Novel Metal Organic Frameworks for CO2 and SO2 capture (NOTT 300)

Description:

NOTT-300
A New Metal Organic Framework CO2 Sorbent Material

Summary

NOTT-300 is a Metal Organic Framework (MOF), a unique CO2 sorbent material.

NOTT-300 is a non-amine-containing porous solid that also adsorbs large amounts of other acidic gases too, such as sulfur dioxide (SO2)

Key Benefits

Adsorption of CO2 and SO2 in NOTT-300 is highly selective with respect to other common gases and this means that these gases can be preferentially captured from mixed gas streams.

Current generation CO2 capture solutions such as ‘amine scrubbing’ have economic and environmental drawbacks such as:

·  Expensive to operate
·  High energy input required for regeneration

NOTT-300 may decarbonise/desulfurise flue gas streams thus eliminating CO2 or SO2 atmospheric release.

NOTT-300 may allow the continued use of fossil fuels in transport and industry sectors.

The separation of CO2 from other valuable gaseous products is essential in a    number of commercially important, multi-million dollar processes.
 
Any sequestered gas held in NOTT-300 is readily released by reducing the pressure about the material, this is a low-energy approach to gas release.

NOTT-300 is inexpensive, chemically/thermally stable and synthesised in water.

Market Sectors
 
Acidic gas capture is relevant to the following industries;

·   Power stations
·   Cement industry
·   Iron smelting
·   Natural gas sweetening
·   Purification of syngas
·   Purification of H2 gas

CO2 capture is required in rebreather systems used in:

·   Personal protective equipment
·   Diving
·   Deep sea exploration
·   Anaesthesia systems

SO2 scrubbing is necessary on maritime vessels to ensure compliance with upcoming MARPOL regulations on SO2 emission levels.


IP Status: Patent Pending

Technical Information:

NOTT-300 can be synthesised from relatively simple and cheap materials using  water as the sole solvent.

NOTT-300 shows high stability towards both heating and water vapour. The material shows excellent adsorption properties for CO2 at ambient temperatures with very high uptake capacities (158 cm3/g, 7.0 mmol/g at 273 K, 1 bar).

                Gas Adsorption Data for NOTT-300

Importantly, we found that NOTT-300 can also adsorb large amounts of SO2 (the highest observed so far) and NO2 without decay of porosity upon recycling. Furthermore, adsorption of CO2, SO2 & NO2 is highly selective with respect to other gases such as CH4, CO, N2, H2, O2, and Ar, which show very low uptakes under the same conditions. This represents the first time that a MOF material can show selective capture of these acidic flue gases.

In addition to these observed high uptake capacity and selectivities for NOTT-300, adsorbed gas molecules are very readily released by reduction of the pressure only, i.e. no heating input is required to release CO2 (or SO2). This is a major advantage compared with CCS systems based upon solutions of amines. We have very recently been able to characterise gas-loaded NOTT-300 and successfully located the positions of CO2 and SO2 within the pores. The material is covered in patent application UK 1205365.8 and was published in Nature Chemistry, 2012, 4, 887–894.

View of CO2 (left) and SO2 (right) sited in the pore of NOTT-300 as determined by PXRD, inelastic neutron scattering and DFT analysis. (Nature Chemistry, 2012)

Patent Information:
For Information, Contact:
Trevor Farren
Business Development Manager
The University of Nottingham
0115 84 66175
trevor.farren@nottingham.ac.uk
Inventors:
Martin Schröder
Sihai Yang
Keywords:
Energy
Science, Technology and Society
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