estuscience - se

Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering

2667-4211

Eskisehir Technical University

10.18038/estubtda.647910

Engineering

Mühendislik

INVESTIGATION OF THERMAL AND STRUCTURAL PROPERTIES OF NITRIC, HYDROCHLORIC AND SULPHURIC ACID-TREATED ZEOLITE

https://orcid.org/0000-0003-2535-5003

Akbelen

Meryem

FEN FAKÜLTESİ Ezber

Çağatay

FEN BİLİMLERİ ENSTİTÜSÜ

12 16 2019

20 114 119 11 18 2019 12 10 2019

2000

Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering

In this study, in order toconsider the effect of the hydrochloric acid (HCl), nitric acid (HNO3)and sulphuric acid (H2SO4) treatments onthermal and structural properties, zeolite was modified with 1 Macid solutions at 70 oC during 4 h using batch method. Thestructural and thermal properties of zeolites were studied by X-ray diffraction(XRD), X-ray fluorescence (XRF), thermogravimetric analysis (TG), differentialthermogravimetric analysis (DTG) and differential thermal analysis (DTA). QuantitativeXRD analysis show that the natural zeolite mainly consists of mordenite andclinoptilolite with varying amounts of quartz, feldspar and clay mineral. TG-DTGand DTA curves of all zeolite samples were obtained in the temperature rangebetween 30 and 1000 oC. Based on the TG results, thetotal mass losses for all acid-treated samples (8.51-8.44 %) are less than thatof the natural (Z) sample (10.14 %). SiO2/Al2O3 ratio of the natural zeolite sample (Z) increasedfrom 5.6 to 9.8, 9.7 and 8.8 in the Z-N, Z-H and Z-S samples, respectively,indicating the removal of the significant amount of aluminum from the zeolitestructure.

Natural zeolite Clinoptilolite Mordenite XRD XRF TGA-DTG-DTA

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