Pyrolysis of Pruning Residues from Various Types of Orchards and Pretreatment for Energetic Use of Biochar

The routine pruning and cutting of fruit trees provides a considerable amount of biowaste each year. This lignocellulosic biomass, mainly in the form of branches, trunks, rootstocks, and leaves, is a potential high-quality fuel, yet often is treated as waste. The results of a feasibility study on bi...

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Bibliographic Details
Published in:Materials 2021-05, Vol.14 (11), p.2969
Main Authors: Kazimierski, Paweł, Hercel, Paulina, Suchocki, Tomasz, Smoliński, Jakub, Pladzyk, Agnieszka, Kardaś, Dariusz, Łuczak, Justyna, Januszewicz, Katarzyna
Format: Article
Language:English
Subjects:
Alternative energy
Biomass
Biomass energy
Calorific value
Carbon
Carbon content
Experiments
Feasibility studies
Fixed bed reactors
Fluidized bed reactors
Fruits
Laboratories
Lignocellulose
Materials selection
Moisture content
Orchards
Pruning
Pyrolysis
Residues
Sulfur
Thermogravimetric analysis
Trees
Wineries & vineyards
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Summary:The routine pruning and cutting of fruit trees provides a considerable amount of biowaste each year. This lignocellulosic biomass, mainly in the form of branches, trunks, rootstocks, and leaves, is a potential high-quality fuel, yet often is treated as waste. The results of a feasibility study on biochar production by pyrolysis of residues from orchard pruning were presented. Three types of biomass waste were selected as raw materials and were obtained from the most common fruit trees in Poland: apple (AP), pear (PR), and plum (PL) tree prunings. Two heating rates and three final pyrolysis temperatures were applied. For the slow (SP) and fast pyrolysis (FP) processes, the heating rates were 15 °C/min and 100 °C/min, respectively. The samples were heated from 25 °C up to 400, 500, and 600 °C. Chemical analyses of the raw materials were conducted, and the pyrolysis product yields were determined. A significant rise of higher heating value (HHV) was observed for the solid pyrolysis products, from approximately 23.45 MJ/kg for raw materials up to approximately 29.52 MJ/kg for pyrolysis products at 400 °C, and 30.53 MJ/kg for pyrolysis products at 600 °C. Higher carbon content was observed for materials obtained by fast pyrolysis conducted at higher temperatures.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14112969