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One-step process to produce furfural from sugarcane bagasse over niobium-based solid acid catalysts in a water medium
Fuel Processing Technology ( IF 7.5 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.fuproc.2020.106482
Mariana N. Catrinck , Paula S. Barbosa , Helder R.O. Filho , Robson S. Monteiro , Márcio H.P. Barbosa , Rogério M. Ribas , Reinaldo F. Teófilo

Abstract This study investigated the production of furfural from sugarcane bagasse over niobic acid (Nb2O2·nH2O, called as NbO) or niobium phosphate (NbOPO4·nH2O, called as NbP) in a one-step process performed in water. The variables temperature (T), the mass of catalyst (mcat), reaction time (rt), and vibration time (Vt) for mixing SCB and catalyst were studied through a design of experiments. After 5 h at 150 °C, the furfural yields were 52.1 g kg−1 for NbO and 59.3 g kg−1 for NbP, while the yields of xylose and arabinose were, respectively, 69.7 g kg−1 and 6.4 g kg−1 for NbO and 147.4 g kg−1 and 11.1 g kg−1 when using NbP. It was proved that furfural yield is independent of the SCB genotype. The selective depolymerization and hydrolysis of hemicellulose into monomers and its further dehydration to furfural were observed. The cellulose and lignin remained readily utilizable for further processing. The better catalytic performance of NbP was attributed to the higher ratio of Bronsted to Lewis acid sites on its surface than NbO.

中文翻译:

水介质中铌基固体酸催化剂从甘蔗渣生产糠醛的一步法

摘要 本研究调查了用铌酸(Nb2O2·nH2O,称为NbO)或磷酸铌(NbOPO4·nH2O,称为NbP)在水中一步法生产甘蔗渣糠醛。通过实验设计研究了用于混合 SCB 和催化剂的变量温度 (T)、催化剂质量 (mcat)、反应时间 (rt) 和振动时间 (Vt)。在 150 °C 下 5 小时后,NbO 的糠醛产量为 52.1 g kg-1,NbP 的糠醛产量为 59.3 g kg-1,而木糖和阿拉伯糖的产量分别为 69.7 g kg-1 和 6.4 g kg-1使用 NbP 时,NbO 和 147.4 g kg-1 和 11.1 g kg-1。已证明糠醛产量与SCB基因型无关。观察到半纤维素选择性解聚和水解成单体并进一步脱水成糠醛。纤维素和木质素仍然易于用于进一步加工。NbP 更好的催化性能归因于其表面上布朗斯台德与路易斯酸位点的比率高于 NbO。
更新日期:2020-10-01
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