Decarbonisation Technology May 2022 Issue

Pathway 1: Increase energy eciency

Pathway 2: Make lower-carbon energy products

Pathway 3: Capture and store the remaining emissions

Ensuring that the facilities that bring energy products to customers use energy as eciently as possible

Reducing greenhouse gas emissions from products’ end use

Mitigating emissions with carbon sinks

Figure 3 The three classic decarbonisation pathways

significantly more CO₂ will be sequestered via CCS. The decarbonisation activities set to transform Pernis refinery are integrated into the three classic decarbonisation pathways, as shown in Figure 3 . Pathway 1: Increase energy efficiency Pathway 1 targets energy efficiency. Across all of Shell’s downstream assets, teams are working to reduce the carbon intensity of refinery operations. At the Pernis site, a recent energy-efficiency programme helped to cut CO₂ emissions by the equivalent of the annual emissions of 50,000 cars. Our industry has been trying to find efficiency savings opportunities for years, but an integrated decarbonisation strategy that includes mitigating GHG emissions goes well beyond this.

Pathways 2 and 3 represent the biggest departure from historical activities at the Pernis site. In Pathway 2, the central aim is to help our customers decarbonise, so we need to provide them with lower-carbon energy products. For this, Pernis refinery will be producing green hydrogen and biofuels via exciting new processes. Pathway 3 involves significantly increasing the level of CCS via the Porthos project. Pathway 2: Make lower-carbon energy products For Shell, developing lower-carbon fuels lies at the heart of its decarbonisation strategy. Pernis refinery will produce 820,000 t/y of low-carbon fuels in a new hydroprocessed esters and fatty acids (HEFA) unit, using the Shell Renewable Refining Process (see Figure 4 ). Pernis refinery

HDO MP stripper New

Product stripper Existing

Hydrogen

Renewable diesel and jet

Feedstock

Pretreatment

First stage Hydrogenation and hydrodeoxygenation

Second stage Hydroisomerisation

Unique pretreatment filter ‘add-on’ helps reduce pretreat unit size and C apex.

With poisons removed, can utilise superior performance of noble metal catalyst to increase overall yield, minimise wild naphtha and further reduce cold ow properties.

Can process wide range of feeds with varying exotherms. Removes poisons, CO , and CO for enhanced second - stage performance.

Figure 4 The Shell Renewable Refining Process