Applying consequential LCA to support energy policy: Land use change effects of bioenergy production
Applying consequential LCA to support energy policy: Land use change effects of bioenergy production
复制标题
DOI：
10.1016/j.scitotenv.2013.10.097
复制
发表时间：
2014-02-15
影响因子：
9.8
通讯作者：
Benetto, Enrico
中科院分区：
文献类型：
--
作者：
Vazquez-Rowe, Ian;Marvuglia, Antonino;Benetto, Enrico
卢森堡的目标是遵守欧盟的目标，到2020年在国家电网中实现14%的生物能源使用。增加能源作物的生物甲烷产量可能是实现这一目标的一个有价值的选择。然而，这种选择的整体环境效益尚未得到证实。结果生命周期评估（CLCA）已被证明是评估未来能源方案和政策的环境适宜性的有用工具。因此，本研究的目的是评估修改卢森堡农业系统以增加玉米产量以产生生物甲烷的环境后果。利用部分均衡（PE）模型对总共10种不同情景进行建模，以确定基于农民收入最大化的土地种植变化，然后将其与基线情景（即2009年农业部门的状况）进行比较。结果被划分为三种不同的相应决策背景，在土地利用变化（LUCs）方面表现出不同的模式，但环境影响的变化较小。然而，与目前使用天然气相比，玉米生产的能源对环境的影响要大得多，这主要是由于气候变化和农业用地占用影响的增加。这些结果是根据它们可能对生物能源政策、可耕地管理、卢森堡进出口流量的变化和国内农业系统的土地利用效益产生的后果进行讨论的。此外，提出的具体PE + LCA方法打算用于其他区域研究，其中有高水平的特定地点数据可用。(c) 2013 Elsevier B.V.版权所有
Luxembourg aims at complying with the EU objective of attaining a 14% use of bioenergy in the national grid by 2020. The increase of biomethane production from energy crops could be a valuable option in achieving this objective. However, the overall environmental benefit of such option is yet to be proven. Consequential Life Cycle Assessment (CLCA) has shown to be a useful tool to evaluate the environmental suitability of future energy scenarios and policies. The objective of this study was, therefore, to evaluate the environmental consequences of modifying the Luxembourgish agricultural system to increase maize production for biomethane generation. A total of 10 different scenarios were modelled using a partial equilibrium (PE) model to identify changes in land cultivation based on farmers' revenue maximisation, which were then compared to the baseline scenario, i.e. the state of the agricultural sector in 2009. The results were divided into three different consequential decision contexts, presenting differing patterns in terms of land use changes (LUCs) but with minor shifts in environmental impacts. Nevertheless, energy from maize production would imply substantially higher environmental impacts when compared with the current use of natural gas, mainly due to increases in climate change and agricultural land occupation impacts. The results are discussed based on the consequences they may generate on the bioenergy policy, the management of arable land, the changes in import-export flows in Luxembourg and LUCs in the domestic agricultural system. In addition, the specific PE + LCA method presented intends to be of use for other regional studies in which a high level of site-specific data is available. (c) 2013 Elsevier B.V. All rights reserved.