Pyrolysis of wheat and barley straw

Abstract

Pyrolysing agricultural crop residues and other biomass constitutes a newer method of transforming often difficult, waste materials into a novel type of soil amendment/additive. Simultaneously, this process also makes it possible to exploit part of the energy released in the agricultural production. Biochar, viewed as the solid product of biomass pyrolysis, is a remarkable, porous material, rich in carbon. Two agricultural crop residues, such as wheat and barley straw, were selected for the experimental studies. The results indicate that the practical temperature for the production of biochar from the two explored materials occurs in the vicinity of 600 °C. Starting at this temperature, the biochar produced complies safely with the principal European Biochar Certificate standards (EBC 2012). Thus, for the wheat straw and barley straw – originated char, the content of the carbon amounts to 67.2 and 67.0 mass %, the atomic ratio H : C is as large as 0.032 and 0.026, and the specific surface area amounts to 217 and 201 m<sup>2</sup>·g<sup>–1</sup>, respectively.

Influence of temperature and duration of pyrolysis process on calorific value of cereal straw biochar and dust explosive index

“…In contrast, Park et al (2014) studied the slow pyrolysis of rice straw and reported that an increase in the temperature of the process from 300 to 700°C resulted in a decrease in the calorific value of the material from 16.6 to 13.6 MJ kg -1 (Park et al, 2014). On the other hand, in a study conducted by Sedmihradská et al (2020), biochar from barley straw prepared at 500°C was characterized by a calorific value at the level of 25.5 MJ kg -1 (Sedmihradská et al, 2020).…”

Adsorption of the non-steroidal anti-inflammatory drug (ibuprofen) onto biochar and magnetic biochar prepared from chrysanthemum waste of the beverage industry

“…Moreover, the European Biochar Certificate standard (EBC) states that the biochar should have the surface area larger than 150 m 2 g −1 . 65 Therefore, chrysanthemum waste from the beverage industrial is a suitable feedstock for biochar production.…”

Environmental and Economic Spatial Analysis System for Biochar Production – Case Studies in the East of England and the East Midlands

“…The maximum operating temperature of the application equipment (400 • C) is assumed as the pyrolysis temperature for the system. Based on Sedmihradská's experimental research [47], this pyrolysis process produces a biochar yield of 32.9%, bio-oil yield of 49.9%, and syngas yield of 15.6%. The calorific value of bio-oil and syngas is calculated by the thermochemical characteristics [47].…”