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Investigation of the Structure of the Biochar Obtained by Slow Pyrolysis of Elephant Grass during Its Steam Gasification
Author(s) -
Ferreira Suelem Daiane,
Junges Janaína,
Bassanesi Gabriela Reginato,
Lazzarotto Ivan Pedro,
Osório Eduardo,
Godinho Marcelo
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800680
Subject(s) - biochar , pyrolysis , chemistry , syngas , carbon fibers , alkali metal , chemical engineering , biomass (ecology) , pulp and paper industry , waste management , materials science , organic chemistry , catalysis , agronomy , composite material , engineering , composite number , biology
Abstract A detailed evaluation of the structure of biochar from slow pyrolysis of elephant grass during its steam gasification was performed. The effects of surface area and inherent alkali and alkaline earth metal (AAEM) species on the reactivity of the biochar were investigated. Drastic changes in biochar structure occurred throughout the reaction, especially for low degrees of conversion. The BET surface area of the biochar increased significantly until the conversion reached 0.49, and there was a steep decrease at high degrees of conversion. The biochar showed a high AAEM concentration. The aromaticity of the biochar suggested an ordered carbon structure that can lower the reaction rate. The high syngas yield makes the process attractive for generation of renewable energy.