Method for preparing oil product through synthesis gas hydrogenation

A synthesis gas and hydrogen preparation technology, which is applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, and the petroleum industry. efficiency effect

Active Publication Date: 2022-07-22
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the by-product CO on the iron-based catalyst of the current F-T synthesis 2 The problem that the selectivity is difficult to be effectively suppressed, the present invention provides a method for effectively suppressing WGS reactivity and CO by preparing a novel iron-based catalyst 2 Selectivity, a method to improve the efficiency of F-T synthesis reaction

Method used

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  • Method for preparing oil product through synthesis gas hydrogenation
  • Method for preparing oil product through synthesis gas hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Preparation of iron-based precursors: 1) Dissolving iron nitrate, manganese nitrate and copper nitrate in water to obtain solution 1, in which the molar ratio of Fe:Mn:Cu is 100:15:1; Fe, Mn and Cu metal ions are The total molar concentration in the water is 3.0mol / L; 2) Prepare an aqueous ammonia solution, NH 4 + 3) After preheating solution 1, ammonia solution and ethyl orthosilicate to 50°C, carry out co-current precipitation under stirring conditions, keep the temperature at 50°C and pH value of 7 to obtain a precipitation solution , where the molar ratio of Fe:Si is 100:20; 4) The precipitation solution is aged with stirring for 3h, filtered, washed, and dried at 300°C for 5h to obtain the precursor, which is marked as FMCS-1.

[0046] Silanation treatment of iron-based precursor: 1) Mix 4g of FMCS-1 and 100mL of toluene in a 250ml double-necked round-bottom flask, add 10g of octadecylmethyldimethoxysilane, and at 120°C in an air atmosphere and mechanical stirring...

Embodiment 2

[0055] Preparation of iron-based precursors: 1) Dissolving iron nitrate, manganese nitrate and copper nitrate in water to obtain solution 1, wherein the molar ratio of Fe:Mn:Cu is 100:10:1; Fe, Mn and Cu metal ions are The total molar concentration in the water is 2.0mol / L; 2) Prepare an aqueous ammonia solution, NH 4 + 3) After preheating solution 1, ammonia solution and ethyl orthosilicate to 40°C, carry out co-current precipitation under stirring conditions, keep the temperature at 40°C and pH value of 7 to obtain a precipitation solution , where the molar ratio of Fe:Si is 100:10; 4) The precipitation solution is aged with stirring for 1 h, filtered, washed, and dried at 400 °C for 5 h to obtain the precursor, which is marked as FMCS-2.

[0056] Silanation treatment of iron-based precursor: 1) Mix 4g of FMCS-2 and 80mL of toluene in a 250ml double-necked round-bottom flask, add 10g of phenyltris(dimethylsiloxane)silane, and at 120°C, Silanation treatment was carried out ...

Embodiment 3

[0062] Preparation of iron-based precursors: 1) Dissolving iron nitrate, manganese nitrate and copper nitrate in water to obtain solution 1, wherein the molar ratio of Fe:Mn:Cu is 100:25:1; Fe, Mn and Cu metal ions are The total molar concentration in the water is 4.5mol / L; 2) Prepare an aqueous ammonia solution, NH 4 + 3) After preheating solution 1, ammonia solution and ethyl orthosilicate to 55°C, carry out co-current precipitation under stirring conditions, keep the temperature at 55°C and pH value of 8 to obtain a precipitation solution , where the molar ratio of Fe:Si is 100:20; 4) The precipitation solution is aged by stirring for 2h, filtered, washed, and dried at 300°C for 3h to obtain the precursor, which is marked as FMCS-3.

[0063] Silanation treatment of iron-based precursor: 1) Mix 4g of FMCS-3 and 240mL of cyclohexane in a 500ml double-neck round-bottom flask, add 32g of octyltrimethoxysilane, and stir at 110°C under nitrogen atmosphere and mechanical stirring...

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Abstract

The invention belongs to the field of oil product synthesis, and particularly relates to a method for preparing an oil product through synthesis gas hydrogenation. Aiming at the problem that the selectivity of a by-product CO2 on an existing Fischer-Tropsch synthesis reaction iron-based catalyst is difficult to effectively inhibit, the invention provides a method for effectively reducing the selectivity of CO2 and improving the selectivity and reaction efficiency of the catalyst by preparing a novel iron-based catalyst. The preparation method comprises the following steps: preparing a FeMnCuSi precursor by adopting a precipitation method, carrying out two-step combined silanization modification treatment on the surface of the FeMnCuSi precursor to obtain the novel S-FeMnCuSi catalyst, and when the novel S-FeMnCuSi catalyst is used for a Fischer-Tropsch synthesis reaction, effectively inhibiting the selectivity of CO2 to be less than 1mol%; meanwhile, the catalyst shows excellent sintering resistance and reaction stability. The method has the advantages of low catalyst cost, high reaction efficiency, simple process operation and the like, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of oil product synthesis, in particular to a method for preparing oil products by hydrogenation of synthesis gas. Background technique [0002] The exploitation and utilization of petroleum resources promotes the rapid development of human society. However, the rapid development of petrochemical industry has led to the continuous depletion of petroleum resources. Since 2019, my country's annual crude oil imports have exceeded 500 million tons. my country's energy structure is rich in coal and low in oil. The preparation of oil products and chemicals necessary for production and life from coal resources is of great significance to my country's energy strategic security and industrial structure adjustment. Fischer-Tropsch synthesis technology (F-T synthesis) can convert coal-based synthesis gas (CO+H 2 ) is catalytically converted into oil products, so it is regarded as one of the common routes for the conversion an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C10G2/00
CPCB01J23/002B01J23/8892C10G2/332B01J2523/00B01J2523/17B01J2523/41B01J2523/72B01J2523/842
Inventor 崔晓静邓天昇牛宇岚张郃杨红宋永波
Owner TAIYUAN INST OF TECH
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