0
Research Papers

A Microreactor System for the Analysis of the Fast Pyrolysis of Biomass

[+] Author and Article Information
Alexander Williams

Department of Mechanical Engineering, The George W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332alexwilliams@gatech.edu

J. Rhett Mayor1

Department of Mechanical Engineering, The George W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332rhett.mayor@me.gatech.edu

1

Corresponding author.

J. Thermal Sci. Eng. Appl 2(3), 031010 (Dec 22, 2010) (9 pages) doi:10.1115/1.4003147 History: Received August 20, 2010; Revised November 23, 2010; Published December 22, 2010; Online December 22, 2010

A novel fast pyrolysis microreactor was developed to facilitate control over feedstock dwell time, pyrolysis temperature, and the individual collection of pyrolysis liquid and solid products. The design process followed is presented including design requirements, functional decomposition, commissioning tests, and the final microreactor design. A vibratory assisted spreading study was performed as particle agglomeration was a key challenge within the reactor design. The study results and analysis of variance are presented identifying the most significant factor and a best operating point. Analytical and experimental heat transfer analyses are also presented to validate the reactor’s thermal performance. Through the pairing of the analyses, projections for thin biomass layer heating rates are made resulting in estimates on the order of 400°C/s. Finally, experimental pyrolysis results are given showing fast pyrolysis conversion as a function of time and the process by which kinetic descriptors could be derived using this system’s results. Yield results are compared with literature and are found to be in good agreement with published fast pyrolysis results.

FIGURES IN THIS ARTICLE
<>
Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Fast pyrolysis reactor function tree

Grahic Jump Location
Figure 2

Microreactor chamber section view highlighting particle distribution componentry

Grahic Jump Location
Figure 3

Reactor process flow diagram

Grahic Jump Location
Figure 4

Photograph of complete microreactor system

Grahic Jump Location
Figure 5

(a) Particle spreading with no vibration. (b) Particle spreading with vibratory assistance. (c) Contrast modified image utilized in image processing.

Grahic Jump Location
Figure 6

Wafer heating rate test stand assembly diagram

Grahic Jump Location
Figure 7

Infrared image of the wafer during a 400°C heating rate test with the analysis region shown by the black border

Grahic Jump Location
Figure 8

Wafer surface temperature experimental and theoretical results: (a) 225°C temperature plot, (b) 225°C heating rate plot, (c) 400°C temperature plot, and (d) 400°C heating rate plot

Grahic Jump Location
Figure 9

Predicted (a) surface temperatures and (b) heating rates in wafers of different thicknesses for 400°C plate temperature

Grahic Jump Location
Figure 10

(a) Collected bio-oil and (b) residual solid products from the pyrolysis of Pinus Taeda

Grahic Jump Location
Figure 11

Single component half-life model fit to pyrolysis conversion results for Pinus Taeda at 400°C

Grahic Jump Location
Figure 12

Avicel cellulose and Beechwood xylan 350°C preliminary results and best fit half-life curves

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In