Critical analysis of zeolite 4A synthesis through one-pot fusion hydrothermal treatment approach for class F fly ash

Date

2021-10-01

Author

Akın, Süleyman Şener
Kirdeciler, Salih Kaan
Kazanç Özerinç, Feyza
Akata Kurç, Burcu

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

624
views

0
downloads

In this study, ‘‘One-pot fusion assisted hydrothermal synthesis’’ approach was employed to understand the nucleation and crystallization behaviour of the fusion product of Class F fly ash for zeolite 4A synthesis. Two sets of experiments were conducted by tailoring the control parameter of H2O/Na2O molar ratio (L/S) to investigate the nucleation and crystallization behaviour of zeolite 4A. The molar ratios of SiO2/Al2O3 and Na2O/SiO2 were tuned before alkali fusion by adding different amounts of Al(OH)3 to the fly ash along with the alkali agent, Na2CO3. Under the conditions of 12h aging at 47 °C and 7h crystallization at 90 °C, the sample with high L/S ratio (3.1 Na2O: 2.2 SiO2: 1.0 Al2O3: 79.2 H2O) yielded pure phase of Zeolite 4A with 94% relative crystallinity, while the sample with low L/S ratio (3.1 Na2O: 2.2 SiO2: 1.0 Al2O3: 42.2 H2O) resulted in the highest sodalite impurity. In general, the alkalinity level was observed to be the most dominant factor among all synthesis parameters. Nevertheless, low L/S ratio led to rapid crystallization in just 2.5h at 75 °C. Because of the dependency on the alkalinity level, the dissolution of low-carnegieite (LC) was determined as the decisive factor in the formation of zeolite 4A from the fusion product. The total time of hydrothermal treatment and aging temperature were the other main factors. The crystal growth of zeolite 4A was more sensitive to changes induced by crystallization time and temperature at high L/S ratio. Relative crystallinity of zeolite 4A varied in an expanded range in terms of crystallization time (36%–86%) and temperature (25%–73%) at high L/S ratio.

Subject Keywords

Alkalinity, Zeolite 4A, Fly ash, Fusion, One-pot

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85112135993&origin=inward
https://hdl.handle.net/11511/91931

Journal

Microporous and Mesoporous Materials

DOI

https://doi.org/10.1016/j.micromeso.2021.111338

Collections

Test and Measurement Center In advanced Technologies (MERKEZ LABORATUVARI), Article

Suggestions

OpenMETU
Core

Investigation of fly ash characteristics on zeolite 4A synthesis Akın, Süleyman Şener; Kazanç Özerinç, Feyza; Department of Micro and Nanotechnology (2019) There is lack of information about the relation between the candidate raw material fly ash and end product, Zeolite 4A.This study aims to fill the gap in the literature through controlled ash production experiments, characterization studies and Zeolite 4A synthesis. As a result of studies, the nucleation behaviour of the alkali fusion product obtained from fly ash was demonstrated and the most crystalline Zeolite 4A with cubic morphology were obtained from Seyitömer fly ash with alkali fusion product of Si/...
Synthesis of CuO nanostructures on zeolite-Y and investigation of their CO2 adsorption properties Boruban, Cansu; Nalbant Esentürk, Emren (2017-10-01) Copper(II) oxide (CuO) nanoparticles (NPs) in two different morphologies, spiky and spherical, were synthesized on zeolite-Y by a modified impregnation method, and their CO2 adsorbing capabilities were investigated under standard conditions (1 atm and 298 K). The properties and CO2 adsorption performances of the hybrid systems were characterized by transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray, X-ray diffraction, X-ray photoelectron spectroscopy, atomic absorption s...
Applications of ions produced by low intensity repetitive laser pulses for implantation into semiconductor materials Wolowski, J.; Badziak, J.; Czarnecka, A.; Parys, P.; Pisarek, M.; Rosinski, M.; Turan, Raşit; Yerci, Selçuk (2008-01-01) This work reports experiment concerning specific applications of implantation of laser-produced ions for production of semiconductor nanocrystals. The investigation was carried out in the IPPLM within the EC STREP 'SEMINANO' project. A repetitive pulse laser system of parameters: energy up to 0.8 J in a 3.5 ns-pulse, wavelength of 1.06 mu m, repetition rate of up to 10 Hz, has been employed in these investigations. The characterisation of laser-produced ions was performed with the use of 'time-of-flight' io...
Catalytic oxidation of nitrogen containing compounds for nitrogen determination Karakaş, Gürkan (2019-02-15) The high temperature catalytic oxidation (HTCO) performance of Al2O3 supported Pt, Cu, Cu-Ce and Fe catalysts were systematically studied with a perspective of selective oxidation of nitrogenous compounds to nitric oxide for quantitative determination of bound nitrogen. The catalyst samples were prepared via impregnation and characterized by XRD and BET. In addition, temperature programmed reaction experiments with acetonitrile and oxygen were conducted to evaluate the catalytic activity and selectivity tow...
Controlled assemble and microfabrication of zeolite particles on SiO2 substrates for potential biosensor applications Öztürk, Semra; Turan, Raşit; Akata Kurç, Burcu (2008-12-04) Zeolite nanoparticles were organized into functional entities on SiO2 substrates and microfabrication technique was tested to form patterns of zeolite nanoparticles on SiO2 using the electron beam lithography (EBL). The effect of different techniques for efficient zeolite assembly on the SiO2 substrates was investigated. For this purpose, three different assembly techniques were tested. The first two methods are spin-coating (SC) and ultrasound aided strong agitation (US) methods, which were tested using ba...

Citation Formats

S. Ş. Akın, S. K. Kirdeciler, F. Kazanç Özerinç, and B. Akata Kurç, “Critical analysis of zeolite 4A synthesis through one-pot fusion hydrothermal treatment approach for class F fly ash,” Microporous and Mesoporous Materials, vol. 325, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85112135993&origin=inward.