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FT synthesis catalyst as well as preparation method and application thereof

A technology of catalysts and oxides, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, and preparation of liquid hydrocarbon mixtures. It can solve the problems of unsatisfactory catalyst performance, high cost of raw materials, and low production efficiency, etc., to solve the problem of diffusion problems, increased methane selectivity, and the effect of large macroscopic surface areas

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation methods of inorganic hollow-shell microsphere materials generally have the problems of small scale and difficult expansion. At the same time, some preparation methods have low preparation efficiency and high raw material costs. The use of them as carriers to prepare catalysts has also been greatly restricted. At the same time, the prepared catalysts The performance can not meet the demand

Method used

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  • FT synthesis catalyst as well as preparation method and application thereof
  • FT synthesis catalyst as well as preparation method and application thereof
  • FT synthesis catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] In the preparation method of the present invention, the raspberry-type oxide microspheres can be prepared by the following methods, including:

[0067] Adding nitrate, peptizer, pore-forming agent, zirconium source and / or titanium source into the dispersant and stirring to obtain a dispersed slurry;

[0068] aging the dispersion; and

[0069] Send the aged dispersion slurry into a drying device, and dry it under the condition that the air inlet temperature is 400-1200°C, preferably 450-700°C; the outlet air temperature is 50-300°C, preferably 120-200°C molding to obtain raspberry-type oxide microspheres.

[0070] In the preparation method of the present invention, the nitrate is selected from one or more of aluminum nitrate, zirconium nitrate, lanthanum nitrate and yttrium nitrate. Nitrate ions in nitrate can promote the oxidant that can be used as a pore-forming agent under high temperature conditions, and they undergo self-propagating combustion reactions at high te...

Embodiment

[0099] Reagents, Instruments and Tests

[0100] In the following examples, preparation examples and comparative examples, the part raw material specifications used are as follows:

[0101] Ammonia, hydrochloric acid, nitric acid, sulfuric acid, aluminum sulfate, aluminum chloride, zirconium hydroxide, zirconium oxychloride, titanium tetrachloride, titanium dioxide (Sinopharm Chemical Reagent Co., Ltd., industrial grade);

[0102] Polyethylene glycol PEG4000 powder (Wenzhou Shuangxiao Rubber and Plastic Material Co., Ltd.);

[0103] Methylcellulose (Hubei Jiangmin Taihua Chemical Co., Ltd.);

[0104] Aluminum nitrate, titanium nitrate, zirconium nitrate, yttrium nitrate, magnesium nitrate (Yutai Qixin Chemical Co., Ltd., industrial grade)

[0105] The breakage ratio of supports and catalysts can be measured according to the following method:

[0106] First pass the microspheres to be tested through a 100-mesh sieve, then pass the sieved microsphere powder through a 150-mesh ...

preparation example 1

[0108] Add 30 kg of water into the reaction kettle, add 1.2 kg of zirconium nitrate therein, then add 2.5 kg of PEG4000, and finally add 7 kg of zirconium hydroxide, stir evenly and grind to obtain a dispersion slurry.

[0109] The dispersion slurry was aged with stirring at 45°C for 1.5 hours.

[0110] Send the aged dispersion slurry into a spray drying device to dry and shape to obtain raspberry oxide microspheres. The atomization pressure of the spray drying is 0.3-3.0MPa, and the pressure inside the tower is -0.0010-0.0090MPa; The temperature is 560°C, and the air outlet temperature at the end of drying is 110°C.

[0111] Microscopic pictures of raspberry-type oxide microspheres as figure 1 shown.

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Abstract

The invention provides an FT synthesis catalyst and a preparation method and application thereof. The FT synthesis catalyst comprises a carrier and an active metal component loaded on the carrier, the active metal component is selected from one or more of Co, Fe and Ru, and the carrier is raspberry type oxide microspheres. The raspberry type oxide microsphere is a hollow microsphere with a large hole in the surface, a hollow structure is arranged in the hollow microsphere, the large hole is communicated with the hollow structure to form a cavity with an opening in one end, and the oxide in the raspberry type oxide microsphere is selected from one or more of zirconium oxide and titanium oxide. The FT synthesis catalyst has the advantages that the FT synthesis conversion rate and C5 + hydrocarbon selectivity can be improved, the methane selectivity and CO2 selectivity are reduced, the methane selectivity of the catalyst cannot be obviously improved due to temperature rise, and the diffusion problem of FT synthesis reaction is obviously solved.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a FT synthesis catalyst and its preparation method and application. Background technique [0002] In the past few decades, a large number of literatures have carried out research reports on inorganic hollow-shell microsphere materials. Compared with ordinary dense spheres, hollow materials have lower density and larger specific surface area, and have been widely used in many fields such as drug catalyst carriers and gas adsorbents. In recent years, the research and application of inorganic hollow-shell microsphere materials More and more attention. [0003] Zirconia hollow spherical powder is a plasma spraying heat insulation material used for surface modification of mechanical parts such as aero-engines, gas turbines, and heat treatment equipment. The coating prepared by this powder has good thermal shock resistance and high-temperature thermal corrosion resistance. , spraying it on h...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/10B01J23/46B01J23/58B01J23/745B01J23/75B01J35/00B01J35/02B01J35/04B01J35/08B01J35/10B01J37/02C10G2/00
CPCB01J37/0201B01J21/066B01J21/10B01J21/063B01J23/75B01J23/745B01J23/462B01J23/78B01J23/58C10G2/332C10G2/333B01J35/50B01J35/30B01J35/51B01J35/56B01J35/613B01J35/615B01J35/635B01J35/633B01J35/647
Inventor 侯朝鹏徐润夏国富张荣俊阎振楠
Owner CHINA PETROLEUM & CHEM CORP