Title

Rheology of Dilute Acid Hydrolyzed Corn Stover at High Solids Concentration.

Authors

Ehrhardt, M. R.; Monz, T. O.; Root, T. W.; Connelly, R. K.; Scott, C. T.; Klingenberg, D. J.

Abstract

The rheological properties of acid hydrolyzed corn stover at high solids concentration (20-35 wt.%) were investigated using torque rheometry. These materials are yield stress fluids whose rheological properties can be well represented by the Bingham model. Yield stresses increase with increasing solids concentration and decrease with increasing hydrolysis reaction temperature, acid concentration, and rheometer temperature. Plastic viscosities increase with increasing solids concentration and tend to decrease with increasing reaction temperature and acid concentration. The solids concentration dependence of the yield stress is consistent with that reported for other fibrous systems. The changes in yield stress with reaction conditions are consistent with observed changes in particle size. This study illustrates that torque rheometry can be used effectively to measure rheological properties of concentrated biomass.

Subjects

RHEOLOGY; HYDROLYSIS; CORN stover; RHEOMETERS; BIOMASS; TEMPERATURE

Publication

Applied Biochemistry & Biotechnology, 2010, Vol 160, Issue 4, p1102

ISSN

0273-2289

Publication type

Academic Journal

DOI

10.1007/s12010-009-8606-z