在资源有限的未来,去碳化全球钢铁行业 - - 一个系统的前景
Takuma Watari1,2, Benjamin McLellan3
1Material Cycles Division, National Institute for Environmental Studies , Tsukuba, Japan.
概括
全球钢铁产量不能在碳限制内增长,以满足未来的需求. 脱碳需要逐步淘汰高炉,增加废料回收和公平的资源分配,而不仅仅是新技术.
科学领域:
- 工业生态学 工业生态学
- 材料科学 材料科学 材料科学
- 气候变化缓解缓解 气候变化缓解
背景情况:
- 全球钢铁行业面临着重大的脱碳化挑战.
- 目前的战略依赖于扩大碳储存,清洁电力和废弃物等有限资源,假设钢铁需求持续增长.
- 现有的分析往往忽视了资源供应的限制.
研究的目的:
- 为钢铁行业提出一个替代性脱碳途径,以现实的资源供应限制为基础.
- 在符合巴黎的碳预算中分析钢铁生产能力.
- 识别技术投资以外的关键挑战.
主要方法:
- 系统分析包括历史趋势和实际的资源供应建设计划.
- 将全球钢铁生产与符合巴黎协议的碳预算进行建模.
- 评估需求减少,废弃物回收利用和公平分配策略.
主要成果:
- 全球钢铁产量无法在碳预算内增加并满足预计的2050年需求,这表明~30%的缺口.
- 脱碳需要逐步淘汰高炉,并大幅增加废料回收和以为基础的钢铁生产.
- 关键的挑战包括减少过度需求,回收高品质钢的废料,并确保公平的全球生产分配.
结论:
- 符合巴黎标准的钢铁行业需要生产水平低于预计需求,与目前以扩张为重点的议程形成鲜明对比.
- 焦点必须转向资源效率,循环经济原则 (废弃物回收利用) 和公平的资源分配.
- 这种以物理为基础的观点为可持续金属的政策制定和工业战略提供了更平衡的方法.
相关概念视频
01:26Steel Manufacturing
372
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
372
01:18Mechanical Characteristics of Steel
400
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
400
01:24Structural Steel Products
147
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
147
01:43Sustainable Development
13.2K
As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
13.2K
02:49Calculating Standard Free Energy Changes
20.7K
The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
20.7K
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K