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A kind of unsupported catalyst and its preparation method and application

A catalyst and carrier-free technology, which is applied in the preparation of heterocyclic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds, etc., can solve the problems of limiting the effect of additives, achieve the effects of improving catalytic reaction performance, low product cost, and promoting reduction

Active Publication Date: 2018-10-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes a considerable part of the additives covered by active metal components, and the additives cannot contact the reactants to play a role in the surface catalytic contact reaction, which greatly limits the effect of the additives.

Method used

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  • A kind of unsupported catalyst and its preparation method and application
  • A kind of unsupported catalyst and its preparation method and application
  • A kind of unsupported catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A preparation method for an iron-based inversion catalyst that can be used for Fischer-Tropsch synthesis, comprising the steps of:

[0072] 1. Preparation of active metal oxide nanoparticles:

[0073] Weigh 1.95g of ferric chloride and 0.2g of trisodium citrate, add 40ml of ethylene glycol after mixing, and stir for 0.5h to obtain solution A;

[0074] Weigh 4g of sodium acetate and dissolve it in 40ml of glycerol, stir for 0.5h to obtain solution B;

[0075] Slowly add solution B to solution A, and keep stirring for 3h;

[0076] Move the above solution into a polytetrafluoroethylene container, seal it in a stainless steel autoclave, heat and react at 150°C for 10 hours, and then cool it to room temperature; after centrifuging the above product, wash it with ethanol three times, and then heat it at 60°C Drying for 10 h under the hood to obtain ferric oxide microspheres with a diameter of about 250 nm.

[0077] figure 1 It is the SEM image of the ferric oxide microsph...

Embodiment 2

[0089] Same as Example 1, the difference is:

[0090] 2. In the preparation of the catalyst:

[0091] 1) The drying temperature is 60°C, and the temperature is constant for 12 hours;

[0092] 2) The drying temperature is 60°C, and the temperature is constant for 24 hours.

[0093] The catalyst obtained is identical to the application of Example 1, and the reaction results are shown in Table 1.

Embodiment 3

[0095] Same as Example 1, the difference is:

[0096] 2. In the preparation of the catalyst:

[0097] 1) The drying temperature is 180°C, and the temperature is constant for 24 hours;

[0098] 2) The drying temperature is 180°C, and the temperature is kept constant for 48 hours.

[0099] The application method of the obtained catalyst is the same as in Example 1, and the reaction results are shown in Table 1.

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Abstract

An unsupported catalyst and a preparation method therefor. The catalyst comprises an active metal oxide and an auxiliary agent embedded on the outer surface of the active metal oxide. The active metal oxide is one or more selected from oxides of the following metals: ferrum, cobalt, nickel, and copper. The auxiliary agent is one or more selected from the following elements: ferrum, cobalt, nickel, copper, rhodium, manganese, potassium, silver, calcium, magnesium, zirconium, aluminum, zinc, ruthenium, platinum, sodium, and phosphorus. The auxiliary agent is present in the form of a simple substance or an oxide.

Description

technical field [0001] The present invention relates to the field of catalysts. More specifically, it relates to an unsupported catalyst and its preparation method and application. Background technique [0002] The catalytic conversion of CO hydrogenation to liquid fuels or chemicals is the core process for the indirect conversion and utilization of non-oil-based carbon resources such as coal, coalbed methane, shale gas and biomass. Because the products of CO hydroconversion reaction are complex and diverse, the control of its selectivity is extremely important. Taking the Fischer-Tropsch synthesis reaction of CO hydrogenation to hydrocarbons as an example, its products obey the Anderson-Schulz-Flory (ASF) distribution on traditional catalysts. The distribution is wide and the product selectivity is poor. The development of new Fischer-Tropsch catalysts with adjustable product selectivity is a major challenge in this direction. [0003] Taking coal-based natural gas as an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/89B01J27/185C10G2/00C07C9/04C07C1/04C07C31/04C07C29/154C07C47/19C07C45/58C07C31/20C07C29/141B82Y30/00
CPCB01J23/70Y02P20/52
Inventor 张燚刘意陈建峰
Owner BEIJING UNIV OF CHEM TECH
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