A honeycomb-structured catalyst for decomposing an organic substance, which includes a catalyst particle. The catalyst particle contains a perovskite-type composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, where the A contains at least of Ba and Sr, the B contains Zr, the M is at least one of Mn, Co, Ni, and Fe, y+z=1, 1.001≤x≤1.05, 0.05≤z≤0.2, and w is a positive value that satisfies electrical neutrality. The toluene decomposition rate is greater than 90% when toluene is decomposed using the honeycomb-structured catalyst subjected to a heat treatment at 1200° C. for 48 hours and a gas that contains 50 ppm toluene, 80% nitrogen, and 20% oxygen as a volume concentration as a target at a space velocity of 30,000/h and a catalyst temperature of 400° C.

The present invention concerns a material with a non-stoichiometric spinel-type crystalline structure based on cobalt oxide doped with alkaline elements, its production process for obtaining it by precipitation with controlled washing, and its particular use as a highly active catalyst in the N.sub.2O decomposition reaction. Therefore, we understand that the present invention is in the area of green industry aimed at reducing N.sub.2O emissions into the atmosphere.

The present disclosure provides a preparation method of a monometallic or bimetallic nanoparticle-supported catalyst. The synthesis of metal nanoparticles with different shapes, sizes, and atomic structures is affected by nucleation and growth rates. In the present disclosure, by changing a ratio of strong and weak reducing agents, a suitable double reducing agent is provided for metal nanoparticles with different reduction potentials, where the strong reducing agent is used for rapid nucleation and the weak reducing agent is used for the growth of metal nanoparticles. Accordingly, modulation and control of the nucleation and growth rates can be realized during the synthesis of nanoparticles. In addition, through multiple actions of a combination of reducing agents with different reduction intensities, monometallic/bimetallic nanoparticles of different sizes, shapes, and atomic structures are controllably prepared, which are then supported with a carrier to obtain the monometallic or bimetallic nanoparticle-supported catalyst.

A preparation method of Cu—Pd—CeO.sub.2/γ-Al.sub.2O.sub.3@NP catalyst and a synthesis method of benzopyrazine compounds. The preparation method of the Cu—Pd—CeO.sub.2/γ-Al.sub.2O.sub.3@NP catalyst comprises the following steps: (1) preparing a CeO.sub.2/γ-Al.sub.2O.sub.3 carrier; (2) preparing a CeO.sub.2/γ-Al.sub.2O.sub.3@NP carrier; (3) preparing the Cu—Pd—CeO.sub.2/γ-Al.sub.2O.sub.3@NP catalyst by impregnation method. A one-pot method for synthesizing benzopyrazine compounds of formula (III) includes using an o-nitroaniline compound of formula (I) and an aliphatic diol compound of formula (II) as raw materials, carrying out the one-pot synthesis of the benzopyrazine compound of formula (III) under solvent-free condition and under the combined action of the Cu—Pd—CeO.sub.2/γ-Al.sub.2O.sub.3@NP catalyst prepared by the method and an alkali. The Cu—Pd—CeO.sub.2/γ-Al.sub.2O.sub.3@NP catalyst increases the number of basic sites by doping N and P, and meanwhile loads CeO.sub.2 to assist in the extraction of protons, thereby improving the dehydrogenation activity and product selectivity.

The present invention discloses a synthesis method of lactide by confinement effect catalysis of crystalline porous polymer material, wherein the method comprising: (I) synthesis of catalyst; (II) synthesis of lactide by confinement effect catalysis; and (III) purification of lactide. In the present invention, a yield of L-lactide by catalysis of L-lactic acid by crystalline polymers is as high as 85.6%, which is 10% higher than the yield of lactide by H-β molecular sieve reported in documents currently available; it is easy to prepare the crystalline porous polymer material catalyst, which is environmental friendly, has a high yield and is recyclable, for consecutive 7 times the catalysis yield is maintained to be higher than 70%, and catalysis yield conservation rate is far higher than catalysis effects of catalysts reported in documents currently available.

A process for preparing a silver-containing catalyst for the oxidation of ethylene to ethylene oxide (EO) including the steps of: providing a support having pores; providing a silver-containing impregnation solution; adding an amount of surfactant to the impregnation solution; contacting the support with the surfactant-containing impregnation solution; and removing at least a portion of the impregnation solution prior to fixing the silver upon the carrier in a manner which preferentially removes impregnation solution not contained in the pores. The use of the surfactant results in improved drainage of the silver impregnation solution from the carrier exteriors during the catalyst synthesis. As a result, the amount of silver-containing impregnation solution necessary for the synthesis of the EO catalyst was reduced by up to 15% without reducing the catalyst performance.

Provided is halloysite powder including a granule in which halloysite including halloysite nanotubes and titanium oxide are aggregated. The granule includes a first pore derived from a tube hole of the halloysite nanotubes, and a second pore different from the first pore.

A catalyst is provided having: (a) at least one multimetallic salt; and (b) at least one organic acid, wherein the at least one multimetallic salt to the at least one organic acid weight ratio is in the range of 1:0.01-1:0.5. A process is also provided for the preparation of the catalyst and for the preparation of the multimetallic salt.

Modified red mud catalyst compositions, methods for production, and methods for use, a composition including red mud material produced from an alumina extraction process from bauxite ore; nickel oxide, the nickel oxide present at between about 5 wt. % to about 40 wt. % of the modified red mud catalyst composition; and a Periodic Table Group VIB metal oxide, the Group VIB metal oxide present at between about 1 wt. % and about 30 wt. % of the modified red mud catalyst composition.

A method for ammonia decomposition to produce hydrogen, the method comprising the steps of introducing an ammonia stream to a reactor, wherein the ammonia stream comprises ammonia, wherein the reactor comprises a cobalt-based catalyst, the cobalt-based catalyst comprising 15 wt % and 70 wt % of cobalt, 5 wt % and 45 wt % of cerium, and 0.4 wt % and 0.5 wt % barium, wherein a remainder of weight of the cobalt-based catalyst is oxygen; contacting the ammonia in the ammonia stream with the cobalt-based catalyst, wherein the cobalt-based catalyst is operable to catalyze an ammonia decomposition reaction; catalyzing the ammonia decomposition reaction to cause the ammonia decomposition in the presence of the cobalt-based catalyst to produce hydrogen; and withdrawing a product stream from the reactor, the product stream comprising hydrogen.