Catalyst and process for thermo-neutral reforming of liquid hydrocarbons
AssigneesPetroleo Brasileiro S.A., King Fahd University of Petroleum and Minerals, Saudi Arabian Oil Company
InventorsFahad Ibrahim AL-MUHAISH, Shakeel AHMED, Roberto Carlos Pontes BITTENCOURT, Mauri Jose Baldini CARDOSO, Vivian Passos DE SOUZA
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Abstract
The invention relates to a four-component catalyst and a seven-component catalyst and refractory supports for use in the thermoneutral reforming of petroleum-based liquid hydrocarbon fuels.
Claims33
A thermo-neutral reforming process for the production of a hydrogen-rich synthesis gas from a liquid hydrocarbon fuel, which comprises:
- a. providing a mixture of a liquid hydrocarbon fuel, an O2 gas and steam to an interior zone of a reactor, said interior zone including a catalyst bed consisting of a combined combustion and steam and/or O2 reforming catalyst containing Ni, La2O3, Ce2O3, Pt, ZrO2, Rh and Re supported on magnesium aluminate;
- b. pre-heating the fuel, the O2 gas and steam mixture to a temperature in the range of about 350° C.;
- and,
- c. heating the mixture to about 410° C. and bringing, it into contact with the catalyst bed at a gas hour space velocity of about 30,000 h−1 to about 70,000 h−1 causing an exothermic combustion reaction raising the reaction temperature to about 800° C. to about 820° C., and also causing an endothermic steam reforming reaction for a period of time sufficient to reform the liquid fuel to yield a hydrogen-rich synthesis gas.
A thermo -neutral reforming process for the production of a hydrogen-rich synthesis gas from liquid hydrocarbon fuels, which comprises:
- a. providing a mixture of a liquid hydrocarbon fuel, an O2 gas and steam to an interior zone of a reactor, said interior zone including a catalyst bed consisting of a Ni—Ce2O3—Pt—Rh combined combustion and steam and/or CO2 reforming catalyst supported on magnesium aluminate and containing a potassium compound as a promoter;
- b. pre-heating the mixture to a temperature of about 350° C.;
- and
- c. heating the mixture to about 410° C. and bringing it into contact with the catalyst bed at a gas hour space velocity of about 30,000 h−1 to about 70,000 h−1 causing an exothermic combustion reaction raising the reaction temperature to about 800° C. to about 820° C. and also causing an endothermic steam reforming reaction for a period of time sufficient to reform the liquid fuel to yield a hydrogen-rich synthesis gas.
A process for preparing a Ni—Ce2O3—LaO3Pt—ZrO2—Rh—Re catalyst supported on magnesium aluminate for use in a thermo-neutral reforming process, which comprises steps of:
- impregnating a magnesium aluminate support with an aqueous solution containing rhodium nitrate and rhenium oxide, followed by drying in an NH3-rich atmosphere, calcination and hydrogen reduction to obtain a rhodium-rhenium/magnesium aluminate support;
- b. impregnating the rhodium-rhenium/magnesium aluminate support with an aqueous solution of zirconium oxynitrate hydrate and tetraminoplantino chloride followed by drying in an NH3-rich atmosphere, calcination and hydrogen reduction to obtain a Pt—ZrO2—Rh—Re/magnesium aluminate support;
- c. impregnating the Pt—ZrO2—Rh—Re:/magnesium aluminate support with an aqueous solution of lanthanum nitrate hexahydrate, cerium (iii) nitrate and nickel nitrate hexahydrate followed by drying in an NH3-rich atmosphere, calcination and reduction at 730° C.
A process for preparing a Ni—Ce2O3—LaO3 catalyst supported on magnesium aluminate and promoted by potassium for use in a thermo-neutral reforming process, which comprises;
- a. impregnating a magnesium aluminate support with an aqueous solution of potassium hydroxide followed by drying and calcining;
- b. impregnating the potassium hydroxide impregnated support with tetraaminoplatinate chloride (II) monohydrate, lanthanum nitrate hexahydrate, cerium nitrate and nickel nitrate hexahydrate followed by drying, calcination and hydrogen reduction.
A catalyst which comprises 0.2% Rh w/w, 0.3% R Re w/w, 0.8% Pt w/w, 1.0% ZrO2 w/w, 1.0% La2O3 w/w, 6% Ni w/w and supported on a single refractory support, 3% Ce2O3 of magnesium aluminate for use in a thermoneutral reforming process.
A catalyst which comprises 1% Pt w/w, 1% La2O3 w/w, 6% Ni w/w, 3% Ce2O3 and 2.7% K2O w/w supported on a single refractory support of magnesium aluminate for use in a thermoneutral reforming process.
Dependencies are inferred from the claim text.