Gasification

Gasification is a process that converts materials containing carbon, such as coal, petroleum coke, biomass or waste into synthesis gas that can be burned in a turbine to produce electricity or further processed to manufacture chemicals, fertilizers, liquid fuels, or hydrogen.

Going to extreme

Gasification converts carbonaceous material to synthesis gas through partial oxidation at about 1200 °C with air, oxygen, steam, carbon dioxide, or a mixture of these gases. Once the fuel is in a gaseous state, undesirable substances, such as sulfur compounds and coal ash, may be removed from the gas to yield a useful and clean energy resource.

The gasification process typically requires oxygen to be controlled at 35% of the theoretically required amount for complete combustion.  This ensures that both heat and new gaseous fuel are produced as the feed material is consumed. Pyrolysis under gasification conditions decomposes the feedstock to yield solid carbon and a gas product stream that has higher hydrogen content than the original feed material.

Flow control products are required to precisely and reliably control the process, especially the introduction of feedstocks and the moderation of process temperature. Most importantly, flow control products are key to protecting the people and property surrounding the process. With the presence of high heat and flammable gases, explosion and fire hazards must be mitigated. Flaring systems, burner managements systems and emergency shut down systems must be well maintained and work reliably when they need to.

Security in severe service applications

Metso has a long record of success in severe service applications and has been working to develop solutions specifically to overcome the challenges of gasification since 1991. Between our commitment to R&D and our history as innovators in metal-seated technology it is not surprising that so many come to Metso for their toughest applications.

Trunnion mounted ball valves, for wide range of pressure classes having full metal-to-metal seats and tungsten carbide hard facing on sealing surfaces, will provide safe and reliable-long term operation. Valve material selection is based on international material codes, like BAM for oxygen service, to ensure safety and reliability in the process. Valves can be equipped with additional flow port lining and protection with AISI 410 series stainless steel removable and easily replaceable liners, to extend valve operation life against wear and erosion in flow port areas.

Maximum process up-time

High pressure ball valves from Metso feature numerous innovations to the seat design and material that provide tight, safe shut-off while also helping to reduce galling and abrasion that can reduce the integrity and operational life of a valve. We work with customers and make every effort to understand their application challenges to make sure that the most appropriate seat materials and valve coatings are used. The result is that valve life and service intervals are extended resulting in greater uptime and lower maintenance.

Benefits

  • Enhanced process safety and uptime
  • Long lasting performance
  • Maximize production
  • Longer service intervals

Discover the Metso difference

We pride ourselves on our technical know-how and understating of our customers’ challenges. Learn more about our product offering and see a case to learn how Metso supports our customers.

Application report

Coal gasification