Off-campus South Dakota State University users: To download campus access theses, please use the following link to log into our proxy server with your South Dakota State University ID and password.

Non-South Dakota State University users: Please talk to your librarian about requesting this thesis through interlibrary loan.

Document Type

Thesis - University Access Only

Award Date

2013

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Advisor

Stephan Gent

Abstract

The structural and the rheological properties of corn stover biomass are analyzed applying material testing techniques. Developing testing methods to determine the hardness, reduced elastic modulus, and multiple axis fiber strength is one of the challenges of this study. Hardness and reduced elastic modulus parameters of corn stalk fibers are determined through a nanoindentation machine, NANOVEA®. Tensile strength and flexure tests are performed using a universal testing machine, MTS Insight®. Rheological properties (internal friction coefficient, angle of internal friction, and cohesion) of chopped corn stover biomass in bulk are analyzed using a custom direct shear cell and compared to the limited findings in literature. The measured properties of the biomass have the potential to be used in computer simulations for bulk solid flow analysis. The bulk fluid motion of the pulverized/chopped biomass can be simulated in storage and transportation equipment, including auguring screws and pneumatic conveyance systems, as well as devices for feeding biomass feedstocks in biorefineries. Traditional biochemical and thermochemical reactors operate as batch systems because of the difficulty of feeding the biomass feedstock in a continuous manner. Having a clearer background about the structural and rheological properties of biomass feedstock will help simulate and design the bulk-solid flows within storage bins and conveyance systems.

Library of Congress Subject Headings

Corn stover
Plant biomass
Energy crops

Description

Includes bibliographical references (pages 80-87)

Format

application/pdf

Number of Pages

101

Publisher

South Dakota State University

Rights

In Copyright - Educational Use Permitted
http://rightsstatements.org/vocab/InC-EDU/1.0/

Share

COinS