Nickel catalyst for dry and low temperature steam reforming of methane
AssigneeQatar University
InventorsMohammed J. Al-Marri, Mohammed Ali H. Salah Saad, Mahmoud M. Khader, Sardar Ali, Ahmed Gamal Abdelmoneim
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Abstract
This invention relates to a novel nickel catalyst and a novel one-pot solution combustion synthesis of that catalyst for the CO2 reforming and low temperature steam reformation of methane. The novel nickel catalyst has exceptional activity for dry reforming and steam reforming of methane, and exhibits excellent resilience to deactivation due to carbon formation.
Claims45
A catalyst composition comprising:
- a nickel species, and
- alumina,
- wherein
- the catalyst is in form of nanoparticulate,
- the nickel species comprises NiAl2O4 with Ni, NiO, or combination of Ni and NiO;
- wherein NiAl2O4 is the main form of the nickel species;
- the nickel species is dispersed on the surface and in the bulk of the alumina, wherein the nickel species has a higher concentration on the surface of the alumina than in the bulk of the alumina.
A method of making a catalyst composition by solution combustion synthesis (SCS), comprising:
- dissolving a water-soluble nickel salt, a water-soluble aluminum salt, and a water-soluble reductant in deionized water to form a solution;
- heating the solution until auto-thermal combustion is initiated;
- allowing auto-thermal combustion to proceed to completion to provide a powder product;
- and
- calcining the powder product in air at about 800° C. for about three hours at a heating and cooling rate of about 1° C./min and about 1° C./min respectively.
A nickel catalyst for CO2 reformation and steam reformation of methane, comprising:
- a nanoparticulate nickel species;
- and
- a non-hierarchical alumina support;
- wherein the catalyst for steam reforming of methane is characterized by:
- initiation of steam reformation of methane at approximately 350° C.;
- complete steam reformation of methane to hydrogen, carbon monoxide and carbon dioxide at approximately 650° C.;
- essentially 100% reformation of methane in the presence of a slight excess of steam over a calculated stoichiometric quantity;
- stability during methane steam reforming up to at least 650° C.
- consistent catalytic activity for methane steam reforming to at least 650° C.;
- and
- resistance to coking during methane steam reforming to at least 650° C.
Dependencies are inferred from the claim text.