TECH OFFER

Carbon Capture from Dilute Flue Gases Using Aqueous Ammonia

KEY INFORMATION

TECHNOLOGY CATEGORY:
Sustainability - Low Carbon Economy
Waste Management & Recycling - Industrial Waste Management
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TECHNOLOGY READINESS LEVEL (TRL):
LOCATION:
Singapore
ID NUMBER:
TO174692

TECHNOLOGY OVERVIEW

Nearly half of Singapore’s carbon dioxide (CO2) emissions come from dilute flue gases (3 – 5% CO2 concentration) emitted by natural gas-fired power plants and refineries processes. CO2 capture from dilute flue gases is very challenging due to the large volumes of gases that needs to be processed to capture each tonne of CO2. Moreover, conventional CO2 capture solvent such as monoethanolamine (MEA) is corrosive in nature and struggles to keep up with the CO2 volume requirements. Furthermore, using MEA as a solvent is an energy intensive process which severely limits its application.

This technology offer is a process which uses aqueous ammonia as a substitute for MEA to capture CO2. Aqueous ammonia is cheaper, safer, and more readily available compared to MEA. In addition, absorption/desorption using aqueous ammonia occurs at much lower temperature (50-80°C vs >120°C) compared to MEA. This significantly reduces both the CAPEX and OPEX of the system.

The technology owner is looking for partners especially those in high CO2 emitting industries for further co-development and test bedding of the solution. The technology owner is also keen to license this technology as well.

TECHNOLOGY FEATURES & SPECIFICATIONS

This technology offer is a process to capture CO2 (even in dilute concentrations) using aqueous ammonia. The features and specifications of the technology are as follows:

  • Aqueous ammonia absorbent (cheaper, readily available, and less corrosive than MEA)
  • Absorption step occurs at slightly chilled conditions
  • Desorption/regeneration are significantly lower than MEA (50-80°C vs >120°C)
  • Lower CAPEX and OPEX

POTENTIAL APPLICATIONS

This technology can be applied for industries who are looking to capture or consume CO2. The potential applications are:

  • CO2 capture (e.g. Oil & gas, energy and manufacturing industries etc.)
  • High concentration CO2 application (e.g. Enhanced oil recovery, concrete curing, manufacturing purpose etc.)

Unique Value Proposition

  • Milder operating conditions
  • Higher CO2 loading per unit volume of solvent
  • Less corrosive compared to MEA
  • Cheaper CAPEX and OPEX
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