Cement, steel, chemicals – the industrial world is still dependent on fossil fuels, and accounts for a large portion of global emissions. Here’s how we can decarbonize it anyway with technological leaps and new industry collaborations.
In the race to avoid climate disasters, the focus is often on how to cut avoidable emissions, especially CO2. But what about the places where emissions are difficult to avoid? These so-called hard-to-abate industries form a large part of our global emissions and reducing them is the key to a greener future.
Hard-to-abate industries include categories like steel, cement, and petrochemicals. Each uses carbon as an integral part of their process, and altogether this sector accounts for about 30% of the world’s greenhouse gas emissions. For example, one of the main ingredients in cement, clinker, is made by heating limestone to extreme temperatures. The process releases carbon trapped in the stone, which combines with oxygen in the atmosphere to form CO2. It’s an unavoidable part of the process.
The International Energy Agency’s Worlds Energy Outlook 2022 paints a dire picture: under its Stated Policies Scenario, where we continue with today’s announced policies, temperatures would rise by an average of 2.5°C. If we continue along this path, we won’t be able to contain global warming at 1.5°C. Only by achieving net zero emissions by 2050 will warming be held to manageable levels. This means reducing emissions everywhere, including in industries, and requires $4 trillion in yearly investments.
While it may be tempting to write these hard-to-abate industries off as not feasible to decarbonize, our climate goals will not be met without them. We’re not on track to meet the Intergovernmental Panel on Climate Change (IPCC) targets. Emissions from energy combustion and industrial processes increased in 2021 – more than reversing the pandemic-related decline from the year before. If we continue along this path, we will not be able to contain global warming at 1.5°C.
Even before the war in Ukraine upended the global energy market, the question of how to reduce emissions in the industry came with complex answers. The war has drastically changed the price of electricity and energy and global supply chains.
It is also the turning point for our energy systems. With the price of gas and electricity at historic highs, long-term structural changes to diversify our energy supply might help us speed up the energy transition. We’ve seen the first steps with the United States Inflation Reduction Act and the European Union’s Fit for 55 package.
So, how do we tackle hard-to-abate industries? The short answer is it’s not easy.
To start, we can focus on innovation, especially in areas where we can replace carbon-intensive materials with alternatives. For example, Siemens Energy is driving decarbonization with its state-of-the-art gas turbines. They are already capable of running on hydrogen mixes. By 2030, all our gas turbines will be 100 percent hydrogen ready.
The chemical industry will be a big beneficent of this hydrogen readiness. In Brazil, Siemens Energy is working with Braskem, one of the largest makers of thermoplastic polymers. Together, Siemens Energy and Braskem designed a plant that uses residual process gas with up to 60% hydrogen content, thanks to Siemens Energy’s state-of-the-art gas turbines. This way, Braskem can drastically reduce CO2 emissions while producing materials.
There needs to be more than innovation on its own. To tackle the problem of hard-to-abate industry emissions, we must form alliances. If we continue working in silos, we might be able to individually reduce emissions in spots. Only by working together and sharing knowledge can we scale those innovations to where they can make a difference.
At Siemens Energy, we’ve co-initiated the Alliance for Industry Decarbonization, which unites 13 companies across industry sectors and the International Renewable Energy Agency.
Both efforts – technological innovations and alliances – will need a proper political framework. Government and industry need to work together to make these technologies available to everyone at an affordable price.
Combined picture and video credits: Siemens Energy