Shell distributed catalyst and application thereof

A catalyst and shell technology, which is applied to the catalyst distributed in the shell and its application field, can solve the problems of reducing the probability of carbon chain growth, reducing selectivity, affecting binding, etc., and achieving the effects of good stability, high activity, and strong binding.

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the internal diffusion of reactants, H 2 The diffusion rate of CO is faster than that of CO, therefore, the diffusion limitation of CO in the catalyst particles is obviously stronger than that of H 2 , and due to the different particle sizes, the CO concen

Method used

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  • Shell distributed catalyst and application thereof
  • Shell distributed catalyst and application thereof
  • Shell distributed catalyst and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-7

[0049] Carriers used in Examples 1-4 are spherical silica particles (particle diameter is 2-4 mm, water absorption rate is 0.8 milliliters / gram), and carriers used in Examples 5-7 are cylindrical gamma-alumina particles (diameter of particle bottom surface is 2-4 mm, the particle height is 2-8 mm, and the water absorption rate is 0.8 ml / g), the amount of the carrier is 10 grams, and the first solution is prepared according to the materials listed in Table 1 and the carrier is impregnated, and the immersion time is 5 After impregnation, dry at 140°C for 4 hours, and bake at 450°C for 4 hours to obtain the carrier loaded with auxiliary components, and then prepare the second solution according to the materials listed in Table 2 and impregnate the aforementioned carriers loaded with auxiliary components respectively. The carrier is impregnated for 5 minutes, dried at 140°C for 4 hours after impregnated, and then calcined at 450°C for 4 hours to obtain catalysts C1-C7 loaded with a...

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Abstract

The invention provides a shell distributed catalyst and an application thereof. The catalyst is prepared and obtained according to the following steps: soaking a carrier in a first solution containing assistant compounds, drying, and controlling the soaking condition and the type of the first solution to allow the assistant compounds to distribute on the carrier in a shell manner so as to obtain the carrier carrying the assistant compounds; soaking the carrier carrying the assistant compounds in a second solution containing active compounds, drying, and controlling the soaking condition and the type of the second solution to allow the active compounds to distribute on the carrier in the shell manner so as to obtain a catalyst carrying the assistant compounds and the active compounds. The catalyst provided by the invention is firm in homonuclear combination of shell, long-periodic stability of structural distribution can be kept, and the catalyst is applied to F-T synthetic reaction and is higher in activity and good in stability; the activity and structure of the catalyst remain unchanged basically after long-time operation.

Description

technical field [0001] The invention relates to a shell-layer distributed catalyst and its application in Fischer-Tropsch synthesis reaction. Background technique [0002] For a gas-solid-liquid multiphase reaction system such as Fischer-Tropsch synthesis in a fixed-bed reactor, the particle size of the catalyst is generally required to be several millimeters. Therefore, the influence of diffusion control on the activity of the catalyst is unavoidable. And it has been noticed that the heavy paraffin wax synthesized by FT is usually attached to the surface of the catalyst in the form of liquid, aerosol or slurry, thus affecting the reactant H 2 and the diffusion of CO inside the catalyst particles. During the internal diffusion of reactants, H 2 The diffusion rate of CO is faster than that of CO, therefore, the diffusion limitation of CO in the catalyst particles is obviously stronger than that of H 2 , and due to the different particle sizes, the CO concentration gradient...

Claims

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Application Information

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IPC IPC(8): B01J35/00B01J23/75B01J23/83B01J23/888C10G2/00
Inventor 孙霞侯朝鹏夏国富吴玉李明丰徐润胡志海聂红
Owner CHINA PETROLEUM & CHEM CORP
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