Production of Fermentable Sugars and Hydrogen-Rich Gas from Agave tequilana Biomass
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The Mexican tequila industry annually processes approximately 1 × 106 Agave tequilana plants, generating approximately 1.78 × 108 kg of bagasse per year. This biomass is considered an attractive alternative to fossil fuels as an energy source and to produce biofuels and/or chemical products because it is produced and used without adversely affecting the environment. The first aim of the present work was to determine the effect of temperature, the concentration of H2SO4, and reaction time on the hydrolysis of agave bagasse to maximize the fermentable sugars using a steam explosion. This step process generated 71.11 g/L of reducible sugars in the supernatant (59.29 % glucose, 29.05 % xylose, and 11.66 % fructose) and unconverted organic matter of enzymatic hydrolysis bagasse (35.4 % α-cellulose, 7.33 % hemicellulose, 49.91 % lignin, and 7.31 % ashes). A mathematical surface response analysis of the hydrolysis was used for process optimization. The second aim involves the study of the thermodynamics of the reforming of unconverted organic matter from enzymatic hydrolysis of Agave tequilana bagasse (ATB) evaluated by the Gibbs free energy minimization method for hydrogen production. The effect of the parameters on the system performance measures, such as reaction temperature (T), Water/Biomass ratio (WBR), and pressure (P), were also investigated. The maximum H2 production obtained was 23.2 mol of H2/271.5 g ATB with a WBR ≥ 11 and a temperature of 740 °C. These findings indicate that the temperature and WBR are essential factors in the production of H2, which was reflected in the efficiency of the process.
KeywordsLignocellulose residue Acid hydrolysis Agave tequilana Hydrogen Thermodynamic analysis
This work was supported by the Mexican Council of Science and Technology (CONACYT) through the Bioenergy Thematic Network (“Red Temática de Bioenergía”).
- 2.SENER (2013) Estrategia Nacional de Energía 2013–2027. http://www.energia.gob.mx/res/PE_y_DT/pub/2013/ENE_2013-2027.pdf
- 4.Saucedo-Luna J, Castro-Montoya AJ, Martinez-Pacheco MM, Sosa-Aguirre CR, Campos-Garcia J (2011) Efficient chemical and enzymatic saccharification of the lignocellulosic residue from Agave tequilana bagasse to produce ethanol by Pichia Caribbica. J Ind Microbiol Biotechnol 38(6):725–732CrossRefPubMedGoogle Scholar
- 5.Saucedo-Luna J, Castro-Montoya A, Rico J, Campos-García J (2010) Optimización de hidrólisis ácida de bagaso de Agave tequilana Weber. Revista mexicana de ingeniería química 9(1):91–97Google Scholar
- 7.Crabtree RH (2010) Energy production and storage: inorganic chemical strategies for a warming world. John Wiley & Sons, USAGoogle Scholar
- 8.Pérez-Jiménez J-A (2008) Estudio del pretratamiento con agua caliente en fase líquida de la paja de trigo para su conversión biológica a etanol, Doctoral thesis, Universidad de Jaen, SpainGoogle Scholar
- 13.Negro MJ, Alvarez C, Ballesteros I, Romero I, Ballesteros M, Castro E, Manzanares P, Moya M, Oliva JM (2014) Ethanol production from glucose and xylose obtained from steam exploded water-extracted olive tree pruning using phosphoric acid as catalyst. Bioresour Technol 153:101–107. doi: 10.1016/j.biortech.2013.11.079 CrossRefPubMedGoogle Scholar