A composition of zirconium oxide and at least one oxide of a rare earth other than cerium is described. The zirconium oxide has a weight proportion of at least 50% and, after calcination at a temperature of 900? C. for 4 hours, the composition exhibits two populations of pores of which their respective diameters are centered. The diameter of the first pore has a value of from 20 nm to 40 nm and in the second pore has a value of from 80 nm to 200 nm. Further described is how the composition can be used for treating the exhaust gases of internal combustion engines.

The invention relates to known catalysts which contain cerium or other catalytically active components for producing chlorine by means of a catalytic gas phase oxidation of hydrogen chloride with oxygen. A catalyst material is described for producing chlorine by means of a catalytic gas phase oxidation of hydrogen chloride with oxygen, wherein the catalyst comprises at least oxide compounds of the cerium as active components and zirconium dioxide microparticles as the carrier components, and the catalyst is characterized by a particularly high yield, measured in kg.sub.Cl2/kg.sub.KA T.Math.h, based on the mass of the catalyst.

The present invention is directed to methods of enhancing the catalytic activities of 8-MR zeolites, the methods comprising treating a precursor 8-MR zeolite that has been prepared without the use of an organic structure directing agent and having an Si/Al ratio of less than 5, with high temperature steam for a period of time sufficient to extract at least a portion of the aluminum from the precursor zeolite framework to form a steam-treated zeolite having an Si/tetrahedral Al ratio of greater than 5, wherein the steam has a temperature in a range of from about 350 C. to about 850 C. The compositions produced by these methods and their use in catalytic reactions are also provided.

The invention provides a catalyst and a method for making the catalyst. The catalyst comprises a porous carbon composite impregnated with a salt. The catalyst comprises a porous carbon composite impregnated with a salt.

Catalyst compositions including a zeolite having a molar ratio of silicon to aluminum of about 10.0 to about 300.0; a Group 10-12 element and combinations thereof; a Group 15 element and combinations thereof; and optionally, a binder, wherein the catalyst composition has a molar ratio of Group 15 element to Group 10-12 element of about 0.01 to about 10.0 are disclosed. Methods of converting organic compounds to aromatics using such catalyst compositions are also disclosed.

The present disclosure provides mesoporous catalyst compounds and compositions having one or more group 13 atoms. The present disclosure further relates to processes for converting hydrocarbon feedstocks to small olefins. In one aspect, a catalyst compound includes a zeolite having a structural type selected from MFI, MSE, MTW, Theta-One (TON), Ferrierite (FER), AFI, AFS, ATO, BEA, BEC, BOG, BPH, CAN, CON, EMT, EON, EZT, FAU, GME, GON, IFR, ISV, ITN, IWR, IWW, LTL, MAZ, MEI, MOR, MOZ, OFF, OKO, OSI, SAF, SAO, SEW, SFE, SFO, SSF, SSY, and USI, or a combination thereof, the zeolite having a silicon to aluminum molar ratio (Si/Al ratio) of from about 5 to about 40. In one aspect, a catalyst composition includes the catalyst compound and one or more group 13 metal.

Provided are a carbon material for a catalyst carrier of a polymer electrolyte fuel cell, the carbon material being a porous carbon material and simultaneously satisfying (1) an intensity ratio (I.sub.750/I.sub.peak) of an intensity at 750? C. (I.sub.750) and a peak intensity in a vicinity of 690? C. (I.sub.peak) is 0.10 or less; (2) a BET specific surface area is from 400 to 1,500 m.sup.2/g; (3) an integrated pore volume V.sub.2-10 of a pore diameter of from 2 to 10 nm is from 0.4 to 1.5 mL/g; and (4) a nitrogen gas adsorption amount V.sub.macro at a relative pressure of from 0.95 to 0.99 in the nitrogen gas adsorption isotherm is from 300 to 1,200 cc(STP)/g, as well as a method of producing the same.

The present invention relates to a catalyst precursor composition comprising a first component having active sites, said first component being at least one of the surface modified clay and/or pore modified zeolite; and a second component being metal species comprising of at least one metal selected from Group VI B and at least one metal selected from VIII B and the second component is in intimate contact with the active sites of the first component. The present invention also provides a process for preparing the catalyst precursor composition. The present invention also relates to a catalyst composition and process of preparation thereof by using the catalyst precursor. More particularly, the present invention provides a catalyst composition suitable for converting hydrocarbon feeds to diesel range product.

The present invention relates to a core-shell cobalt catalyst used for a Fischer-Tropsch synthesis reaction and a method for preparing the same. More particularly, it relates to a cobalt catalyst, which has a core-shell structure including a cobalt-supported and sintered alumina particle as a core and a zeolite powder coated on the surface of the alumina particle to a thickness of 50 m or greater through mechanical alloying as a shell and is used to prepare hydrocarbons with high octane numbers through a Fischer-Tropsch synthesis reaction, and a method for preparing the same.

According to one or more embodiments, a nano-sized, mesoporous zeolite particle may include a microporous framework comprising a plurality of micropores having diameters of less than or equal to 2 nm and a BEA framework type. The nano-sized, mesoporous zeolite particle may also include a plurality of mesopores having diameters of greater than 2 nm and less than or equal to 50 nm. The zeolite particles may be integrated into hydrocracking catalysts and utilized for the cracking of heavy oils in a pretreatment process.