Liquid phase reforming of oxygenates for hydrogen production
AssigneeGti Energy
InventorsJames Seaba, Osman Akpolat
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Abstract
In the liquid phase reforming (LPR) of oxygenated C,H-containing compounds such as alcohols, various strategies are disclosed for managing byproduct CO2. Important processing options include those in which electrolyte, consumed in capturing or precipitating the CO2 generated from LPR, is regenerated or not regenerated, with carbon emissions potentially being avoided in the latter case. With regeneration, different chemistries are possible, such as in the case of a regeneration cycle utilizing hydroxide anions to precipitate a solid, carbonate form of CO2 that is generated from reforming. Alternatively, a reaction and regeneration system may use carbonate anions to “capture” CO2 and thereby maintain it as aqueous, solubilized bicarbonate form.
Claims18
A process for reforming an oxygenated C,H-containing compound, the process comprising:
- contacting the oxygenated C,H-containing compound with a catalyst in an aqueous solution, said aqueous solution comprising at least one CO2-precipitating cation,
- wherein said oxygenated C,H-containing compound is reformed by reaction with H2O in said aqueous solution, to produce H2 and a precipitated carbonate form of generated CO2 and the CO2-precipitating cation,
- the process further comprising adding, to a post-reforming reactor or post-reforming zone, positioned downstream of a respective reforming reactor or reforming zone in which at least about 90 wt-% of said oxygenated C,H-containing compound is reformed, a further amount of said at least one CO2-precipitating cation.
A process for reforming an oxygenated C,H-containing compound, the process comprising:
- contacting, in a reforming reactor or reforming zone, the oxygenated C,H-containing compound with a catalyst in an aqueous solution, said aqueous solution comprising at least one CO2-precipitating cation and/or at least one CO2-capturing cation,
- wherein said oxygenated C,H-containing compound is reformed by reaction with H2O in said aqueous solution, to produce H2 and (i) a precipitated carbonate form of generated CO2 and the CO2-precipitating cation and/or (ii) a captured bicarbonate form of generated CO2 and the CO2-capturing cation,
- the process further comprising:
- modifying, in a post-reforming reactor or post-reforming zone, downstream of said reforming reactor or reforming zone, a condition of said aqueous solution to change solubility of (i) said precipitated carbonate form of generated CO2 and/or (ii) said captured bicarbonate form of generated CO2.
Dependencies are inferred from the claim text.