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Technology Innovation to Accelerate Energy Transitions

Annex B

Chemicals

Developing and deploying innovative technologies and process routes is crucial for chemical and petrochemical sector decarbonisation.

Key new and emerging low-carbon processes involve replacing fossil fuel feedstocks with electrolytic hydrogen, bio-based feedstocks, electricity as a feedstock and captured CO2. Further development of carbon capture, utilisation, transportation and storage technologies will also be important for decarbonisation.

Gap 1: Ammonia production using electrolytic hydrogen

This process route could avoid generating CO2 emissions in ammonia production if renewable electricity is used for hydrogen production.

Technology principles: Ammonia production involves combining nitrogen with hydrogen in the Haber-Bosch process. Hydrogen can be produced either through steam reforming (with natural gas as the feedstock) or through electrolysis (with electricity as the feedstock). Hydrogen produced by electrolysis is often referred to as electrolytic hydrogen.

Read more about this innovation gap (www.iea.org/innovation).

Gap 2: CCUS applied to the chemical sector

Carbon capture is needed to enable chemical production methods that use CO2 as a feedstock. Combined with permanent storage, it could drastically reduce CO2 emissions and even create negative emissions if combined with biomass-based production methods.

Read more about this innovation gap (www.iea.org/innovation).

Gap 3: Methanol production using electrolytic hydrogen and CO2

This production route could avoid direct fossil fuel use in methanol production if renewable electricity is employed for hydrogen production and CO2 can be obtained from either biogenic sources or unavoidable industrial sources. In the short to medium term, fossilbased and otherwise avoidable emissions can also be used. In a strong decarbonisation scenario, unavoidable CO2 emissions from fossil-based industrial by-products would become scarce in the long term, so extracting it from the atmosphere through biomass cultivation or air capture would become increasingly important.

Technology principles: Methanol production requires creation of a syngas composed of CO, CO2 and hydrogen gas. A wide variety of feedstocks can be used to produce the syngas: natural gas and coal are currently the most common, but biomass and waste can also be used. It can also be made from a combination of hydrogen (produced by natural gas-based steam reforming or electricity-based electrolysis) and waste CO2 from industrial processes.

Read more about this innovation gap (www.iea.org/innovation).

Gap 4: Producing aromatic compounds from methanol

This process route could replace fossil fuel feedstocks with low-carbon methanol to produce aromatics using conventional naphtha steam crackers, if low-carbon methanol were available. The method currently being explored uses technology similar to what has already

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