运输应该通过碳捕获和管道或电力转向乙醇吗? 一个案例研究
1Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305-4020, United States.
Environmental science & technology
|October 26, 2023
概括
由风能驱动的电池电动汽车 (BEV) 是使用乙醇和碳捕获的柔性燃料汽车 (FFV) 的优质替代品. 风力发电可以减少二氧化碳排放,节省成本,减少对环境的影响.
科学领域:
- 环境科学 环境科学
- 能源政策 能源政策
- 气候变化缓解缓解 气候变化缓解
背景情况:
- 过渡到可持续运输需要评估替代燃料和车辆技术.
- 使用乙醇 - 汽油混合物与碳捕获和电池电动汽车 (BEV) 的灵活燃料汽车 (FFV) 是主要的选择.
- 评估这些技术的环境和经济可行性对于明智的政策决策至关重要.
研究的目的:
- 将"乙醇计划" (含二氧化碳捕获的FFV) 与"风力计划" (由风能驱动的BEV) 的环境和经济性能进行比较.
- 评估与每个计划相关的二氧化碳减排潜力,土地利用,空气污染影响和消费者成本.
- 分析投资乙醇碳捕获与电动汽车可再生能源的机会成本.
主要方法:
- 一个案例研究将美国5个州34家乙醇炼厂的拟议二氧化碳捕获和管道基础设施与为BEV收费建造风力发电场进行比较.
- 在30年期间对二氧化碳排放,土地足迹,距离要求和经济成本的生命周期评估.
- 对"风力计划A" (电动汽车的风力) 和"风力计划B" (取代煤炭的风力) 与乙醇计划进行比较分析.
主要成果:
- 风力计划A提供了比乙醇计划减少2.4至4倍的二氧化碳.
- 据预计,风力驱动的电动汽车将在30年内为消费者节省400-660亿美元,尽管初始成本更高.
- 与乙醇计划相比,风力计划A需要显著减少土地 (1/400,000th足迹) 和间距 (1/10th-1/20th),同时也减少了空气污染.
结论:
- 乙醇与碳捕获具有显著的机会成本,可能会损害气候和空气质量.
- 对电动汽车的风能投资在环境和经济上优于拟议的乙醇碳捕获基础设施.
- 该研究强调了乙醇计划对土地利用,空气质量和消费者财务的不利影响,倡导可再生能源解决方案.
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