Ternary aqueous ionic liquid system for the pretreatment of mixed agave bagasse and municipal solid waste
Tuesday, April 29, 2014: 9:45 AM
Grand Ballroom D-E, lobby level (Hilton Clearwater Beach)
Jose A. Perez-Pimienta1, Ma. Teresa Ponce-Noyola1, Seema Singh2 and Blake A. Simmons3, (1)Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del IPN, Mexico City, Mexico, (2)Deconstruction Division, Joint BioEnergy Institute, Emeryville, CA, (3)Vice-President, Deconstruction Division, Joint BioEnergy Institute, Emeryville, CA
The production of biofuels and chemicals from lignocellulosic feedstocks is an important alternative to conventional petroleum-derived products. One of the major obstacles in lignocellulose conversion is overcoming biomass recalcitrance for enzymatic hydrolysis and downstream fermentation through pretreatment while still maintaining a sustainable and economically viable process. Recently, ionic liquid (IL) pretreatment using 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) have demonstrated the potential of agave bagasse (AGB) as a biofuel feedstock that can produce high saccharification kinetics and sugar yields. The presence of water (up to 50wt%) have shown to improve saccharification yields along with other advantages such as a facilitated recovery of pure IL, lower amounts of IL employed on the process and a less viscous solution formed which leads to a facilitated biomass processing. This study aims to assess the effect of a ternary aqueous system, mixing [C2mim][OAc], 1-butyl-3-methylimidazolium acetate ([C4mim][OAc]) and water at 14 selected ratios, with the only constraint defined as water usage set at 50%. IL pretreatment was conducted for AGB, municipal solid waste (MSW) and a mixture of both feedstocks at 120°C for 3 hrs and 10% biomass loading with subsequent enzymatic saccharification. Pretreated materials were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and wet-chemistry techniques.