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Bioenergy carbon emissions footprint considering the biogenic carbon and secondary effects
Author(s) -
Fan Yee Van,
Klemeš Jiří Jaromír,
Ko Chun Han
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5409
Subject(s) - bioenergy , carbon neutrality , greenhouse gas , carbon footprint , environmental science , biomass (ecology) , carbon fibers , natural gas , coal , life cycle assessment , energy source , bio energy with carbon capture and storage , biofuel , environmental engineering , waste management , climate change mitigation , engineering , ecology , economics , mathematics , production (economics) , biology , macroeconomics , algorithm , composite number
Summary The sustainability of bioenergy is varying on a case‐by‐case basis. It considerably depends on the source of biomass, management practices (plantation, harvesting, conversion technologies, supply chain, etc.) as well as the assessment boundary and assumptions. This study summarises the carbon emissions footprint (CF) flow of bioenergy by considering the possible sources and system boundary, particularly on the CF of biogenic carbon and secondary effects. The assessment framework has been applied to a demonstrated case study identifying the upper limits of global warming potential of biogenic carbon emission (GWP bio ) and secondary effects contribution where the bioenergy is still superior to the coal, natural gas and gasoline. The circumstances where the other energy source alternatives could have a lower CF than bioenergy are highlighted. For example, coal and natural gas are the selection (lower CF) if the bioelectricity is subjected to the GWP bio higher than 0.57‐0.74 and 0.18‐0.34. CF of bioheat is higher than the heat generated by natural gas when the GWP bio is more than 0.04‐0.40. Gasoline is the selection when the GWP bio of biofuel is higher than 0.12‐0.42. The validity of carbon neutrality assumption of bioenergy possesses a more decisive role in the overall selection of bioenergy compared to the assessed secondary effects such as soil organic carbon changes. This study emphasises the importance of a rigorous CF accounting for bioenergy to support the equitable decision making. Novelty Statement The novel contributions of this study are: Summarising of the direct and secondary (soil organic carbon changes ‐ above and belowground, biochar application) effects in accounting the CF for a comprehensive assessment framework. Identifying the CF, integrated with biogenic and non‐biogenic accounting, of bioenergy from energy crops and waste/residual. Comparing the identified CF of bioenergy to the other energy alternatives (fossil‐based).