International Journal for Innovation Education and Research www.ijier.net Vol:-9 No-01, 2021 International Educative Research Foundation and Publisher © 2021 pg. 289 Torrefaction as a Pre-Treatment of Biomass: A Bibliometric Analysis José Airton de Mattos Carneiro-Junior (Corresponding author) Biofuels Department, Federal Institute of Education, Science and Technology of Bahia, Irecê, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0002-9599-7469 Email: airtonifba@gmail.com Eduardo Oliveira Teles Informatic Department, Federal Institute of Education, Science and Technology of Bahia, 42.800- 605, Camaçari, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0003-4926-1423 Email: eoteles@gmail.com Fabio Matos Fernandes SMOS, Bahia State University, Salvador, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0001-8679-120X Email: fmatosf@gmail.com Carine Tondo Alves Department of Energy Engineering, Federal University of the Reconcavo of Bahia, Feira de Santana, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0001-8740-7011 Email: carine.alves@ufrb.edu.br Silvio Alexandre Beisl Vieira de Melo Chemical Engineering Department, and Interdisciplinary Center on Energy and Environment, Federal University of Bahia, Salvador, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0002-8617-3724 Email: sabvm@ufba.br Ednildo Andrade Torres Mechanical Engineering Department, and Interdisciplinary Center on Energy and Environment, Federal University of Bahia, Salvador, State of Bahia, Brazil. ORCID: https://orcid.org/0000-0002-0574-5306 Email: ednildotorres@gmail.com