The properties of biochars derived from different plant residue and different pyrolysis temperatures

Öz

By determining the degraded and limiting properties of the soil, producing solutions for the improvement of these properties will be able to provide sustainable and efficient use of soil. Especially, low organic matter content of soils causes many problems. Studies on increasing the organic matter content of soils by using various plant residues and organic fertilizers constituted the subject of many researches. However, in recent years, the use of biochar obtained by pyrolysis of various plant materials at high temperatures has become popular. With the use of biochar, both the characteristics of soil are improved, and greenhouse effect is reduced. Furthermore, it provides the production of various biofuels. The attributes of obtained biochar vary with pyrolysis material and temperature. The aim of this study was to produce biochar by pyrolyzing diverse plant residues in different temperature conditions and determine some physical and chemical properties of the biochar. For this purpose, sunflower stalk, sunflower head, corn stalk, corn cob and wheat straw were converted to biochar’s at 300 °C, 400 °C, 500 °C, and 600 °C temperatures. Biochar yield, surface area, C/N ratio, pH and electrical conductivity (EC) values and water holding capacities of the experimental samples were determined. In the light of results, the highest surface area was found in sunflower stalk at 300 °C, while the lowest surface area was detected as in wheat straw at 300 °C. The C/N ratios increased in all the samples except corn stalk and corn cob.

Anahtar Kelimeler

• Biochar,plant residues,pyrolysis

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