Reduced graphene oxide as an excellent platform to produce a stable Bronsted acid catalyst for biodiesel production

FUEL

卷:256

Article

dos Santos, Thiago C.¹  Santos, Evelyn C. S.^1,2  Dias, Julianna P.¹  Barreto, Jade²  Stavale, Fernando L.²  Ronconi, Celia M.¹ 

[1] Univ Fed Fluminense, Dept Quim Inorgan, Campus Valonguinho,Outeiro Sao Joao Batista S-N, BR-24020150 Niteroi, RJ, Brazil

[2] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, Brazil

关键词: Biodiesel production;    Heterogeneous catalyst;    Sulfonic reduced graphene oxide;    Acid catalysis;   

DOI  :  10.1016/j.fuel.2019.115793

来源: Elsevier

【 摘 要 】

An efficient and recyclable heterogeneous acid catalyst based on sulfonic-reduced graphene oxide (rGO-SO3H) has been developed and tested for transesterification reaction of soybean oil to produce biodiesel. By combining various techniques we show a high amount of sulfonic groups (12.1 +/- 0.71 mmol g(-1)) were chemically bounded onto the surface of reduced graphene oxide sheets. The catalyst rGO-SO3H shows high biodiesel production (99% yield) and was used in five consecutive reactions without losing its activity. The excellent performance and recyclability of the catalyst can be related to the high content of sulfonic groups bounded to rGO, to the unique bi-dimensional structure of the catalyst, which facilitates mass transfer and to the formation of C-SO3H bonds in rGO which are stable enough to avoid leaching of the active sites up to the fifth cycle of reaction. Therefore, we demonstrate that the material rGO-SO3H is an efficient and promising heterogeneous catalyst for acid-catalyzed transesterification reactions.

【 授权许可】

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