Pyrolysis of Laminaria japonica with biochar production and its characteristics Maxim Tsvetkov, Andrey Zaichenko, Dmitry Podlesniy, Maria Repina and Alexander Glukhov E3S Web Conf., 474 (2024) 01012 Published online: 08 January 2024 DOI: 10.1051/e3sconf/202447401012