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Carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and Fischer-Tropsch synthesis method

A Fischer-Tropsch synthesis and catalyst technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of high stability and low, achieve excellent performance, Process simplification and high activity

Pending Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome that the Fischer-Tropsch synthesis catalyst that exists in the prior art is difficult to have high C 5+ The defects of hydrocarbon selectivity, high stability, high CO conversion rate and low carbon dioxide and methane selectivity provide a method for preparing a carrier, a carrier prepared by the method, a Fischer-Tropsch synthesis catalyst and a Fischer-Tropsch synthesis method

Method used

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  • Carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and Fischer-Tropsch synthesis method
  • Carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and Fischer-Tropsch synthesis method
  • Carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and Fischer-Tropsch synthesis method

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preparation example Construction

[0018] According to a first aspect of the present invention, a method for preparing a carrier is provided, the method comprising:

[0019] The carrier precursor is subjected to water vapor treatment in an atmosphere containing water vapor to obtain a carrier, the atmosphere containing water vapor contains water vapor and air, and the content of water vapor is 50-90% by volume;

[0020] The conditions of water vapor treatment include: the temperature is 400-700°C, the time is 1-10h, and the volumetric space velocity of air is 200-3000h -1 .

[0021] In the prior art, the carrier precursor is often extruded to obtain a carrier that meets the requirements of use. In the preparation method provided by the present invention, the carrier precursor is directly subjected to the water vapor treatment in an atmosphere containing water vapor without extrusion molding. The average pore diameter of the prepared support can also be increased by steam treatment under specific conditions. ...

Embodiment approach

[0024] According to a preferred embodiment of the present invention, in the atmosphere containing water vapor, the content of water vapor is 60-80% by volume. In the course of research, the present invention finds that the water vapor treatment of the molded article is more conducive to the increase of the average pore diameter of the carrier through the atmosphere containing water vapor and air with the preferred water vapor content of the present invention.

[0025] According to the present invention, preferably, the type of the carrier precursor and the conditions of the water vapor treatment make the average pore diameter of the prepared carrier larger than that of the carrier precursor, which is characterized by BET low-temperature nitrogen adsorption. n is at least Δn=n2-n1, n1 is the average pore diameter of the carrier precursor, and n2 is the average pore diameter of the prepared carrier.

[0026] According to a preferred embodiment of the present invention, the amo...

preparation example 1

[0060] Get particle diameter and be 200 grams of pseudo-boehmite powder (purchased from Sasol company, hereinafter referred to as Sasol powder, the amount of sulfur-containing compound of this powder is less than 1000 μ g / g, pore volume, mean pore diameter and specific surface area are listed as 10-120 μ m In Table 1, the same below), after dissolving 2 grams of PEG400 and 4 grams of PVP in 200mL water, they were added to the above-mentioned pseudo-boehmite powder and mixed to obtain a mixed material, and an atmosphere containing water vapor was passed into the mixed material for water Steam treatment, the conditions of the steam treatment include: in an atmosphere with a water vapor to air volume ratio of 70:30, the volumetric space velocity of the air is 300h -1 , treated at a temperature of 550° C. for 4 h to obtain carrier A1. The pore volume, average pore diameter and specific surface area of ​​the carrier are listed in Table 1.

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Abstract

The invention relates to the field of catalyst preparation, and discloses a carrier, a preparation method thereof, a Fischer-Tropsch synthesis catalyst, and a Fischer-Tropsch synthesis method. The carrier preparation method comprises a step of processing a carrier precursor in a water steam containing atmosphere by water steam to obtain the carrier; wherein the water steam containing atmosphere comprises water steam and air, the content of water steam is 50 to 90 vol.%; and the conditions of water steam processing are: temperature 400-700 DEG C, time 1 to 10 hours, and air volume space velocity 200-3000<-1>. The carrier preparation method has the advantages of simple steps and mild conditions, the prepared carrier has good physical and chemical parameters; and when the catalyst prepared from the carrier is applied to Fischer-Tropsch synthesis, the catalyst has excellent properties, high activity, high selectivity and high stability.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a carrier and a preparation method thereof, a Fischer-Tropsch synthesis catalyst and a Fischer-Tropsch synthesis method. Background technique [0002] A good Fischer-Tropsch synthesis catalyst should be suitable for CO and H 2 It has adsorption activity, and has a hydrogenation effect on the adsorbed CO, and at the same time, it should not be too hydrogenated, too much water gas shift, and form inactive carbides. The first step of Fischer-Tropsch synthesis is CO and H 2 The chemisorption of transition elements with 3d and 4f bonds and energy levels from a structural chemical point of view are mostly used as active components of Fischer-Tropsch synthesis catalysts. Among them, there are many studies on Ni, Fe, Co and Ru. [0003] The influence of the carrier on the cobalt-based catalyst in the Fischer-Tropsch synthesis process is very complicated, and foreign companies also ...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J23/75B01J35/10C10G2/00
CPCC10G2/332B01J21/04B01J23/002B01J23/75B01J35/635B01J35/647B01J35/615
Inventor 孙霞侯朝鹏夏国富吴玉晋超阎振楠李明丰徐润
Owner CHINA PETROLEUM & CHEM CORP
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