Towards a non-ambiguous view of the amortization period for quantifying direct land-use change in LCA

Maciel, Vinícius Gonçalves; Novaes, Renan Milagres Lage; Brandão, Miguel; Cavalett, Otávio; Pazianotto, R. A. A.; Garofalo, Danilo Trovo; Folegatti‐Matsuura, Marília I. S.

doi:10.1007/s11367-022-02103-3

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…Additionally, given the current difficulty associated with LUC estimations, the use of LUC GHG emissions intensities to support sustainability certification schemes is under debate. This is particularly relevant when considering the inconsistencies associated with the arbitrary definition of amortisation factors (Maciel et al 2022).…”

Section: Discussionmentioning

confidence: 99%

“…The LUC GHG intensity is estimated based on the ratio of total cumulative GHG emissions from LUC the total cumulative bio-SAF demand (TBS) of each scenario, over the 25 year amortisation period, as adopted by ICAO CORSIA methodology to certify bio-SAFs (ICAO 2021, Zhao et al 2021) (equation ( 5)). As highlighted by Newell and Vos (2012), Nemecek et al (2019) and Maciel et al (2022), a dynamic time period to amortise LUC emissions should be applied to better reflect the complexity of carbon fluxes during land conversion processes. However, in order to compare our results with ICAO CORSIA guidelines we opted to consider a uniform amortisation period of 25 years.…”

Section: Induced Lucmentioning

confidence: 99%

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Sustainable aviation fuels must control induced land use change: an integrated assessment modelling exercise for Brazil

Fiorini

Angelkorte

Portugal‐Pereira

et al. 2023

Environ. Res. Lett.

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Bio-sustainable aviation fuels (bio-SAFs) are an important pillar of the aviation sector decarbonisation strategy in the mid-term. Here we assess the induced land-use change (LUC) implications of producing bio-SAFs in Brazil under different assumptions of forest conservation governance. We evaluate four bio-SAF routes via two main pathways: the Alcohol-to-Jet (ATJ) and the Hydroprocessed Esters and Fatty Acids (HEFA) syntheses. We chose the most promising agriculture-based feedstocks to produce bio-SAFs in macro-regions of Brazil, including sugarcane and maize ethanol to jet (ATJ) and palm and macaw HEFA routes. To this end, we calculated future projections of air transport demand in Brazil and used the Brazilian Land Use and Energy Systems (BLUES) Integrated Assessment Model (IAM) to estimate LUC greenhouse gas (GHG) emissions within five different levels of bio-SAF blends (10% to 50% of total aviation fuel demand) for each bio-SAFs evaluated. Estimated cumulated emissions vary widely, ranging from a carbon sequestration of -286.8 gCO2e.MJ-1 for a 10% blend of maize ATJ under a controlled deforestation scenario to a release of 15.0 gCO2e.MJ-1 for a 40% blend of high productivity macaw oil HEFA considering historical deforestation rates in the country. Results are highly sensitive to deforestation rate parameters, volume of bio-SAFs produced and the type of feedstock used. Negative LUC GHG emissions were found under controlled deforestation assumptions and in low blends of bio-SAFs for maize and sugarcane ATJ routes. Under historical deforestation rates, the LUC GHG emissions are higher. Bio-SAF can be beneficial to reduce GHG emissions if effective land conservation policies are implemented. Therefore, large-scale bio-SAF production from sugar crops in Brazil may play an important role in the decarbonisation of the aviation sector if coupled with successful strategies to control deforestation. Additionally, when imposing bio-SAF demand, other biofuels demand reduces under the model optimal solution due to land restrictions.

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Section: Discussionmentioning

confidence: 99%

Section: Induced Lucmentioning

confidence: 99%

Sustainable aviation fuels must control induced land use change: an integrated assessment modelling exercise for Brazil

Fiorini

Angelkorte

Portugal‐Pereira

et al. 2023

Environ. Res. Lett.

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“…Collecting accurate and representative data is a challenge in LCA in general, leading to uncertainties; in particular for bio-based energy and materials, the issue of including carbon storage and accounting for the time lag between carbon dioxide update and emissions must be addressed (Levasseur et al, 2010;Martin-Gamboa et al, 2020). Temporal representativeness and uncertainty can significantly affect the results, with the amortization period of LUC being a case in point (Maciel et al, 2022).…”

Section: Lca Of Biofuels and Bioproductsmentioning

confidence: 99%

Life cycle assessment for sustainability assessment of biofuels and bioproducts

Gheewala

2023

Biofuel Res. J.

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Bio-based materials have been used traditionally for millennia. Their use was overtaken in recent times by the discovery and utilization of fossil-based resources for materials and energy. However, concerns about the non-renewability of fossil resources and greenhouse gas and other emissions associated with their use have brought forth a renewed interest in using bio-based materials in recent years. The environmental advantages of bio-based materials cannot be taken for granted without a rigorous scientific assessment. Many tools based on energy, economics, and environmental impacts have been used. Life cycle assessment is one such tool developed and successfully utilized for the environmental assessment of biofuels and bioproducts. However, many methodological challenges, among other things related to system boundaries, functional units, allocation, and carbon accounting, still need further research and consideration. In this work, the related issues are summarized, and the directions for addressing them are discussed. Despite the methodological challenges in their assessment, biofuels and bioproducts show promise in terms of their environmental advantages compared to their fossil-oriented counterparts. These advantages can be further enhanced by utilizing all parts of the feedstock biomass, especially for value-added materials and chemicals via biorefineries.

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Modelling greenhouse gas emissions of land use and land-use change using spatially explicit land conversion data for French crops

Boton,

Nitschelm,

Juillard

et al. 2024

Int J Life Cycle Assess

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Towards a non-ambiguous view of the amortization period for quantifying direct land-use change in LCA

Cited by 9 publications

References 37 publications

Sustainable aviation fuels must control induced land use change: an integrated assessment modelling exercise for Brazil

Sustainable aviation fuels must control induced land use change: an integrated assessment modelling exercise for Brazil

Life cycle assessment for sustainability assessment of biofuels and bioproducts

Modelling greenhouse gas emissions of land use and land-use change using spatially explicit land conversion data for French crops

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