Preparation method of hierarchical porous material-loaded cobalt-based catalyst

A cobalt-based catalyst and multi-stage pore technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, and the preparation of liquid hydrocarbon mixtures, can solve the problems of non-interconnection, zeolite uniformity, loading, etc., to avoid diffusion limitations, high water Thermal stability, the effect of high thermal stability

Inactive Publication Date: 2015-04-29
华文蔚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Tang Yi et al. (CN 01126842.5) used diatomite as a carrier, formed a zeolite film on its surface through the nano-zeolite seed crystal layer-by-layer assembly method, and then grew it secondary under an organic amine atmosphere, thus forming a zeolite film on the diatomite. Zeolite material with a certain strength and multi-level pore structure, but the pores of zeolized diatomite are not interconnected, which will limit the diffusion
[0009] Hiroko Shikata et al. used the sol-gel method to load Silicalit-1 on a multi-level channel through-flow silica gel material (Journal of Sol-G

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0022] Example 1

[0023] (1) According to the silicon source: aluminum source: ethanol: NH3: H2O = 1:20:25:0.1:1; the silicon source uses porous solid silica gel particles, and the aluminum source uses sodium aluminate. The above raw materials are mixed uniformly, and then the template is added The mass ratio of the added amount of the template agent to the aluminum source is 1:1; the template agent is porous carbon or porous polystyrene microspheres;

[0024] (2). The mixed solution obtained in step (1) is put into a crystallization kettle lined with polytetrafluoroethylene, crystallized at 120°C for 24 hours and at 200°C for 60 hours; filtered, washed, Dry, remove the template by three-stage temperature-controlled roasting, decompose the template at a low temperature of 200°C for 6.0 hours, decompose the template at a medium temperature of 250°C for 4.0 hours, and remove free carbon at a high temperature of 650°C for 20.0 hours; obtain a catalyst carrier precursor;

[0025] (3) T...

Example Embodiment

[0027] Example 2

[0028] (1) According to silicon source: aluminum source: ethanol: NH3: H2O = 1:30:35:0.4:3; silicon source uses porous solid silica gel particles, aluminum source uses sodium aluminate, the above raw materials are mixed uniformly, and then the template is added The mass ratio of the added amount of the template agent to the aluminum source is 0.5:1; the template agent is porous carbon or porous polystyrene microspheres;

[0029] (2). The mixed liquid obtained in step (1) is put into a crystallization kettle lined with polytetrafluoroethylene, crystallized at 80°C for 24 hours and at 130°C for 48 hours; filtered, washed, Dry, remove the template by three-stage temperature-controlled roasting, decompose the template at a low temperature of 200°C for 6.0 hours, decompose the template at a medium temperature of 350°C for 4.0 hours, and remove free carbon at a high temperature of 550°C for 20.0 hours; obtain a catalyst carrier precursor;

[0030] (3) Treat the carrier ...

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Abstract

The invention discloses a preparation method of a hierarchical porous material-loaded cobalt-based catalyst. The method comprises the following steps: (1) evenly mixing a silicon source, an aluminum source, ethanol, NH3 and H2O at the ratio of 1 to (20-30) to (25-35) to (0.1-0.4) to (1-3), and adding a template agent at the mass ratio of the template agent to the aluminum source being (0.5-1) to 1; (2) putting the mixed liquid obtained from the step (1) into a crystallization kettle lined with polytetrafluoroethylene, filtering, washing, drying and removing the template agent through three-section temperature control roasting; (3) carrying out acid treatment on a carrier precursor to obtain a hierarchical porous carrier; and (4) dipping a saline solution dissolved with cobalt or a saline solution of cobalt and non-noble metal into the hierarchical porous material by adopting an equivalent-volume impregnation method for 10-48 hours, drying at 100-130 DEG C, and roasting at 300-600 DEG C for 4-10 hours, tabletting, and screening to prepare the hierarchical porous material-loaded cobalt-based catalyst.

Description

technical field [0001] The invention relates to a method for preparing a cobalt-based catalyst supported by a hierarchical porous material. Background technique [0002] Fischer-Tropsch synthesis refers to the process of synthesizing hydrocarbons from syngas in the presence of catalysts. Cobalt-based catalysts have high activity. The advantage of high C5+ selectivity is that it is a commonly used catalyst in Fischer-Tropsch synthesis. Although Fischer-Tropsch synthesis has been studied for more than ten years, with the shortage of petroleum resources in recent years and the improvement of citizens' awareness of environmental protection, Fischer-Tropsch synthesis as a gas-to-oil technology has received attention again. How to improve catalyst activity and maintain high C5+ selectivity is the goal that researchers are always pursuing. [0003] Biomass in nature, such as plant stems to leaves, human respiratory system and blood circulation system, all have a unique and optim...

Claims

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Application Information

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IPC IPC(8): B01J29/072C10G2/00
Inventor 华文蔚
Owner 华文蔚
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