Title: A comparison of thermal decomposition of vineyard pruning waste in the flow of air and nitrogen

Authors: Peter Rantuch; Juraj Ondruška; Igor Wachter

Addresses: Institute of Safety, Environment and Quality, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology , Paulínska 16, Trnava, Bratislava, Slovakia ' Institute of Manufacturing Systems, Environmental Technology and Quality Management, Faculty of Mechanical Engineering, Slovak University of Technology, Slobody 17, 81231 Bratislava, Slovakia ' Institute of Safety, Environment and Quality, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology, Paulínska 16, Trnava, Bratislava, Slovakia

Abstract: The article deals with a thermal decomposition of vineyard pruning waste. The samples were tested by means of thermogravimetry and differential scanning calorimetry in the flow of air and nitrogen. Thermal gravimetric analyses were performed up to a temperature of 650°C and differential scanning calorimetry up to a temperature of 600°C. The heating rates were 2°C.min⁻¹, 5°C.min⁻¹, 10°C.min⁻¹, 15°C.min⁻¹ and 20°C.min⁻¹ in both cases. Values of activation energies were subsequently calculated from the obtained results using various methods. The maximum mass loss of the samples was observed in the temperature range from 297.5°C to 319.3°C in the case of test with air and in the case of test with nitrogen in the range between 330°C and 367.3°C. The values of activation energy of thermal decomposition in the air were higher than the values in the case of nitrogen atmosphere.

Keywords: thermal oxidation; pyrolysis; thermogravimetry; activation energy; vineyard waste; thermal analysis; combustion; biomass; thermal degradation; differential scanning calorimetry; DSC; heating.

DOI: 10.1504/IJGW.2017.086282

International Journal of Global Warming, 2017 Vol.13 No.2, pp.138 - 156

Received: 29 Jul 2015
Accepted: 30 Sep 2015
Published online: 04 Sep 2017 *

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