The use of catalytic hydrogenation to intercept carbohydrates in a dilute acid hydrolysis of biomass to effect a clean separation from lignin

Autor:	Danny M. Lillard, Chris D. Brasher, Hari D. Mandal, Samuel C. Mills, José S. Villarreal, Justin T. Pon, Kevin D. O'Hara, Bruce O. Horne, Ernesto H. Sanchez, J. Michael Robinson, Annette F. Raigoza, Melissa A. Bently, Caroline E. Burgess, José M. Macias
Rok vydání:	2004
Předmět:	chemistry.chemical_classification Renewable Energy Sustainability and the Environment Biomass Forestry Sorbitan Catalysis chemistry.chemical_compound Hydrolysis chemistry Polyol Lignin Organic chemistry Phenols Energy source Waste Management and Disposal Agronomy and Crop Science
Zdroj:	Biomass and Bioenergy. 26:473-483
ISSN:	0961-9534
Popis:	Biomass carbohydrates are fractionated very cleanly (>99%) from unreacted insoluble lignin by a dilute acid hydrolysis (0.35–1.5% H3PO4), wherein the incipient aldoses are intercepted by catalytic hydrogenation (Ru/C) to produce a solution of C5–C6 polyols (xylitol, sorbitol) and anhydro polyols (sorbitan) in which no phenols could be detected ( ppm ) . A screen removes granular catalyst and lignin is simply filtered from the product slurry. This “intercepted dilute acid hydrolysis” (IDAH) of biomass to polyols affords high conversion for a variety of biomass types within 3– 6 h at ∼185°C. Minimum polyols cost (not including catalyst cost) is calculated to range from $0.055– $0.070 kg −1 . Polyols, rather than aldoses, are required for subsequent chemical conversion into hydrocarbon fuels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f3a5806b31ffbd7964fa3f4e404f9e41 https://doi.org/10.1016/j.biombioe.2003.09.005 Zobrazit plný text záznamu Full Text from ScienceDirect