“On-site” carbon dioxide generator
US7785450B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2007 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Jul 2, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B9/70
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Systems are described for the “on-site” production of substantial amounts of carbon dioxide and hydrogen. The systems include a stack of multiple electrochemical cells, which decompose organic carboxylated compounds into CO2 and H2 without leaving any residue. From a bench-top small generator, producing about 1 lb of CO2 per day to a large-scale generator producing 1 ton of CO2 per day, the process is essentially identical.Oxalic acid, either anhydrous or in its dihydrate form, is used to efficiently generate the gases. The energy required is less than 0.3 Kilowatt-hours per lb of CO2 generated. Individual cells operate at less than 1.2 volts at current densities in excess of 0.75 amps/cm2. CO2 production rates can be controlled either through voltage or current regulation. Metering is not required since the current sets the gas production rate. These systems can competitively replace conventional compressed CO2 gas cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.