High heat flux catalytic radiant burner
AssigneeRegents of the University of Minnesota
InventorsLanny D. Schmidt, Christian T. Goralski, Jr.
Life of this patent
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Abstract
A high heat flux catalytic radiant burner of the present invention includes a housing with an inlet and an outlet end. A catalyst layer which has a coating disposed on a support is positioned between the two ends. The catalyst layer has a total specific surface area of 0.1 to 10 m.sup.2 /g. The support has a specific surface area of 1 m.sup.2 /g or less. The coating is a thin film of a nobel metal. A mixture of air and gas enters the housing though the inlet end and enters the catalyst layer where the gas is oxidized and releases heat such that the burner maintains operational firing rates of approximately 40 to 413 kBTU/hr ft.sup.2 and produces extremely low emissions.
Claims20
In a high heat flux catalytic radiant burner, a method for producing radiant heat comprising the steps of:
- mixing a gas with air in a mixing zone to form a premix;
- propelling said premix by using a blower to blow said premix into a housing through an inlet end of said housing so that all oxygen entering said housing enters with said premix;
- providing said premix to an upstream face of a catalyst layer having a coating formed from a thin film of a noble metal on a porous support having a specific surface area of 1 m.sup.2 /g or less, said catalyst layer having a specific surface area of 0.1 to 10 m.sup.2 /g when said coating is on said porous support;
- oxidizing said gas of said premix by said catalyst layer and said air in said premix without diffusion of air from the atmosphere through said downstream face;
- and
- producing an operational firing rate of approximately 40 to 413 kBTU/hr ft.sup.2, so that said catalyst layer reduces blockage of pores in said catalyst layer, maintains high temperatures and raises efficiency of the burner.
A high heat flux catalytic radiant burner comprising:
- a housing having an inlet end and an outlet end;
- a mixing zone for mixing air and gas to form a premix;
- a blower disposed between said mixing zone and said housing for blowing said premix into said housing so that all oxygen entering said housing enters from said inlet;
- and
- a catalyst layer disposed in said housing and having a downstream face and an upstream face, said downstream face facing said outlet end and said upstream face facing said inlet end, wherein said housing is configured and arranged for said premix to flow into said housing through said inlet end and to flow into said catalyst layer through said upstream face, said catalyst layer having a coating disposed on a porous support and a specific surface area of approximately 0.1 to 10 m.sup.2 /g when said coating is on said support, said porous support having a specific surface area of approximately 1 m.sup.2 /g or less, said coating being formed in a thin film and including a noble metal, said catalyst layer producing heat without diffusion of air from the atmosphere through the downstream face of the catalyst layer.
Dependencies are inferred from the claim text.