The invention relates to a catalyst that comprises at least the tantalum element, at least an aldolizing element and at least a mesoporous oxide matrix, with the tantalum mass being between 0.1 and 30% of the mesoporous oxide matrix mass, the mass of the at least one aldolizing element being between 0.02 and 4% of the mesoporous oxide matrix mass, and use thereof.

The invention relates to a catalyst that comprises a mesoporous oxide matrix, with said matrix comprising at least one oxide of an element X that is selected from among silicon and titanium, taken by itself or in a mixture, with said catalyst comprising at least the tantalum element and the niobium element, with the tantalum mass representing between 0.1 to 30% by weight of the mass of the mesoporous oxide matrix, the niobium mass representing between 0.02 to 6% by weight of the mass of the mesoporous oxide matrix, the content by mass of the tantalum element being greater than or equal to the content by mass of the niobium element. The invention also relates to the use of this catalyst in a method for the production of 1,3-butadiene from a feedstock that comprises at least ethanol.

The invention relates to a catalyst that comprises a mesoporous oxide matrix, with said matrix comprising at least one oxide of an element X that is selected from among silicon and titanium, taken by itself or in a mixture, with said catalyst comprising at least the tantalum element and the niobium element, with the tantalum mass representing between 0.1 to 30% by weight of the mass of the mesoporous oxide matrix, the niobium mass representing between 0.02 to 6% by weight of the mass of the mesoporous oxide matrix, the content by mass of the tantalum element being greater than or equal to the content by mass of the niobium element. The invention also relates to the use of this catalyst in a method for the production of 1,3-butadiene from a feedstock that comprises at least ethanol.

The present invention relates to a catalyst which is a composite oxide including at least one element X selected from the group consisting of elements belonging to Groups 3 to 6 of the periodic table, and at least one element Z selected from the group consisting of elements belonging to Group 14 of the periodic table, wherein the catalyst has mesopores.

The present invention relates to a catalyst which is a composite oxide including at least one element X selected from the group consisting of elements belonging to Groups 3 to 6 of the periodic table, and at least one element Z selected from the group consisting of elements belonging to Group 14 of the periodic table, wherein the catalyst has mesopores.

Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst; and a method using the system.

Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst; and a method using the system.

A catalytic material for oxidative coupling of methane includes: a catalyst with the formula A.sub.aB.sub.bC.sub.cO.sub.x, wherein: A is selected from alkaline earth metals; B and C are selected from rare earth metals, and wherein B and C are different rare earth metals; and the oxide of at least A, B, and C has basic, redox, or both basic and redox properties, and wherein the elements A, B, and C are selected to create a synergistic effect whereby the catalytic material provides an oxygen conversion of greater than or equal to 50% and a C.sub.2.sup.+ selectivity of greater than or equal to 70%, and wherein the catalyst provides the oxygen conversion and selectivity at a temperature of 797 F. (425 C.) or greater. The catalyst can be used in an oxidative coupling of methane reactor at lower feed temperatures compared to other catalysts.

A catalytic material for oxidative coupling of methane includes: a catalyst with the formula A.sub.aB.sub.bC.sub.cO.sub.x, wherein: A is selected from alkaline earth metals; B and C are selected from rare earth metals, and wherein B and C are different rare earth metals; and the oxide of at least A, B, and C has basic, redox, or both basic and redox properties, and wherein the elements A, B, and C are selected to create a synergistic effect whereby the catalytic material provides an oxygen conversion of greater than or equal to 50% and a C.sub.2.sup.+ selectivity of greater than or equal to 70%, and wherein the catalyst provides the oxygen conversion and selectivity at a temperature of 797 F. (425 C.) or greater. The catalyst can be used in an oxidative coupling of methane reactor at lower feed temperatures compared to other catalysts.

Provided are a Nb-doped nickel oxide-zirconia composite catalyst, and a method for preparing the same. An excellent methane modification reaction is performed by doping a nickel oxide site with niobium, so that alcohol may be prepared at low costs.