Sorption of Soil Carbon Dioxide by Biochar and Engineered Porous Carbons.
In: Environmental science & technology, Jg. 58 (2024-05-14), Heft 19, S. 8313-8325
academicJournal
Zugriff:
CO 2 is 45 to 50 times more concentrated in soil than in air, resulting in global diffusive fluxes that outpace fossil fuel combustion by an order of magnitude. Despite the scale of soil CO 2 emissions, soil-based climate change mitigation strategies are underdeveloped. Existing approaches, such as enhanced weathering and sustainable land management, show promise but continue to face deployment barriers. We introduce an alternative approach: the use of solid adsorbents to directly capture CO 2 in soils. Biomass-derived adsorbents could exploit favorable soil CO 2 adsorption thermodynamics while also sequestering solid carbon. Despite this potential, previous study of porous carbon CO 2 adsorption is mostly limited to single-component measurements and conditions irrelevant to soil. Here, we probe sorption under simplified soil conditions (0.2 to 3% CO 2 in balance air at ambient temperature and pressure) and provide physical and chemical characterization data to correlate material properties to sorption performance. We show that minimally engineered pyrogenic carbons exhibit CO 2 sorption capacities comparable to or greater than those of advanced sorbent materials. Compared to textural features, sorbent carbon bond morphology substantially influences low-pressure CO 2 adsorption. Our findings enhance understanding of gas adsorption on porous carbons and inform the development of effective soil-based climate change mitigation approaches.
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Sorption of Soil Carbon Dioxide by Biochar and Engineered Porous Carbons.
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Autor/in / Beteiligte Person: | Ringsby, AJ ; Ross, CM ; Maher, K |
Zeitschrift: | Environmental science & technology, Jg. 58 (2024-05-14), Heft 19, S. 8313-8325 |
Veröffentlichung: | Washington DC : American Chemical Society ; <i>Original Publication</i>: Easton, Pa. : American Chemical Society, c1967-, 2024 |
Medientyp: | academicJournal |
ISSN: | 1520-5851 (electronic) |
DOI: | 10.1021/acs.est.4c02015 |
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