molar batch composition of Na2O:Al2O3:1.926SiO2:128H2O was utilized. Fly ash and zeolitic products were characterized by SEM, XRF, XRD and cation exchange capacity (CEC). After hydrothermal treatment, several types of zeolites were formed: zeolite A, analcime, faujasite and hydroxy-sodalite. The highest content of zeolite A was formed in the mixture treated at 80°C for 8 hours. CEC values of the zeolitic products were 28-38 times higher than that of in raw fly ash. Acid pretreatment which leads to low calcium and iron content is preferable method for processing of fly ash for the zeolite synthesis. Synthesized zeolite can be used for ion exchangers for water treatment.

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