Stories

Avoiding CO2 – at customers’ plants and in our own plants

The best way for us to protect the climate is to ensure CO2 emissions are not generated in the first place. We will achieve significant reductions in emissions by the end of this decade as a result of efficiency measures in our own plants. We apply Linde technologies for more sustainable processes in industry along the entire value chain. Linde technology, for example, helps our customers separate CO2 from the waste gases in their industrial plants, so it can be used as an industrial raw material or to recycle waste water. A win-win situation for our customers and the environment.

Here you can find out more about the measures we have taken.

Using CO2 as a raw material

1,500 tonnes CO2 waste gas recycled as an industrial raw material – every day

Al Jubail, one of the world’s largest petrochemical complexes, unlocks promising carbon capture and utilization opportunities.

For a long time, carbon capture and utilisation technology has been one way of reducing carbon emissions. Our flagship project in Saudi Arabia is also proving economic benefits.

Making carbon capture and utilisation economically viable

Awareness of major ecological challenges is growing in every region of the world. With the official launch of its sustainability strategy, Saudi Arabia also set a course towards decarbonisation. In the Al Jubail industrial complex on the Persian Gulf, we constructed the largest CO2 purification and liquefaction plant in the world for the petrochemical group Jubail United Petrochemical Company. Since February 2017, this plant has been operating at full capacity, demonstrating that the large-scale deployment of carbon capture and utilisation (CCU) not only makes ecological sense but is also attractive from an economic perspective. The CCU plant separates CO2 before it can escape into the atmosphere and purifies it, so that it can be used as an industrial raw material in the production of methanol and urea. The recycled CO2 comes from two ethylene factories nearby, where it is a by-product of the oxidation of ethylene and oxygen. The plant can also produce 200 tonnes of liquefied food-quality CO2 per day, which is transported to food and drink manufacturers. The use of this technology means that around 500,000 fewer tonnes of greenhouse gases are escaping into the air every year.

Treating waste water

300 cubic metres contaminated water cleaned – every hour

With SOLVOCARB®, Linde has developed a reliable and safe concept for injecting gases into liquids to neutralize waste water.

Feeding in carbon dioxide is a fast and ecofriendly way for a textile manufacturer in Turkey to neutralise its industrial waste water and make it reusable.

Treating industrial waste water with CO2

Clean water is a vital resource. Legal requirements around the world relating to water quality and environmental protection are becoming stricter. For the most part, industrial waste water can only be discharged into sewage systems if it falls within a narrow pH range. Linde’s SOLVOCARB® venturi is a very efficient process for treating such waste water. It is a fast and ecofriendly way to use carbon dioxide to neutralise alkaline water and is being applied successfully by textile manufacturer Bossa Denim in Adana in Turkey. Every hour, up to 300 cubic metres of waste water is brought here to the required pH level by feeding in around 275 kilograms of CO2. The Linde process also increases operational safety at the plant and reduces its costs. This is because, in contrast to the substance used previously to treat the waste water (sulphuric acid), fewer corrosive substances are produced when CO2 is used. This helps, for example, to avoid damage to pipes and reduces maintenance costs. The new system meets all the requirements of the local utility company, ensuring the pH level of the waste water moves into the green range.

Avoiding carbon dioxide

6 million tonnes CO2 emissions avoided – our goal worldwide

At its air separation plant in Ningbo, China, Linde has overhauled processes, thereby reducing costs and emissions.

By applying a range of efficiency measures, we want to reduce global CO2 emissions arising from the operation of our HyCO and air separation plants by around 6 million tonnes by 2020.

Exploiting every opportunity to reduce greenhouse gas emissions

When it comes to global climate protection, every measure counts at every single location. In many large industrial plants, energy-saving potential is just waiting to be tapped. This could make a substantial contribution to the reduction of harmful emissions. We have therefore set ourselves the target of avoiding a total of 6 million tonnes of CO2 emissions from hydrogen and synthesis gas plants (HyCO plants) and air separation plants around the world by 2020. As a contribution to the success of this initiative, we overhauled an air separation plant in Ningbo, China, in 2017. The entire plant was reconditioned in order to achieve a more efficient use of energy. Filters and pipes in the sea water cooling system are being cleaned and serviced on a regular basis. Steam compressors and flow meters have also been better adapted to the specific needs of the plant, not only optimising its performance, but also reducing its energy requirement. Thanks to these efficiency measures, the whole plant now needs around 8,000 fewer megawatt hours of electricity per year. This has resulted in cost savings of EUR 600,000 for us as the operator of the plant and around 10,000 fewer tonnes of CO2 emissions per year.