Sci. Tech. Energ. Transition
Volume 78, 2023
|Number of page(s)||12|
|Published online||20 July 2023|
Geologic perspective for carbon sequestration by woody biomass burial
Geoclime, LLC, P.O. Box 13, Seabrook, TX 77586, USA
* Corresponding author: firstname.lastname@example.org
Accepted: 26 June 2023
Carbon sequestration by Woody Biomass Burial (WBB) leverages carbon capture through natural photosynthesis, followed by the isolation of dead or fallen wood in a relatively shallow Underground Wood Vault (UWV). Long-term geologic containment, including any greenhouse gas decomposition products, depends on the careful selection of UWV location and depth. To achieve carbon sequestration durability of 100 y, an initially low-moisture UWV should be built as follows: (a) low-permeability, high-plasticity clays with a hydraulic conductivity of ≤10−9 m/s, and with vertical/lateral separation distance of ≥1 m from the nearest aquifer; (b) residual compaction voids at least partially filled, with loose, smectite-rich clay; (c) capped with ≥2 m of clay compacted to achieve hydraulic conductivity <5 × 10−9 m/s; (d) restricted to locations where the 50-y seismic Peak Ground Acceleration (PGA) is ≤9% g (8.8 × 10−1 m/s2). A UWV built in a low-PGA location, with larger cap and confinement thicknesses and/or lower hydraulic conductivity, should be capable of sequestration durability approaching 500–1000 y or more.
Key words: Carbon sequestration / Woody biomass burial / Wood harvest sequestration / Wood vault / Carbon storage geology
© The Author(s), published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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