title: Study of "napier grass" delignification for production of cellulosic derivatives.
abstract: Recently, much research on the evaluation of new cellulose sources has been developed. In this context, a promising source is "napier grass", which contains 30.40% lignin, 36.34% cellulose, and 34.12% hemicellulose. In this work, conditions for the delignification of "napier grass" in the laboratory were studied by using calcium oxide (CaO) and hydrogen peroxide (H(2)O(2)). The best pulping conditions were 9.00% CaO for a period of 2.73 h, which resulted in 74.99% delignification and 66.58% cellulose. The best conditions for the bleaching process were pH 12 and hydrogen peroxide at concentration of 4.2% for 6h, at a temperature of 40 °C, which gave 90.98% delignification and 99.21% cellulose. The analyses were performed by using weight percent.
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil. andreia.morandim@gmail.com
authors.forename: Andreia
authors.initials: A
authors.lastname: de Araújo Morandim-Giannetti
authors.forename: Tiago Santos
authors.initials: TS
authors.lastname: Albuquerque
authors.forename: Renata Kobal Campos
authors.initials: RK
authors.lastname: de Carvalho
authors.forename: Ramires Menezes Silva
authors.initials: RM
authors.lastname: Araújo
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Magnabosco
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry; D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D031782:Pennisetum / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*; D013696:Temperature
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D011134:Polysaccharides; D000431:Ethanol; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D006861:Hydrogen Peroxide; C016538:lime