Why Biomass Fuels Are Principally Not Carbon Neutral
نویسندگان
چکیده
In order to realistically fulfil global and national climate protection targets, all potential measures have be made use of a maximum extent. Because it is readily available, biomass energy has been playing key practical role for decades, supported by the traditional assumption its carbon neutrality: under sustainable conditions, dioxide emitted during combustion held equal absorption plant growth. clarify conditions (C) neutrality, therefore necessary model annual natural C cycle on entire planet include changes caused variety growth strategies fuels. The “Combined Energy Biosphere Model” CEBM calculates growth, decay, fuel production 2433 grid elements worldwide. results suggest that over many pools litter especially soil organic (i.e., humus layer) deplete considerably as consequence interrupted cycle. Overall, based this finding, earlier “carbon-neutral fuels” disapproved in long-term evaluation and—as coarse rule thumb—might reduced “half neutral previously assumed” (when compared current mix). On top principal effect, well known life-cycle emissions, indirect or secondary emissions such input related production, transport conversion into fuels will still add already principally highly incomplete neutrality biomass.
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ژورنال
عنوان ژورنال: Energies
سال: 2022
ISSN: ['1996-1073']
DOI: https://doi.org/10.3390/en15249619