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US 10,093,542 B2Granted
Auto thermal reforming (ATR) catalytic structures
AssigneesSaudi Arabian Oil Company, The University of Queensland
InventorsJorge N. Beltramini, Moses O. Adebajo, Joao Carlos Diniz Da Costa, Gao Qing Lu, Thang V. Pham, Sai P. Katikaneni
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Abstract
An autothermal reforming catalytic structure for generating hydrogen gas from liquid hydrocarbons, steam and an oxygen source. The autothermal reforming catalytic structure includes a support structure and metal particles dispersed homogenously throughout the support structure.
Claims16
A method for formulating an autothermal reforming (ATR) catalytic structure consisting essentially of:
- obtaining a basic solution having a basic pH of between 10 and 12, the basic solution comprising an alkaline metal hydroxide, an alkaline metal carbonate, and water;
- obtaining an acidic solution having an acidic pH of between 4 and 6, the acidic solution comprising magnesium cations and nickel cations;
- mixing the basic solution with the acidic solution to create a sol-gel having layered double hydroxide (LDH) precursors through co-precipitation of the cations with the basic solution, the LDH precursors having layered crystal structures, the mixing comprising:
- measuring the metal oxide concentration;
- and
- mixing the basic solution with the acidic solution until the metal oxide concentration is at least 95%;
- heating the sol-gel at a decomposition temperature of 500° C. for a time period of 8 hours to form a calcined material having mixed metal oxides;
- and
- conducting a metal reducing step on the calcined material for collapsing the layered crystal structures within the LDH precursors using a gas mixture having molar hydrogen in a range of from about 5% to about 20% and nitrogen at a temperature in a range of from about 450° C. to about 600° C. to form an ATR catalytic structure, where the ATR catalytic structure has metal particles dispersed throughout.
6 more elements
A method of formulating an autothermal reforming (ATR) catalyst consisting essentially of:
- a. preparing a basic solution having a pH of between 10 and 12;
- b. preparing an acidic solution having a pH of between 4 and 6, wherein the acidic solution comprises magnesium cations and nickel cations and has a total cationic concentration of about 1.5 M;
- c. mixing the acidic solution and the basic solution together to form a sol-gel, wherein the mixing comprises:
- measuring the metal oxide concentration;
- and
- mixing the acidic solution and the basic solution until the metal oxide concentration is at least 95%;
- d. aging the sol-gel to form a formed solid;
- e. washing and filtering the formed solid with water until a generally neutral pH is reached;
- f. drying the formed solid for a predetermined period of time to form a dry solid;
- g. calcining the dry solid at a temperature of 650° C. for a time period of 8 hours to form a calcined material having mixed metal oxides;
- and
- h. reducing the metal in the calcined material by contacting the calcined material with hydrogen at a temperature in a range of from about 450° C. to about 600° C. to form the ATR catalytic structure, the ATR catalytic structure having metal particles dispersed throughout.
9 more elements
Dependencies are inferred from the claim text.