Acid-catalyzed transformation of orange waste into furfural:the effect of pectin degree of esterification  

作　　者：Eva E.Rivera-Cedillo Marco M.González-Chávez Brent E.Handy María F.Quintana-Olivera Janneth López-Mercado María-Guadalupe Cárdenas-Galindo 

机构地区：[1]CIEP Facultad de Ciencias Químicas,Universidad Autónoma de San Luis Potosí,Av.Dr.Manuel Nava No.6,San Luis Potosí,SLP 78210,México [2]Ingeniería en Nanotecnología,Universidad de la Ciénega del Estado de Michoacán de Ocampo,Av.Universidad Sur 3000,Sahuayo de Morelos,Michoacán 59103,México.

出　　处：《Bioresources and Bioprocessing》2024年第1期706-720,共15页生物资源与生物加工(英文)

基　　金：supported by the project:“Obtención de biocombustibles y compuestos químicos de alto valor agregado a partir de biomasas de desecho ricas en pectina”,CONAHCYT agreement:CB 255527-2016;the Fellowship with reference number:654271 from the Mexican Council for Science and Technology,CONAHCYT was assigned to Eva Estela Rivera Cedillo as PhD student.

摘　　要：The transformation of biomasses from agro-industrial waste can significantly impact the production of green chemicals from sustainable resources.Pectin is a biopolymer present in lignocellulosic biomass as Orange Peel Waste(OPW)and has possibilities for making platform compounds such as furfural for sustainable chemistry.In this work,we studied the transformation to furfural of OPW,pectins,and d-galacturonic acid(D-GalA),which is the main component(65 wt%)of pectin.We analyzed pectins with different degrees of esterification(45,60 and 95 DE)in a one-pot hydrolysis reaction system and studied the differences in depolymerization and dehydration of the carbohydrates.The results show that the production of furfural decreases as the DE value increases.Specifically,low DE values favor the formation of furfural since the decarboxylation reaction is favored over deesterification.Interestingly,the furfural concentration is dependent upon the polysaccharide composition of pentoses and uronic acid.The obtained concentrations of furfural(13 and 14 mmol/L),d-xylose(6.2 and 10 mmol/L),and L-arabinose(2.5 and 2.7 mmol/L)remained the same when the galacturonic acid was fed either as a polymer or a monomer under the same reaction conditions(0.01 M SA,90 min and 433 K).OPW is proposed as a feedstock in a biorefinery,in which on a per kg OPW dry basis,90 g of pectin and 15 g of furfural were produced in the most favorable case.We conclude that the co-production of pectin and furfural from OPW is economically feasible.

关 键 词：Pectin hydrolysis DECARBOXYLATION DEHYDRATION Degree of esterification FURFURAL 

分 类 号：O65[理学—分析化学]