Batch Pyrolysis and Co-Pyrolysis of Beet Pulp and Wheat Straw

• Published in: Materials 2022-02, Vol.15 (3), p.1230
• Main Authors: Chojnacki, Jerzy, Kielar, Jan, Kukiełka, Leon, Najser, Tomáš, Pachuta, Aleksandra, Berner, Bogusława, Zdanowicz, Agnieszka, Frantík, Jaroslav, Najser, Jan, Peer, Václav
• Format: Article
• Language: English
• Subjects: Agricultural production; Biomass energy; Carbon dioxide; Catalytic cracking; Chemical composition; Defecation; Fluidized bed reactors; Fourier transforms; Gases; Generators; Granulation; Laboratories; Methane; Pyrolysis; Raw materials; Spectrum analysis; Substrates; Sugar; Synergistic effect; Synthesis gas; Wheat
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15031230

Granulated beet pulp and wheat straw, first separately and then mixed in a weight ratio of 50/50%, underwent a pyrolysis process in a laboratory batch generator with process temperatures of 400 and 500 °C. The feedstock's chemical composition and the pyrolysis products' chemical composition (biochar and pyrolysis gas) were analysed. A synergistic effect was observed in the co-pyrolysis of the combined feedstock, which occurred as an increase the content of the arising gas in relation to the total weight of the products. and as a reduction of bio-oil content. The maximum gas proportion was 21.8% at 500 °C and the minimum between 12.6% and 18.4% for the pyrolysis of individual substrates at 400 °C. The proportions of the gases, including CO, CO , CH , H , and O , present in the resulting synthesis gases were also analysed. The usage of a higher pyrolysis final temperature strongly affected the increase of the CH and H concentration and the decrease of CO and CO concentration in the pyrolysis gas. The highest percentage of hydrogen in the synthesis gas, around 33% , occurred at 500 °C during co-pyrolysis.