Design of Nickel Supported on Water-Tolerant Nb2O5 Catalysts for the Hydrotreating of Lignin Streams Obtained from Lignin-First Biorefining

Autor(es)

Leal, Glauco F. ^{[1, 2, 3]} ; Lima, Sergio ^[2] ; Graca, Ines ^{[1, 2]} ; Carrer, Heloise ^[1] ; Barrett, Dean H. ^[4] ; Teixeira-Neto, Erico ^[5] ; Curvelo, Antonio Aprigio S. ^[3] ; Rodella, Cristiane B. ^[1] ; Rinaldi, Roberto ^[2]

Afiliação do(s) autor(es)

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil

^[2] Imperial Coll London, Dept Chem Engn, South Kensington Campus, London SW7 2AZ - England

^[3] Univ Sao Paulo, Inst Chem Sao Carlos, Dept Phys Chem, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Paulo - Brazil

^[4] Univ Witwatersrand, Sch Chem, Johannesburg - South Africa

^[5] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ISCIENCE; v. 15, p. 467+, MAY 31 2019.
• Citações Web of Science: 2

Resumo

In biomass conversion, Nb2O5 has attracted increasing attention as a catalyst support presenting water-tolerant Lewis acid sites. Herein, we address the design of Ni/Nb2O5 catalysts for hydrotreating of lignin to hydrocarbons. To optimize the balance between acidic and hydrogenating properties, the catalysts were first evaluated in the hydrotreating of diphenyl ether. The best catalyst candidate was further explored in the conversion of lignin oil obtained by catalytic upstream biorefining of poplar. As primary products, cycloalkanes were obtained, demonstrating the potential of Ni/Nb2O5 catalysts for the lignin-to-fuels route. However, the Lewis acidity of Nb2O5 also catalyzes coke formation via lignin species condensation. Thereby, an acidity threshold should be found so that dehydration reactions essential to the hydrotreatment are not affected, but the condensation of lignin species prevented. This article provides a critical ``beginning-to-end'' analysis of aspects crucial to the catalyst design to produce lignin biofuels. (AU)

• Processo FAPESP: 16/50423-3 - Biorefino catalítico á montante de bagaço de cana de açúcar para a produção de biocombustíveis e produtos químicos
• Beneficiário: Antonio Aprigio da Silva Curvelo
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional