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Research Papers

Ultrasonic Vibration-Assisted Pelleting of Cellulosic Biomass for Biofuel Manufacturing

[+] Author and Article Information
P. F. Zhang, W. L. Cong, M. Zhang, Timothy Deines

Department of Industrial and Manufacturing Systems Engineering, Kansas State University, 2037 Durland Hall, Manhattan, KS 66506

Z. J. Pei1

Department of Industrial and Manufacturing Systems Engineering, Kansas State University, 2037 Durland Hall, Manhattan, KS 66506zpei@ksu.edu

D. H. Wang, X. R. Wu

Department of Biological and Agricultural Engineering, Kansas State University, 150 Seaton Hall, Manhattan, KS 66506

1

Corresponding author.

J. Manuf. Sci. Eng 133(1), 011012 (Feb 16, 2011) (7 pages) doi:10.1115/1.4003475 History: Received January 25, 2010; Revised January 06, 2011; Published February 16, 2011; Online February 16, 2011

Increasing demands and concerns for the reliable supply of liquid transportation fuels makes it important to find alternative sources to petroleum based fuels. One such alternative is cellulosic biofuels. However, several technical barriers have hindered large-scale, cost-effective manufacturing of cellulosic biofuels, such as the low density of cellulosic feedstocks (causing high transportation and storage costs) and the lack of efficient pretreatment procedures for cellulosic biomass. This paper reports experimental investigations on ultrasonic vibration-assisted (UV-A) pelleting of cellulosic feedstocks. It studies effects of input variables (ultrasonic vibration, moisture content, and particle size) on output variables (pellet density, stability, durability, pelleting force, and yield of biofuel conversion) in UV-A pelleting. Results showed that UV-A pelleting could increase the density of cellulosic feedstocks and the yield of biofuel conversion.

Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Major processes for manufacturing of cellulosic biofuels

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Figure 2

Purpose of pretreatment in biofuel manufacturing

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Figure 3

Major steps of UV-A pelleting experiments

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Figure 4

Illustration of UV-A pelleting process

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Figure 5

A sieve used in the cutting mill to control the particle size of the biomass powder

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Figure 6

Illustration of the stop position of the tool

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Figure 7

Illustration of pelleting force measurement

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Figure 8

Effects of ultrasonic vibration on switchgrass pellet density

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Figure 9

Effects of MC on switchgrass pellet density

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Figure 10

Effects of particle size on pellet density

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Figure 11

Effects of mixed particle sizes on pellet density

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Figure 12

Effects of ultrasonic vibration on pellet stability

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Figure 13

Effects of MC on pellet stability

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Figure 14

Effects of particle size on pellet stability

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Figure 15

Effects of mixed particle sizes on pellet stability

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Figure 16

Effects of ultrasonic vibration on durability

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Figure 17

Effects of moisture content on durability

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Figure 18

Effects of ultrasonic vibration on pelleting force

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Figure 19

Effects of UV-A pelleting on sugar yield

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