CO2 gasification of char from spent mushroom substrate in TG-MS system

• Published in: Journal of thermal analysis and calorimetry Vol. 140; no. 5; pp. 2337 - 2345
• Main Authors: Slezak, Radoslaw, Krzystek, Liliana, Ledakowicz, Stanislaw
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.06.2020; Springer Nature B.V
• Subjects: Analytical Chemistry; Carbon dioxide; Carbonation; Chemistry; Chemistry and Materials Science; Cultivation; Gas composition; Gasification; Inorganic Chemistry; Measurement Science and Instrumentation; Mushrooms; Physical Chemistry; Polymer Sciences; Reaction kinetics; Shrinking core model; Substrates; Spent mushroom substrate; Kinetics; CO; gasification; Char; Waste to energy
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-019-09024-8

Gasification of the char obtained from the spent substrate after mushroom cultivation was carried out in a thermobalance connected to a mass spectrometer in the temperature range from 200 to 950 °C and CO 2 concentration from 5 to 100 vol%. Under non-isothermal conditions, in addition to the char gasification process, both carbonation and calcination reactions occurred. The investigation of gasification kinetics in CO 2 was carried out under isothermal conditions. The rate of gasification reaction was determined from the shrinking core model, and kinetic constant has been calculated from Langmuir–Hinshelwood kinetics. On the basis of the conducted research, it was observed that the saturation of active sites on the char particles occurred above 50 vol% CO 2 , regardless of temperature. The analysis of gas composition indicates CO as the main product of gasification.