Hydrolysis of cellulose using heteropoly salts derivatives from H3PW12O40 with different redox properties as catalysts

Materia

Resende, Eliane Cristina de¹  Arantes, Ana Carolina Cunha²  Bianchi, Maria Lucia²  Oliveira, Anna Cláudia Santos de²  Borges, Willian Miguel da Silva² 

[1] Federal Institute of Minas Gerais, Bambuí, Brazil;Federal University of Lavras, Lavras, Brazil

关键词: hydroxymethylfurfural;    redox properties;    tungstophosphoric acid.;   

DOI  :  10.1590/s1517-707620170003.0200

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Heteropoly salts containing different numbers of vanadium atoms (K4[PVW11O40] - KPWV1 and K6[PV3W9O40] - KPWV3) were synthesized from the heteropoly acid H3PW12O40 (HPW), and used as catalysts in hydrolysis of cellulose reactions in order to change the redox properties and verify whether the cluster of catalysts are involved in mechanism reaction. The hydrolysis reactions following a full 23 factorial design with the variables: mass ratio (catalyst/substrate), reaction time and temperature. The variables evaluated were significant at a 90% confidence level including second and third order interactions. According to the conducted experiments, the catalysts were all active in hydrolysis. The best results occurred when HPW was used suggesting that the redox properties did not have much influence in depolymerization of cellulose and the hydrolysis mechanism are assigned to acidic properties of the medium. The main products obtained from the reactions were glucose and HMF, which are products of great interest in the chemical industry.

【 授权许可】

CC BY