Biochar Characterization in Complex Soil Mixtures
- High Resolution Nitrogen Pore Distribution Analysis (HRPDA)
Larry Murrell1,Yun-feng Chang2, and Greg Thiele3
1.
Independent Consultant, 2.
Sigma Innova LLC, 3.
Micromeritics Analytical Services
Paper...
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Biochar Characterization in Complex Soil Mixtures
- High Resolution Nitrogen Pore Distribution Analysis (HRPDA)
Larry Murrell1,Yun-feng Chang2, and Greg Thiele3
1.
Independent Consultant, 2.
Sigma Innova LLC, 3.
Micromeritics Analytical Services
Paper No:
2
Σ I
Introduction
• Experimental technique used for catalysts and sorbents
• Results for ‘state-of-art’ Cabot carbon black
• Results for Cabot carbon black mixed with soil
• Results for commercial charcoal subjected to
freeze-thaw cycles
• Future application potential for biochar samples
3
Σ I
Analytical Technique
• Volumetric dosing N2 adsorption at liquid nitrogen
temperature gives accurate ‘map’, or ‘blue print’, of both
size and amount of voids in materials < 3000 Å
diameter
• When combined with Hg porosimetry detailed structure
of porous materials produced from 500 micrometer
diameter to about 5 Å or 0.
5 nm
• Two techniques are complimentary and provide
complete detail of void structure in porous materials
• Total analysis t
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