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Thin-layer hollow FT synthetic catalyst and use thereof

A catalyst, hollow technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from carbon oxides, etc. Effects of large porosity, improved mass transfer, high catalyst activity

Inactive Publication Date: 2009-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the catalyst is used in a fixed-bed reactor, it still cannot solve the heat transfer problem in the reaction well.

Method used

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  • Thin-layer hollow FT synthetic catalyst and use thereof

Examples

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preparation example Construction

[0016] When the catalyst also contains the auxiliary component, the preparation method of the catalyst further includes a step of introducing the auxiliary component into the catalyst. According to the usual method for preparing FT synthesis catalysts, the auxiliary component can be introduced during the preparation of the support, or can be introduced before, after or at the same time as the metal component is loaded. For example, the auxiliary component or the compound containing the auxiliary component is directly mixed with the carrier to be formed and / or the precursor during extrusion molding, and then the method of extrusion molding is introduced. Or it is introduced by the method of impregnating with the solution containing the auxiliary component compound before, after or simultaneously loading the metal component.

[0017] According to the catalyst provided by the present invention, it is necessary to reduce and activate the oxidized cobalt in the presence of hydrogen...

Embodiment 1～4

[0022] This example illustrates that the present invention provides a catalyst, its preparation method and performance.

[0023] Preparation of alumina carrier with hollow structure: Pseudo-boehmite is used as carrier precursor to prepare hollow carriers with different appearances by extrusion molding. The orifice plates are circular, three-lobed, and butterfly-shaped orifice plates with a circumscribed circular aperture of 2.1 mm, and the orifice pins are all circular pins with a diameter of 1 mm. The extruded product was dried at 120°C for 3 hours, and then calcined at 600°C for 3 hours with a heating rate of 3°C / min. The calcined carrier was cut into particles with a length of about 3 mm.

[0024] The following method is used to measure the pressure drop of different carrier packed beds: using air as the medium, the carrier particles are packed in a quartz tube with an inner diameter of 25 mm and a height of 250 mm to form a catalyst carrier bed. At both ends of the quartz...

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Abstract

The invention discloses a thin-layer hollow FT synthesis catalyst and application thereof. The catalyst contains a carrier and an effective amount of active metal component supported on the carrier. The catalyst is characterized in that the carrier has a thin-layer hollow structure, and the bulk density of the carrier is between 0.5 and 0.95. Compared with the prior granular catalyst, the catalyst with the hollow structure has larger outer surface and lower bulk density, and is particularly suitable for an FT synthesis reaction which adopts a fixed bed reactor.

Description

technical field [0001] The invention relates to a Fischer-Tropsch (FT) synthesis catalyst and its application, more specifically to a FT synthesis catalyst suitable for a fixed reaction bed and its application. Background technique [0002] The FT synthesis reaction is a typical heterogeneous catalytic reaction process, in which the relationship between the gas, liquid and solid phases is complex. For example, substances in the gas phase (including hydrogen, CO, CO 2 and low-carbon hydrocarbons, etc.), liquid-phase substances (high-carbon hydrocarbons), solid-phase substances (catalysts), and under reaction conditions, the heavy hydrocarbons (paraffin wax) generated by the FT synthesis reaction are attached to the surface of the catalyst in liquid form or in the form of vapor The sols are in the form of being dispersed in the main gas stream of the reaction mixture or miscible in a slurry solvent. Under these conditions, the catalytic reaction takes place on the surface of...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J21/16C07C1/04
Inventor 侯朝鹏夏国富孙霞王倩刘斌吴昊徐润李明丰聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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