Sorbent and devices for capturing, stabilizing and recovering volatile and semi-volatile compounds
AssigneeXplosafe, LLC
InventorsShoaib F. Shaikh, Allen W. Apblett, Nicholas F. Materer, Evgueni Kadossov, Michael L. Teicheira
Life of this patent
Estimating the term…
Abstract
The present invention provides an improved sorbent and corresponding device(s) and uses thereof for the capture and stabilization of volatile organic compounds (VOC) or semi-volatile organic compounds (SVOC) from a gaseous atmosphere. The sorbent is capable of rapid and high uptake of one or more compounds and provides quantitative release (recovery) of the compound(s) when exposed to elevated temperature and/or organic solvent. Uses of particular improved grades of mesoporous silica are disclosed.
Claims20
A method of capturing one or more volatile organic compounds (VOC) or semi-volatile organic compounds (SVOC) from a gaseous atmosphere, the method comprising:
- exposing a mesoporous silica sorbent of the MCM-41 type (hexagonal) to an atmosphere comprising the one or more VOC and/or one or more SVOC, thereby capturing the one or more VOC and/or one or more SVOC;
- wherein
- the mesoporous silica sorbent possesses a combination of two or more of the following physical properties:
- Property
- Linear formula
- SiO2 polymer
- Pore structure
- Hexagonal tubes
- Pore size (diameter)
- about 2 to about 30 nm
- Pore volume
- about 0.5 to about 2.0 cm3/g
- Surface area
- greater than about 600 m2/g
- Channel wall thickness
- about 1 to about 5 nm.
- and
- wherein said sorbent excludes porous polymer.
A method of capturing one or more volatile organic compounds (VOC) or semi-volatile organic compounds (SVOC) from a gaseous atmosphere, the method comprising:
- providing a mesoporous silica sorbent of the MCM-41 type (hexagonal) in one or more containers;
- and
- exposing said mesoporous silica to an atmosphere comprising the one or more VOC and/or one or more SVOC, thereby capturing the one or more VOC and/or one or more SVOC;
- wherein
- the mesoporous silica sorbent possesses a combination of two or more of the following physical properties:
- Property
- Linear formula
- SiO2 polymer
- Pore structure
- Hexagonal tubes
- Pore size (diameter)
- about 2 to about 30 nm
- Pore volume
- about 0.5 to about 2.0 cm3/g
- Surface area
- greater than about 600 m2/g
- Channel wall thickness
- about 1 to about 5 nm.
- and
- wherein said sorbent excludes porous polymer.
Dependencies are inferred from the claim text.