A fluidized bed reactor, a device, and a method for producing low-carbon olefins from oxygen-containing compound are provided. The fluidized bed reactor includes a reactor shell, a reaction zone, a coke control zone and a delivery pipe, where there are n baffles arranged in the coke control zone, and the n baffles divide the coke control zone into n sub-coke control zones which include a first sub-coke control zone, a second sub-coke control zone, and an nth sub-coke control zone; at least one catalyst circulation hole is provided on each of the n-1 baffles, so that the catalyst flows in an annular shape in the coke control zone, where n is an integer. The device and method can be adapted to a new generation of DMTO catalyst, and the unit consumption of production ranges from 2.50 to 2.58 tons of methanol/ton of low-carbon olefins.

The disclosure discloses a catalyst capable of simultaneously removing COS and H.sub.2S in garbage gasification and a preparation method thereof, and belongs to the technical field of preparation of desulfurization catalysts. The method includes the following steps: pretreating an SBA-15 molecular sieve with a templating agent unremoved, which primarily includes the steps of removing the templating agent and introducing halogen atoms to modify the molecular sieve; then synthesizing an active component solution; and finally introducing active components into channels of the pretreated molecular sieve via surface tension by adopting an impregnation method, performing washing and drying, and performing calcining under an N.sub.2 atmosphere, so as to obtain the catalyst. An H.sub.2S and COS removal experiment is performed on the catalyst prepared according to the present disclosure under a simulated garbage gasification atmosphere, and a desulfurization experiment is performed as a control, so as to evaluate the desulfurization efficiency. The catalyst prepared according to the present disclosure can load the active components in fixed positions inside and outside the channels, and the components are easy to obtain, thereby having the advantages of low cost and good desulfurization effects.

The present invention relates to a molding comprising a zeolitic material having framework type MWW, wherein the framework structure comprises Ti, Si, and O, wherein the zeolitic material further comprises Zn and an alkaline earth metal M, the molding further comprising a binder, wherein the molding exhibits a specific Lewis acidity. Further, the present invention relates to the method of preparation of said molding and the use thereof.

The disclosure discloses a catalyst capable of simultaneously removing COS and H.sub.2S in garbage gasification and a preparation method thereof, and belongs to the technical field of preparation of desulfurization catalysts. The method includes the following steps: pretreating an SBA-15 molecular sieve with a templating agent unremoved, which primarily includes the steps of removing the templating agent and introducing halogen atoms to modify the molecular sieve; then synthesizing an active component solution; and finally introducing active components into channels of the pretreated molecular sieve via surface tension by adopting an impregnation method, performing washing and drying, and performing calcining under an N.sub.2 atmosphere, so as to obtain the catalyst. The catalyst prepared according to the present disclosure can load the active components in fixed positions inside and outside the channels, and the components are easy to obtain, thereby having the advantages of low cost and good desulfurization effects.

Provided is a method for producing bio-aromatic compounds from glycerol. The method uses a primary alcohol, secondary alcohol or a combination thereof as a mixing medium in converting glycerol into an aromatic compound, and thus overcomes the high viscosity of glycerol and improves the problem of rapid catalytic deactivation, thereby increasing the yield of aromatic compounds and improving the stability of catalyst. In addition, the method for producing bio-aromatic compounds uses a zeolite-based catalyst that is a kind of solid acid catalysts, and suggests optimum reaction conditions, and thus imparts a high added value to glycerol produced as a byproduct in a biodiesel production process and increases the cost-efficiency of process.

Disclosed are a phosphorus-containing high-silica molecular sieve, its preparation and application thereof, wherein the molecular sieve comprises about 86.5-99.8 wt % of silicon, about 0.1-13.5 wt % of aluminum and about 0.01-6 wt % of phosphorus, calculated as oxides and based on the dry weight of the molecular sieve, the molecular sieve has an XRD pattern with at least three diffraction peaks, the first strong peak is present at a diffraction angle of about 5.9-6.9°, the second strong peak is present at a diffraction angle of about 10.0-11.0°, and the third strong peak is present at a diffraction angle of about 15.6-16.7°. The phosphorus-containing high-silica molecular sieve shows an improved hydrocracking activity in the presence of nitrogen-containing species when used in the preparation of hydrocracking catalysts.

A millimeter-scale peroxymonosulfate activator ZSM-5-(C@Fe) and a preparation method and an application thereof are provided. According to the method, a PMS activator ZSM-5-(C@Fe) with a millimeter-scale stable structure is synthesized in the following steps: (1) preprocessing a ZSM-5 by a carboxylation method to obtain a ZSM-5-COOH; (2) synthesizing a ferrous metal organic framework material by a thermal method to obtain a precursor Fe (II)-MOF-74; (3) dispersing the ZSM-5-COOH in the step (1) and an ethyldiol methacrylate in an acetonitrile, and mixing evenly to obtain a mixed solution; and adding the precursor Fe(II)-MOF-74 in the step (2) into the mixed solution, carrying out a stirring reaction under an action of an initiator, filtering to obtain a precipitate, washing, and drying in vacuum to obtain ZSM-5-MOFs; and (4) in a nitrogen atmosphere, heating the ZSM-5-MOFs in the step (3) to carry out high-temperature pyrolysis to obtain the millimeter-scale peroxymonosulfate activator ZSM-5-(C@Fe).

A method for modifying the surface of a molecular sieve, comprising reacting a molecular sieve with an aminosilane, wherein the reaction is carried out in an aqueous solvent. A modified molecular sieve obtained by the method is also described.

A multi-functional composite catalyst includes a catalyst support material, a preformed catalyst material at least partially secured in the catalyst support, and at least one catalytically active compound supported by the catalyst support, the preformed catalyst material, or both. The catalyst support material may include fumed silica, alumina, fumed alumina, fumed titania, or combinations of these. A catalytic activity of the catalytically active compound may be different than a catalytic activity of the preformed catalyst material. The composite catalyst may be catalyst for producing propene from 2-butene and may include a zeolite as the preformed catalyst material and a metal oxide, such as tungsten oxide, as the catalytically active material. A method of making the composite catalyst may include aerosolizing a catalyst precursor mixture that includes a preformed catalyst material, catalyst support precursor, and catalytically active compound precursor, and drying the aerosolized catalyst precursor mixture.

Disclosed is an in-situ preparation method for a catalyst for Reaction I: methanol and/or dimethyl ether with toluene are used to prepare light olefins and co-produce para-xylene and/or Reaction II: methanol and/or dimethyl ether with benzene are used to prepare at least one of toluene, para-xylene and light olefins, comprising: contacting at least one of a phosphorus reagent, a silylation reagent and water vapor with a molecular sieve in a reactor to prepare, in situ, the catalyst for the Reaction I and/or the Reaction II, wherein the reactor is a reactor of the Reaction I and/or the Reaction II. By directly preparing a catalyst in a reaction system, the entire chemical production process is simplified, the catalyst preparation and transfer steps are saved, and the operation thereof is easy. The catalyst prepared in situ can be directly used for in situ reactions.