Bulk-metal crystalline catalysts for conversion of synthesis gas to olefins are described. Also described are method of making the catalyst. A bulk metal catalyst can include a first transition metal core surrounded by a silica-alkaline earth metal framework crystal lattice and includes at least one transition metal atoms bound to periphery of the framework crystal lattice. The two transition metals can be iron (Fe), cobalt (Co), manganese (Mn), rhodium (Rh), ruthenium (Ru) and combinations thereof.

A composite oxide including a metal element represented by the composition of general formula:

A.sub.nX.sub.y,

represents an element selected from the group consisting of Sc, Y, and a trivalent lanthanoid; X represents an element selected from the group consisting of Ca, Sr, and Ba; n is 0<n<1; y is 0<y<1; and n+y=1. Also, a metal-supported material in which cobalt particles are supported on the composite oxide.

A novel mixed oxide material is disclosed which contains molybdenum, vanadium, tellurium and niobium and the use of the molybdenum mixed oxide material as catalyst for the oxidative dehydrogenation of ethane to ethene or the oxidation of propane to acrylic acid and a process for producing the mixed oxide material.

A hydroprocessing catalyst has been developed. The catalyst is a crystalline transition metal tungstate material or metal sulfides derived therefrom, or both. The hydroprocessing using the crystalline transition metal tungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking. A data system comprising at least one processor; at least one memory storing computer-executable instructions; and at least one receiver configured to receive data of a conversion process comprising at least one reaction catalyzed by the catalyst or a metal sulfide decomposition product of the catalyst has been developed.

The present invention relates to a method for producing an olefin with a high yield for a short reaction time in a dehydration reaction of an aliphatic alcohol. The present invention provides a method for producing an olefin, including subjecting an aliphatic alcohol having 6 or more carbon atoms to a dehydration reaction in the presence of an aluminum oxide catalyst, wherein an average pore diameter of the aluminum oxide catalyst is 12.5 nm or more and 20.0 nm or less.

The embodiments herein provide a system and a method for synthesizing graphene-supported photocatalytic nanomaterials for air purification. The method includes synthesizing a ceramic substrate from a ceramic material in particulate form; depositing carbon material on the synthesized ceramic substrate; depositing one photocatalytic nanomaterial on the carbonaceous material coated ceramic substrate; transforming the phase of the ceramic substrate coated with carbonaceous photocatalytic nanomaterial in inert atmospheric condition from one phase to another phase; and activating the transformed ceramic substrate coated with carbonaceous photocatalytic nanomaterial, when exposed to photo energy source.

The present disclosure relates to a catalyst composite for conversion of methane gas, which includes Co.sub.3O.sub.4 nanoplates and ZrO.sub.2 nanoparticles adsorbed to the surface of the Co.sub.3O.sub.4 nanoplates, and is used for converting methane gas into alcohols, and a method for conversion of methane gas using the same. When using the catalyst composite, it is possible to convert methane gas into alcohols with high efficiency under a mild condition of room temperature and ambient pressure.

An exemplary embodiment of the present application provides a method for preparing butadiene, the method comprising a process of performing an oxidative dehydrogenation reaction by introducing a reactant comprising butene, oxygen, nitrogen, and steam into a reactor which is filled with a catalyst, in which during a first start-up of the oxidative dehydrogenation reaction, the oxygen is introduced into the reactor before the butene, or the oxygen is introduced into the reactor simultaneously with the butene.

A filter includes resin particles and photocatalyst particles having absorption at wavelengths of 450 nm and 750 nm in the visible absorption spectrum. The photocatalyst particles have a high photocatalytic function and are present on the surface of the resin particle. The filter is air permeable, transmits visible light, and has high deodorizing performance.

The present invention discloses a CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst for efficiently degrading atrazine by activating peroxymonosulfate, preparation method and application thereof. The CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst is prepared by three steps: the first step is acid-leaching of WTRs, using the WTRs as iron source to provide the iron ions required for the synthesis of CoFe.sub.2O.sub.4; the second step is preparing of a precursor, synthesizing CoFe.sub.2O.sub.4 by chemical co-precipitation method and uniformly loading the prepared CoFe.sub.2O.sub.4 on the WTRs; and the third step is calcining the precursor to synthesize the CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst. The catalytic performance of the CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst prepared by the present invention is evaluated using PMS as an oxidant and atrazine as a target pollutant. The CoFe.sub.2O.sub.4-WTRs can efficiently remove atrazine from the actual water, exhibiting good potential for practical application.