Título:	Direct land-use change CO2 emissions from soybean biodiesel expansion in Brazil.
Autor:	OLIVEIRA, C. E. de AMARAL, D. R. do BATISTA, A. M. FOLEGATTI, M. I. da S. PAZIANOTTO, R. A. A. RAMOS, N. P. PIGHINELLI, A. L. M. T. MACIEL, V. G. NOVAES, R. M. L.
Afiliación:	C. E. de OLIVEIRA; D. R. do AMARAL; A. M. BATISTA; M. I. da S. FOLEGATTI; R. A. A. PAZIANOTTO; N. P. RAMOS; A. L. M. T. PIGHINELLI; V. G. MACIEL; R. M. L. NOVAES.
Año:	2025
Referencia:	In: THE BRAZILIAN BIOENERGY SCIENCE AND TECHNOLOGY AND IEA BIOENERGY CONFERENCE, 10., 2024, São Paulo. Proceedings... São Paulo: Sociedade de Bioenergia, 2024. Ref. E-14.
Páginas:	p. 114.
Descripción:	Biodiesel (BD) production from soybeans is expanding, driven by blending mandates and permits for both road and marine transportation in Brazil. Soybean area growth may result in direct land-use change (DLUC) and CO2 emissions associated with BD production. These can vary according to regions and management practices, but comprehensive data of their impact in BD footprints at regional level in Brazil are scarce. The aim of this study is to quantify DLUC CO2 emissions from potential soybean expansion scenarios for BD production across 295 microregions where soybean is currently produced in Brazil. Emissions were estimated in accordance with 2019 IPCC guidelines, REDIII, and RenovaBio. Additionally, updated carbon stock data were used based on BRLUC method (Tier 1 and 2). Scenarios involve soybean expansion over natural and agricultural lands, average yields, no-till practices, and 65% emissions allocation to soybean meal. Results show that CO2 emissions of BD produced from soybean converted from natural vegetation surpasses fossil fuel emissions (>86.5 gCO2eq MJ-1 ) in all 295 microregions (957 to 11,587 gCO2eq MJ-1 ) and in 292 (99%) of them when annualizing by 20 years (73 to 604 gCO2eq MJ-1 yr-1 ), reinforcing the unsustainability of converting natural vegetation for BD production. BD produced from soybean expansion over pastures can result in either DLUC CO2 emissions or removals, depending on pasture quality and location. Conversion of severely degraded pastures result in DLUC CO2 removals in 287 (97%) microregions, lowering BD’s carbon intensity. Other degradation levels result in DLUC emissions ranging from 2 to 79 gCO2 MJ-1 (for BD from 28 to 105 gCO2eq MJ-1 ). Although this study does not account for ILUC or carbon stock uncertainties, which require further investigation, it reinforces that bioenergy policies should prioritize feedstock expansion over severely degraded pastures and the use of accurate data for DLUC estimates when expansion occurs over pastures.
Thesagro:	Soja
NAL Thesaurus:	Biodiesel Land use
Palabras clave:	Blending mandates Natural vegetation Degraded pastures
Tipo de Material:	Resumo em anais e proceedings
Acceso:	openAccess
Aparece en las colecciones:	Resumo em anais de congresso (CNPMA)