Affiliation:
1. Pro2TecS–Product Technology and Chemical Processes Research Centre, Department of Chemical Engineering, Physical Chemistry and Materials Science, University of Huelva, Huelva, Spain
2. Pro2TecS–Product Technology and Chemical Processes Research Centre, Department of Chemistry ‘Prof. José Carlos Vílchez Martín’, University of Huelva, Huelva, Spain
Abstract
To evaluate the potential of compost based on municipal solid waste (MSW) and 20% legume pruning under a pyrolysis process, generated products, including solids (biochar), liquids (bio-oil), and gases (non-condensable gases), through experimentation in a pilot plant with a fluidized bed reactor at 450°C and gas chromatography/mass spectrometry have been analysed. In addition, the compost kinetic behaviour by thermogravimetric analysis (TGA), using the Flynn–Wall–Ozawa (FWO) method, has been investigated. Four different reaction zones, associated with lignocellulosic materials (hemicellulose, cellulose, and lignin) with a first step for water evaporation, in TGA curve have been observed. A biochar with low stability and aromaticity, considering high and low O/C and H/C ratios, respectively, has been obtained. The obtained pyrolytic liquids contain a high concentration of phenolic compounds because of a significant presence of lignins and other high molecular weight compounds in the original material. Moreover, the generated non-condensable gases consist mainly of short-chain compounds, such as alcohols, aldehydes, and alkenes produced from hemicellulose, cellulose, and proteins.
Funder
the Regional Ministry of Innovation, Science and Enterprise, Government of the Junta de Andalucía
University of Huelva / CBUA
research and knowledge transfer micro-projects “Cátedra de la Provincia”, University of Huelva, Spain
State Research Agency
Subject
Pollution,Environmental Engineering