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A kind of preparation method of liquid fuel

A liquid fuel and preparation process technology, which is applied in the preparation of liquid hydrocarbon mixtures, biological raw materials, petroleum industry, etc., can solve the problems of complex reaction, decreased catalyst activity, deactivation, etc., and achieves simple preparation process, easy separation, and reduced energy. consumption effect

Active Publication Date: 2021-02-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex reaction of the process, and the raw material contains water or water is produced during the reaction, at high temperature, water is often considered as a poisoning agent, which reduces the activity of the catalyst or even deactivates it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Catalyst preparation

[0025] CeO 2 The preparation adopts the precipitation method. Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add ammonia water to adjust the pH=11, stir for 4h, filter, dry, and roast at 500°C for 4h to obtain 10g of CeO 2 . Pt / CeO 2 Adopt co-precipitation method, weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add a certain amount of chloroplatinic acid at the same time, make the Pt content 2wt%, add ammonia water to adjust pH=11, appear precipitation, after continuing to stir for 4h, the obtained The precipitate was separated by centrifugation, dried, and calcined at 500°C for 4 hours to obtain Pt / CeO 2 catalyst.

[0026] Two-stage process for preparing liquid fuels

[0027] Form and sieve the above two catalysts with 14-25 mesh respectively and fill them into the reaction tube. The first stage filled catalyst is CeO 2 , the height of the packed bed is 6cm, the reaction temperature is ...

Embodiment 2

[0029] Catalyst preparation

[0030] CeO 2 The preparation adopts the precipitation method. Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add ammonia water to adjust the pH=11, stir for 4h, filter, dry, and roast at 500°C for 4h to obtain 10g of CeO 2 . Ru / CeO 2 Using the impregnation method, weigh 25g of cerium nitrate hexahydrate and dissolve it in 150mL of water, add a certain amount of ruthenium chloride at the same time, so that the content of Pt is 2wt%, stir it at room temperature for 24h, evaporate it to dryness at 100°C, Roast for 4h to get Ru / CeO 2 catalyst.

[0031] Two-stage process for preparing liquid fuels

[0032] Form and sieve the above two catalysts with 14-25 mesh respectively and fill them into the reaction tube. The first stage filled catalyst is CeO 2 , the height of the packed bed is 6cm, the reaction temperature is 230°C, the raw material is acetic acid, and the mass space velocity of the feed is: 0.1h -1 . Nitroge...

Embodiment 3

[0034] Catalyst preparation

[0035] CeO 2 The preparation adopts the solid phase pyrolysis method. Weigh 25g of cerium nitrate hexahydrate, put it into a muffle furnace, and roast it at 500°C for 4 hours in an air atmosphere to obtain CeO 2 ;Pd / CeO 2 Using the impregnation method, weigh 25g of cerium nitrate hexahydrate and dissolve it in 150mL of water, add a certain amount of palladium nitrate at the same time, so that the Pd content is 5wt%, stir at room temperature for 24h, evaporate it to dryness at 100°C, and roast at 500°C for 4h , namely Pd / CeO 2 catalyst.

[0036] Two-stage process for preparing liquid fuels

[0037] The above two catalysts were respectively formed and sieved to 14-25 mesh and filled into the reaction tube. The first stage filled catalyst is CeO 2 , the height of the packed bed is 6cm, the reaction temperature is 230°C, the raw material is acetic acid, and the mass space velocity of the feed is: 0.1h -1 . Argon was used as the carrier gas at...

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Abstract

The invention relates to a preparation method of liquid fuel. This method adopts acetic acid or acetic acid aqueous solution as reactant, in ceria (CeO 2 ) and CeO supported by precious metals 2 Under the co-catalysis of the catalyst, the liquid fuel is prepared through a two-stage reaction under normal pressure. The first stage catalyst is CeO 2 , the reaction temperature is 100-300°C, the raw material is acetic acid, and the mass space velocity of the feed is: 0.1-1.0h ‑1 . The second stage catalyst is CeO supported by noble metal 2 , the reaction temperature is 150-350°C, and the hydrogen flow rate is 5mL / min-30mL / min. The method uses CeO 2 And the supported cerium-based material is the catalyst, the catalyst is simple to prepare, has good stability, and efficiently catalyzes the two-stage method of acetic acid to generate hydrocarbons, and can be used as a liquid fuel with a conversion rate of up to 85%. The total choice of hydrocarbons Responsibility can reach >99%. The process uses acetic acid or acetic acid aqueous solution as a raw material, has a wide range of sources, and has potential industrial application prospects.

Description

technical field [0001] The invention relates to a method for preparing liquid fuel, in particular to a method for preparing liquid fuel by using acetic acid or an aqueous solution of acetic acid as a reactant and utilizing a series reaction two-stage method. Background technique [0002] In today's world, with the development of industry, the consumption of fossil fuels is increasing year by year. Due to their non-renewable nature, they are already facing the possibility of resource depletion. Therefore, ways to develop new fuels are attracting increasing attention. [0003] Acetic acid is a very important basic organic chemical product. The world's acetic acid industrial production processes mainly include methanol carbonylation, acetaldehyde oxidation (ethylene acetaldehyde oxidation and ethanol acetaldehyde oxidation), ethylene direct oxidation and ethane oxidation law etc. At present, methanol carbonylation is dominant, and its production capacity accounts for about 95...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 王峰王业红张健张志鑫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI