You are using an outdated browser. Please upgrade your browser to improve your experience.
Javascript is disabled in your web browser. For full functionality of this site it is necessary to enable JavaScript.
This website is using cookies.
We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.
x
CPOTE2022 logo
CPOTE2022
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1021-A

Book of abstracts draft
slider slider slider slider slider slider

Oat straw pyrolysis with ammonium chloride doping. A view on surface chars, kinetics and thermodynamics

Wojciech JERZAK, AGH University of Science and Technology, Poland
Marcin GAJEK, AGH University of Science and Technology, Poland
Kazimierz KOWALSKI, AGH University of Science and Technology, Poland
Aneta MAGDZIARZ, AGH University of Science and Technology, Poland

Chlorine is one of the most problematic elements in agriculture biomass. To better understand the behaviour of chlorine in the oat straw pyrolysis process, ammonium chloride was doped. The aim of this work is to determine the effect of inorganic chlorine addition to agricultural biomass on kinetics and thermodynamic parameters of the pyrolysis process. Preliminary experimental investigations included thermogravimetric (TG) and simultaneously mass spectrometry (MS) analysis to study kinetic parameters. The thermal analysis of raw oat straw and oat straw with doped ammonium chloride was carried out for four heating rates (5, 10, 20 and 30 K/min). On the basis of TGA data, the influence of ammonium chloride doping to straw and the degree of conversion on changes in activation energy, pre-exponential factor, enthalpy, Gibbs free energy, and entropy were determined. The doping of ammonium chloride to the straw increased the mean value of the activation energy. Additionally, the pyrolysis process of raw oat straw and oat straw with doped ammonium chloride was investigated in a fixed bed reactor under special system with pre-programmed heating curves for 873 K. The collected char was surface analyzed by the X-ray photoelectron spectroscopy (XPS) method to determine the forms of occurrence of elements such as carbon, nitrogen, and chlorine. Only organic forms of chlorine were identified in the char.

Keywords: Pyrolysis, Agriculture biomass, Biochar, Chlorine, Thermal analysis
Acknowledgment: This research was founded in whole by the National Science Centre, Poland [grant no. 2020/39/B/ST8/00883]