“Our new analysis shows it is possible to bring down carbon dioxide (CO2) emissions from our iron and steel sector drastically by 2030, while tripling India’s output of steel. We can emit even less than what we do today – but all this will need planning, technology and funds,” says Sunita Narain, director general, Centre for Science and Environment (CSE), referring to CSE’s recent assessment report on the emissions footprints of India’s iron and steel sector and how it can be ‘decarbonised’.
The iron and steel sector is a hard-to-abate sector in terms of greenhouse gas (GHG) emissions; at the same time, it is a critical contributor to the economic development of the country. Globally, the sector accounts for some 7 per cent of total greenhouse gas emissions; in India, the sector’s share is 5 per cent (as per the latest inventory available for 2016).
The new CSE report – Decarbonizing India: Iron and Steel Sector – gives a detailed insight into GHG emissions from the sector and its future emission scenarios for 2030.
The analysis assumes significance with the 27th UN Climate Conference of Parties scheduled to begin in Egypt in November. Says Narain: “Countries like India need to grow and develop, and this at a time when the world is running out of carbon budget to stay below the guardrail of 1.5°C temperature rise. Hence, this growth has to be low in carbon. It must be as green as it can be. How do we ensure the double benefits of reduced emissions and growth? Our new report shows us the way.”
In the iron and steel sector, the manufacturing process determines the amount of CO2 an industrial unit will produce. Coal is key to the production of iron in a blast furnace, and well as for making steel through a basic oxygen furnace (BF-BOF). “This makes the sector hard to decarbonise — roughly half of India’s iron and steel is produced through this route,” says the CSE research.
The other way to manufacture iron is the direct reduced iron (DRI) or sponge iron method. In this, iron is extracted using reducing agents like coal or gas, and steel is produced thereafter through an electric-arc or induction furnace. Says Parth Kumar, programme manager, Industrial Pollution Unit, CSE: “This production process is easier to decarbonise as coal can be replaced by natural gas; also, steel scrap can replace iron ore completely.”
In India, iron and steel manufactured using DRI is far more polluting because it is coal-based. Since sponge iron plants operate largely in the small and medium sectors, there is no impetus to improve their emissions profile. Says Narain: “This is where the opportunity lies; the government should work on a package that involves a cleaner fuel like gas and improves the circularity of the recycled steel business by promoting optimum usage of steel scrap as a raw material.”
The CSE assessment has laid down some calculations based on four scenarios:
- Business as usual (BAU): Based on production in 2030 and the technologies being used currently, GHG emissions will grow 2.5 times by 2030 compared to 2020-21.
- Low-carbon growth pathway: Based on emission targets set by the National Steel Policy 2017, a reduction of 12.5 per cent (82 million tonne or MT) from the BAU scenario is possible.
- Improved low-carbon growth pathway: Based on voluntary targets by large steel companies, a reduction of 22.5 per cent (148 MT) from the BAU scenario can be aimed for.
- Accelerated low-carbon growth pathway: CSE’s proposal, which is based on the best available technologies and options for decarbonisation of the sector, will lead to deeper emission reductions of 419 to 519 MT by 2030. This means, says Kumar, that “emissions from the sector, even after doubling its production, would be lower than what is emitted today.“
The CSE roadmap
Narain says the CSE roadmap “focusses on strategies for both manufacturing routes”.
- CSE recommends a fuel change – in the case of BF-BOF, the use of natural-gas injection or hydrogen to reduce the use of coal is recommended, along with increasing the amount of recycled steel in production to its optimum of 30 per cent.
- The industry should implement carbon capture and utilization to bring down coal-based emissions.
- The switch to new fuels and technologies will require international finance. The government and steel industry should work towards a combined proposal for climate finance with touch targets for 2030 — from 2.2 tonne of CO2 for every tonne of iron and steel to less than 1.5 tonne.
