The present invention provides a catalyst for catalytic reduction of an industrial flue gas SO.sub.2 with CO to prepare sulfur, a method for preparing the same and use thereof. A CeO.sub.2 nanocarrier is prepared by using a hydrothermal method, La and Y are loaded as active components, pre-sulfurization is conducted with 6% of SO.sub.2 and 3% of CO, and finally, the catalyst is prepared. The catalyst has high reactivity and sulfur selectivity and strong stability. The by-product sulfur generated by the reaction is recovered with a solvent CS.sub.2, and the solvent CS.sub.2 is recovered by using a distillation process. The preparation method is low in cost, causes no secondary pollution and is high in sulfur recovery rate. The problem of low sulfur production in China at present is solved.

The present invention relates to: oxygen carrier particles having a metal oxide-perovskite core-shell structure; and a chemical-looping thermochemical water/carbon dioxide splitting process using the same. By using the oxygen carrier particles having a metal oxide-perovskite core-shell structure in the chemical-looping thermochemical water/carbon dioxide splitting process, it is possible to produce hydrogen/carbon monoxide from water/carbon dioxide in high yield by efficiently overcoming the disadvantages of conventionally used oxygen carrier particles.

This invention relates to a catalyst for use in the preparation of acetic acid through a methanol carbonylation reaction using carbon monoxide, and particularly to a heterogeneous catalyst represented by Rh/C.sub.3N.sub.4 configured such that a complex of a rhodium compound and 3-benzoylpyridine is immobilized on a carbon nitride support.

The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA) comprising at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active material of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %. The present invention further relates to a process for gas phase oxidation in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active materials of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %.

Some embodiments are directed to a new methodology aimed at preparing highly N-doped mesoporous carbon macroscopic composites, and their use as highly efficient heterogeneous metal-free catalysts in a number of industrially relevant catalytic transformations.

The present invention relates to a hybrid nanostructured photocatalyst, comprising a first nanoparticle comprising silver halide (AgX); a second nanoparticle, which is formed on an outer surface of the first nanoparticle and comprises Ag; and a polymer formed on any one outer surface of the first nanoparticle and the second nanoparticle, and a preparation method thereof. Specifically, the present invention provides a hybrid nanostructured photocatalyst having a high photocatalytic activity in a visible light region and a preparation method thereof.

The invention relates to a catalyst which comprises: a) a mixed metal oxide of molybdenum, vanadium, niobium and optionally tellurium; and b) ceria particles having a crystallite size greater than 15 nanometers (nm); wherein the amount of the ceria particles, based on the total amount of the catalyst, is of from 1 to 60 wt. %. Further, the invention relates to a process for preparing a catalyst, which comprises mixing a mixed metal oxide of molybdenum, vanadium, niobium and optionally tellurium with ceria particles having a crystallite size greater than 15 nanometers (nm), wherein the amount of the ceria particles, based on the total amount of the catalyst, is of from 1 to 60 wt. %. Still further, the invention relates to an alkane oxidative dehydrogenation and/or alkene oxidation process wherein such catalyst is used.

An oxidation catalyst composition is provided, the composition including a plurality of platinum group metal particles having a multi-modal distribution of particle sizes. The plurality of platinum group metal particles includes a first population of platinum group metal particles having a range of particle sizes of from about 0.5 nm to about 3 nm, and a second population of platinum group metal particles having a range of particle sizes of from about 4 nm to about 15 nm. Methods for the preparation and use of the catalyst composition are also provided, as well as catalyst articles and emission gas treatment systems employing such catalyst articles. The catalyst exhibits enhanced stability with respect to oxidation performance after degreening and/or aging, as compared to conventional oxidation catalysts, in particular less loss of NOx oxidation performance.

organic frameworks that include catalytic components incorporated throughout the framework. These covalent organic frameworks have unique structural and physical properties, which lend these frameworks to be versatile and useful in a number of different applications and uses and chemical reactions. In one, the covalent organic frameworks include a plurality of fused aromatic groups or polyaromatic groups and ligands, where catalytic components such as transition metal catalysts are coordinated by the ligand to the frameworks.

The present invention relates to a catalyst to be applied to the process of gasification of coke or coal, individually or in mixture, and to the process of preparing said catalyst, which is useful in obtaining higher levels of hydrogen and carbon monoxide, which allows the conversion of coke into by-products of higher added value (hydrogen-rich syngas). The present invention also addresses to a process for converting petroleum coke by using a catalyst according to the present invention.