APPLICATION OF A PSEUDO-KINETIC GENERALIZED SEVERITY MODEL TO THE CONCENTRATED SULFURIC ACID HYDROLYSIS OF PINEWOOD AND ASPENWOOD

作者：Janga Kando K; Oyaas Karin; Hertzberg Terje; Moe Storker T^*

来源：BioResources, 2012, 7(3): 2728-2741.

• Concentrated sulfuric acid
• Decrystallization
• Generalized severity parameter
• Severity parameter
• Lignocellulose
• Lignocellulosics
• Aspen
• Trembling aspen
• Populus tremula
• Pine
• Scots pine
• Pinus sylvestris
• Hydrolysis
• Biofuels
• Biorefinery

The yield of monosaccharides after two-stage concentrated sulfuric acid hydrolysis of softwood (Scots pine) and hardwood (trembling aspen) was modeled using a generalized severity parameter with a time-independent rate constant. The severity parameter, which combines the major operating variables acid concentration, temperature, and reaction time in the decrystallization stage into a single reaction ordinate, was successfully used to describe monosaccharide yields after a standardized hydrolysis stage. Conversion of cellulose to glucose demanded a higher severity to reach maximum glucose yields than the conversion of hemicelluloses to their respective monosaccharides, and the conversion of pine demanded a higher severity to obtain maximum monosaccharide yields as compared to aspen. The results indicate that the generalized severity parameter can be a useful tool for the prediction of sugar yields in a two-stage concentrated sulfuric acid hydrolysis process.

• 出版日期2012