Aluminium, as a key material in electric vehicles, solar panels, and renewable energy infrastructure, is expected to see a 40% increase in demand by 2050. However, the production process of aluminium is highly energy-intensive. In 2023 alone, the global aluminium industry emitted approximately 1.12 billion tonnes of CO₂ equivalent, accounting for about 2% of global greenhouse gas emissions.
The Core of High Emissions: Electrolytic Aluminium Smelting
The main source of emissions in aluminium production lies in the electrolytic smelting process, which requires temperatures around 960°C and a massive amount of electricity. On average, producing one tonne of aluminium consumes 14 megawatt-hours of electricity — equivalent to the electricity usage of a medium-sized household in the UK for five years. In China, which accounts for 60% of global aluminium production, most smelters rely on coal power, resulting in high emission intensity.
Green Transformation Path: Renewable Energy and Technological Innovation
To achieve net-zero goals, aluminium producers are taking several measures:
Renewable Energy Power Supply
Aluminium smelters in China are relocating to regions like Yunnan that are rich in hydropower, although drought and other natural factors may pose challenges.
Inert Anode Technology
Companies like Rio Tinto and Alcoa are developing inert anode technology through the ELYSIS project to replace traditional carbon anodes and reduce direct carbon emissions.
Carbon Capture and Storage (CCS)
Despite being costly and technically complex, some companies are exploring the application of CCS in aluminium smelting.
Aluminium Recycling
Producing recycled aluminium consumes only 5% of the energy required for primary aluminium, making it a highly cost-effective emission reduction strategy. For example, Emirates Global Aluminium (EGA) is building a new recycling plant to increase the utilization of scrap aluminium.
Policy and Market Drivers
With policies like the EU’s Carbon Border Adjustment Mechanism (CBAM) coming into effect, and the expansion of carbon trading systems, the aluminium industry is under growing pressure to reduce emissions. Although green aluminium products may cost more, rising consumer demand for sustainable goods is providing market momentum for the industry’s transformation.
Implications for the Tinplate Packaging Industry
Although tinplate is primarily made from tin-coated steel, aluminium is increasingly used in the packaging industry — particularly for its lightweight and recyclability. The green transition of aluminium offers the following insights for the tinplate packaging industry:
Optimization of Energy Structure
Consider using renewable energy-powered production facilities to lower carbon footprints.
Technological Innovation
Explore low-carbon production technologies, such as more efficient tin-coating processes, to reduce energy consumption.
Recycling System Development
Establish a comprehensive recycling system to improve the recovery rate of tinplate packaging and promote circular economy practices.
Market Communication
Strengthen communication with consumers, highlighting the sustainability and environmental benefits of tinplate packaging to enhance brand image.
By drawing lessons from the aluminium industry’s emission reduction strategies, tinplate packaging companies can achieve sustainable development while meeting the global demand for eco-friendly packaging.
