Beijing Huashi United Energy Technology and Development Co., Ltd.

Other

Fuzhou University National Engineering Center of Chemical Fertilizer Catalyst

Beijin Huashi United Energy Technology and Development

Lilong Jiang

Ke Lin

Lin Li

Lixin Guo

Yongjun Cui

Shengbao He

Yanning Cao

Yu Luo

Jun Ni

Jianxin Lin

Bingyu Lin

Xingyi Lin

Chongqi Chen

Disclosed is a ruthenium-based catalyst for ammonia synthesis, preparation method and use thereof. The ruthenium-based catalyst comprises Ru&#x2014;Ba-A core-shell structure which comprises a ruthenium nanoparticle as a core covered with a first shell and a second shell sequentially, wherein the first shell consists of a barium nanoparticle, and the second shell consists of a metal oxide. The Ru&#x2014;Ba-A core-shell structure can effectively preventing agglomerations of ruthenium nanoparticles during the use of the catalyst and avoiding direct contact between the ruthenium nanoparticles and the metal oxides. In addition, barium nanoparticles have a promoting effect as an electronic promoter, which can effectively improve the stability and catalytic activity of ruthenium-based catalyst for ammonia synthesis, especially in the system for synthesizing ammonia from a coal gas.

Ruthenium-based catalyst for ammonia synthesis and preparation method and use thereof

Disclosed is a ruthenium-based catalyst for hydrogen production from ammonia decomposition, comprising an active component, a promoter and a carrier, wherein the active component is ruthenium, the promoter is cesium and/or potassium, and the carrier comprises magnesium oxide, an activated carbon, cerium oxide, molybdenum oxide, tungsten oxide, barium oxide and potassium oxide. The present invention further discloses a preparation method and application of the aforementioned ruthenium-based catalyst for hydrogen production from ammonia decomposition. Compared with the prior art, the ruthenium-based catalyst for hydrogen production from ammonia decomposition provided by the present invention is low in preparation cost and simple in process, and has high catalytic activity at low temperature and good heat resistance.

Ruthenium-based catalyst for hydrogen production from ammonia decomposition, preparation method therefor and application thereof

The present invention provides a composition for biomass oil, and a preparation method and use thereof. The composition comprises a biomass and a liquid oil, wherein, based on weight of the biomass, the biomass has a moisture content of 3 wt % to 18 wt %. The biomass is mixed with the liquid oil to obtain a liquid mixture, i.e., the composition for biomass oil. According to the use of the composition for biomass oil in preparation of biomass oil, high-pressure high-temperature hydrolysis is carried out by using water in the biomass, and the polycondensation of coke is avoided under the co-action of hydrogen gas and a catalyst, so that the yield of the coke is lowered, and the yield of the biomass oil is increased.

Composition for biomass oil, and preparation method and use thereof

The present invention provides a catalyst carrier with shift and adsorption purification performance, comprising modified bauxite in the raw material components which fluxing and pore forming effects. Most iron oxide contained in the bauxite is removed after modification, so that there are a large amount of highly active aluminosilicate compounds in the modified bauxite. When preparing the catalyst, the aluminosilicate compound serves as a low melting point flux and can significantly increase the migration rate of magnesium and aluminum ions during the calcinating process and promote the generation of MgAlOat low temperatures, thereby the catalyst carrier of the present invention has strong anti-hydration capacity and mechanical strength. In addition, when the modified bauxite is used as macroporous hard template for the preparation of the catalyst, macro pores can be formed in the structure of the catalyst carrier after calcinating treatment, so that the catalyst carrier of the present invention has strong adsorption purification ability on macromolecular particles including oil pollution and dust.

CO shift catalyst carrier, catalyst based on the catalyst carrier and preparation process thereof

The present invention relates to the field of biological energy, in particular to a biomass liquefaction process and fuel oil and chemical raw materials prepared by the same. The biomass liquefaction process comprises the following steps: preparing a slurry comprising a first catalyst and a biomass; performing a first hydrogenation reaction by introducing hydrogen to the slurry to obtain a first stage hydrogenation product; performing a second hydrogenation reaction by adding a second catalyst and introducing hydrogen into the first stage hydrogenation product to obtain a second stage hydrogenation product; and subjecting the second stage hydrogenation product to separation operation to obtain a fuel oil and chemical raw material; wherein the first hydrogenation reaction is controlled to have a reaction pressure of 13-25 MPa and a reaction temperature of 200-350&#xb0; C., and the second hydrogenation reaction is controlled to have a reaction pressure of 13-25 MPa and a reaction temperature of 380-480&#xb0; C. The present invention provides a biomass liquefaction process with high reaction efficiency and high liquid yield without coke generation.

Biomass liquefaction process, and fuel oils and chemical materials prepared by the same

A one-pot liquefaction process for biomass is presented. The one-pot liquefaction process for biomass comprises the following steps: preparing a slurry containing a catalyst, a vulcanizing agent and a biomass, and introducing hydrogen into the slurry to carry out a reaction, thereby obtaining a bio-oil wherein the reaction is controlled to be carried out under a pressure of 13-25 MPa and a temperature of 300-500&#xb0; C.; and the catalyst comprises amorphous alumina or biomass charcoal loading an active component, and the active component comprises one or more selected from oxides of metals of group VIB, group VIIB or group VIII in the periodic table of elements. The process provided by the present invention has high reaction efficiency, no coke formation and high liquid yield.

One-pot liquefaction process for biomass

The present invention discloses a method for direct liquefaction of biomass. The method comprises the following steps: (1) mixing a biomass, a hydrogenation catalyst and a hydrogen-donor solvent to prepare a biomass slurry; (2) carrying out a first liquefaction reaction with the biomass slurry and hydrogen gas to obtain a first reaction product; (3) carrying out a second liquefaction reaction with the first reaction product and hydrogen gas to obtain a second reaction product; (4) subjecting the second reaction product to a first gas-liquid separation at a temperature of 290-460 DEG C. to produce a first liquid phase and a first gas phase; (5) subjecting the first gas phase to a second gas-liquid separation at a temperature of 30-60 DEG C. to obtain a second liquid phase, and mixing the first liquid phase with the second liquid phase to obtain a liquid phase mixture; (6) carrying out a first distillation on the liquid phase mixture to obtain a light fraction and a heavy fraction; and (7) carrying out a second distillation on the heavy fraction to separate out a distillate oil and a residue, wherein the light fraction and the distillate oil are final liquid of the liquefaction. By utilizing the method for direct liquefaction of biomass, the obtained final liquid has a high yield and a low solid content of residue.

Method for direct liquefaction of biomass

The present invention discloses a method for producing light oil through liquefying biomass. The method comprises the following steps: (1) mixing a biomass, a hydrogenation catalyst and a solvent oil to prepare a biomass slurry; (2) carrying out a first liquefaction reaction with the biomass slurry and hydrogen gas to obtain a first reaction product; (3) carrying out a second liquefaction reaction with the first reaction product and hydrogen gas to obtain a second reaction product; (4) subjecting the second reaction product to a first separation operation to produce a light component and a heavy component; (5) carrying out vacuum distillation on the heavy component to obtain a light fraction; (6) mixing the light component with the light fraction to form a mixture, carrying out a hydrogenation reaction on the mixture to obtain a hydrogenation product; and (7) subjecting the hydrogenation product to fractionation operation to obtain a light oil. The two steps of liquefaction on the biomass, followed by separation, vacuum distillation and hydrogenation reaction enable the yield of the light oil to be increased.

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Beijing, China

Lilong Jiang