Thermal and gas (CH4 and C2H4) adsorption characteristics of nitric acid-treated clinoptilolite

• Published in: Journal of thermal analysis and calorimetry 2019-03, Vol.135 (6), p.2917-2924
• Main Author: Erdogan Alver, Burcu
• Format: Article
• Language: English
• Subjects: Acids; Adsorption; Analysis; Analytical Chemistry; Chemistry; Chemistry and Materials Science; Differential thermal analysis; Differential thermogravimetric analysis; Ethylene; Fluorescence; Health; Heat treatment; Inorganic Chemistry; Measurement Science and Instrumentation; Methane; Nitric acid; Physical Chemistry; Polymer Sciences; Powders (Particulate matter); Thermal properties; Thermodynamic properties; Thermogravimetric analysis; X ray fluorescence analysis; X ray powder diffraction; X-ray diffraction; X-ray spectroscopy
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-018-7503-5

In this study, in order to consider the effect of the time of the nitric acid treatment on thermal, structural and gas adsorption properties, clinoptilolite was modified with 1.0 M acid solutions at 80 °C for 2, 4, 6, 12 and 24 h. Structural and thermal properties of natural and acid-treated clinoptilolites were investigated by powder X-ray diffraction, X-ray fluorescence, thermogravimetric analysis, differential thermal analysis and nitrogen adsorption methods. Methane (CH 4 ) and ethylene (C 2 H 4 ) are hazardous gases for human and plant health, respectively. Therefore, some measures should be taken to reduce emissions of methane and ethylene. CH 4 and C 2 H 4 adsorption capacities of clinoptilolite (CLN) from Turkey and that of acid-treated forms at 273 K up to 100 kPa were found between 0.556–0.683 and 0.470–1.295 mmol g −1 , respectively.