The present disclosure generally relates to a denitration catalyst, and in particular to a method for preparing the denitration catalyst. The present disclosure also relates to a method for preparing a coated substrate comprising the denitration catalyst. The present invention also relates to use of the denitration catalyst and/or coated substrate at low temperatures and/or humid environments.

The present disclosure generally relates to a denitration catalyst, and in particular to a method for preparing the denitration catalyst. The present disclosure also relates to a method for preparing a coated substrate comprising the denitration catalyst. The present invention also relates to use of the denitration catalyst and/or coated substrate at low temperatures and/or humid environments.

A method of generating hydrogen includes reacting sodium borohydride with water in the presence of a Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3/g-C.sub.3N.sub.4 nanocomposite to hydrolyze sodium borohydride and generate hydrogen. The nanocomposite used is fabricated by mixing CaSiO.sub.3, g-C.sub.3N.sub.4, and a copper salt in a glycol solvent to form a mixture and further microwaving the mixture to obtain the Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3/g-C.sub.3N.sub.4 nanocomposite.

A method of generating hydrogen includes reacting sodium borohydride with water in the presence of a Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3/g-C.sub.3N.sub.4 nanocomposite to hydrolyze sodium borohydride and generate hydrogen. The nanocomposite used is fabricated by mixing CaSiO.sub.3, g-C.sub.3N.sub.4, and a copper salt in a glycol solvent to form a mixture and further microwaving the mixture to obtain the Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3/g-C.sub.3N.sub.4 nanocomposite.

A spray pyrolysis system and method are described for manufacture of mixed metal oxide compositions, e.g., mixed metal oxide catalyst compositions having utility for gas processing applications such as hydrogenation, dehydrogenation, reduction, and oxidation. Mixed metal oxide automotive exhaust catalyst compositions produced by such system and method achieve a substantial reduction in temperatures required for removal of automotive exhaust pollutant species, as compared to catalyst produced by conventional batch precipitation techniques. The spray pyrolysis system and method enable catalytic metal(s) to be integrally incorporated in the mixed metal oxide composition, thereby obviating a separate catalytic metal impregnation operation.

A spray pyrolysis system and method are described for manufacture of mixed metal oxide compositions, e.g., mixed metal oxide catalyst compositions having utility for gas processing applications such as hydrogenation, dehydrogenation, reduction, and oxidation. Mixed metal oxide automotive exhaust catalyst compositions produced by such system and method achieve a substantial reduction in temperatures required for removal of automotive exhaust pollutant species, as compared to catalyst produced by conventional batch precipitation techniques. The spray pyrolysis system and method enable catalytic metal(s) to be integrally incorporated in the mixed metal oxide composition, thereby obviating a separate catalytic metal impregnation operation.

The present invention addresses to a method of preparing steam reforming catalysts, of the eggshell type, using a solution of glycerin, in polar solvent, preferably water, to occupy the pores of a support. Next, the solvent is removed and the support is impregnated with a nickel salt solution, which may contain promoters such as rare earths. The steps can be repeated until the desired content of the active phase and promoters is reached.

The present invention addresses to a method of preparing steam reforming catalysts, of the eggshell type, using a solution of glycerin, in polar solvent, preferably water, to occupy the pores of a support. Next, the solvent is removed and the support is impregnated with a nickel salt solution, which may contain promoters such as rare earths. The steps can be repeated until the desired content of the active phase and promoters is reached.

A method of absorption includes contacting a copper hydroxide nitrate/calcium silicate/graphite-phase carbon nitride [Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3@g-C.sub.3N.sub.4] nanocomposite catalyst with a solution including one or more pollutants. Further, the method includes absorbing the one or more pollutants on the Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3@g-C.sub.3N.sub.4 nanocomposite catalyst.

A method of absorption includes contacting a copper hydroxide nitrate/calcium silicate/graphite-phase carbon nitride [Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3@g-C.sub.3N.sub.4] nanocomposite catalyst with a solution including one or more pollutants. Further, the method includes absorbing the one or more pollutants on the Cu.sub.2(OH).sub.3NO.sub.3/CaSiO.sub.3@g-C.sub.3N.sub.4 nanocomposite catalyst.