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Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof

A Fischer-Tropsch synthesis and catalyst technology, which is used in catalyst activation/preparation, chemical instruments and methods, preparation of liquid hydrocarbon mixtures, etc., can solve the problem of catalyst activity and stability decline, active cobalt species prone to sintering, and hydrothermal stability. Deterioration and other problems, to achieve the effect of good hydrothermal stability, good anti-sintering ability, good catalytic performance

Pending Publication Date: 2019-09-24
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the existing deficiencies, to solve the poor dispersion of active metals under the high loading of cobalt-based catalysts, the active cobalt species are prone to sintering during roasting, reduction and reaction, and the hydrothermal stability changes under high water pressure. poor, resulting in problems such as catalyst activity and stability decline, providing a cobalt-based Fischer-Tropsch synthesis catalyst and its preparation method

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  • Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof
  • Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof
  • Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof

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preparation example Construction

[0039] A second aspect of the present invention provides a method for preparing a cobalt-based Fischer-Tropsch synthesis catalyst, wherein the method includes:

[0040] (1) The carrier is immersed in an equal volume of the first impregnation solution for the first impregnation, and then dried to obtain a catalyst intermediate, wherein the carrier is ZnO and TiO 2 and / or ZrO 2 Modified Al 2 O 3 carrier;

[0041] (2) the catalyst intermediate is impregnated in the second impregnating liquid with equal volume for the second impregnation, and then drying and roasting are carried out;

[0042] Wherein, the first immersion liquid is a solution containing soluble cobalt salt and a first auxiliary agent precursor, and the second immersion liquid is a solution containing soluble cobalt salt and a second auxiliary agent precursor.

[0043] According to the preparation method of the present invention, the dosage ratio of the carrier, the active component, and the first adjuvant and t...

Embodiment 1

[0066] This example is to illustrate the cobalt-based Fischer-Tropsch synthesis catalyst prepared by the preparation method of the present invention.

[0067] Step (1): Preparation of Carrier

[0068] Based on 500g pseudo-boehmite, according to the TiO in the carrier 2 , ZnO, Al 2 O 3 The weight ratio of the dosage is 6.5:2.2:100. Calculate and weigh the corresponding tetrabutyl titanate and the corresponding Zn(NO 3 ) 2 ·6H 2 O;

[0069] Tetrabutyl titanate, Zn(NO 3 ) 2 ·6H 2 O was mixed with pseudo-boehmite, 50 mL of dilute nitric acid with a concentration of 5% and 300 mL of deionized water, kneaded evenly and extruded into strips, then dried at 120 °C for 10 hours, and then calcined at 450 °C for 5 hours. get labeled TiO 2 -ZnO-Al 2 O 3 -1 carrier; and the carrier has a specific surface area of ​​157.7m 2 / g, the pore volume is 0.58cm 3 / g, the average pore diameter is 10.5 nm.

[0070] Step (2): Preparation of cobalt-based Fischer-Tropsch synthesis catalyst...

Embodiment 2

[0075] This example is to illustrate the cobalt-based Fischer-Tropsch synthesis catalyst prepared by the preparation method of the present invention.

[0076] Step (1): Preparation of Carrier

[0077] Based on 500g pseudo-boehmite, according to the TiO in the carrier 2 , ZnO, Al 2 O 3 The weight ratio of the dosage is 4.2:2.1:100 to calculate and weigh the corresponding tetrabutyl titanate and the corresponding Zn(NO 3 ) 2 ·6H 2 O;

[0078] Tetrabutyl titanate, Zn(NO 3 ) 2 ·6H 2 O was mixed with pseudo-boehmite, 50 mL of dilute nitric acid with a concentration of 5% and 300 mL of deionized water, kneaded evenly and extruded into strips, then dried at 120 °C for 10 hours, and then calcined at 500 °C for 5 hours. get labeled TiO 2 -ZnO-Al 2 O 3 -2 carrier; and the carrier has a specific surface area of ​​166.2m 2 / g, the pore volume is 0.61cm 3 / g, the average pore diameter is 9.5 nm.

[0079] Step (2): Preparation of cobalt-based Fischer-Tropsch synthesis catalys...

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Abstract

The invention discloses a cobalt-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. The cobalt-based Fischer-Tropsch synthesis catalyst comprises a carrier, an active component cobalt, a first assistant and a second assistant, wherein the carrier is a ZnO and TiO2 and / or ZrO2 modified Al2O3 carrier. Stepwise impregnation is used to respectively sequentially load the active component cobalt and the first assistant and load the active component cobalt and the second assistant on the carrier, and the carrier and the assistants synergistically act to make the cobalt-based Fischer-Tropsch synthesis catalyst have good anti-sintering ability and a good hydrothermal stability and have a good catalytic performance in the Fischer-Tropsch synthesis reaction. The preparation method has the advantages of simple preparation process, no pollution to the environment, and good industrial application prospect.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a cobalt-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. Background technique [0002] my country's oil resources are scarce. In order to alleviate the shortage of oil resources, reduce environmental pollution and ensure energy security, the conversion of coal into clean liquid fuels through indirect liquefaction is receiving extensive attention. The key technology in the indirect coal liquefaction process is the Fischer-Tropsch (F-T) synthesis reaction. The Fischer-Tropsch synthesis is a process in which synthesis gas is converted into hydrocarbons through catalytic reaction under high temperature and high pressure. The products are mainly linear alkanes and olefins. , in addition to water, CO 2 And a small amount of organic oxygen-containing compounds such as alcohols, ketones, and aldehydes. Fischer-Tropsch synthesis is an important way to convert coal, na...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/889B01J37/02C10G2/00
CPCB01J23/8986B01J23/8896B01J23/002B01J37/0205C10G2/333C10G2/332B01J2523/00B01J35/615B01J35/635B01J35/633B01J35/647B01J2523/27B01J2523/31B01J2523/47B01J2523/48
Inventor 杨霞李加波杨林颜秦绍东
Owner CHNA ENERGY INVESTMENT CORP LTD
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