Technological process of preparing diesel oil fraction selectively with Fischer-tropsch synthetic gas

A technology for Fischer-Tropsch synthesis and synthesis gas, which is used in the petroleum industry, recovery of liquid hydrocarbon mixtures, etc., and can solve problems that have not yet been seen.

Inactive Publication Date: 2003-05-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no production method that uses metallic cobalt loaded on activated carbon as a catalyst to directly synthesize diesel fractions.

Method used

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  • Technological process of preparing diesel oil fraction selectively with Fischer-tropsch synthetic gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] use figure 1 In the process flow, the reaction is carried out under the following reaction conditions.

[0045] The production method of the present invention adopts a one-stage method to directly prepare a product mainly composed of diesel fraction alkanes from the synthesis gas. Syngas is mainly composed of H 2 And CO, and H 2 / CO volume ratio is 1.0~4.0; the Fischer-Tropsch synthesis catalyst is a metal-containing cobalt / activated carbon carrier catalyst; the reaction conditions for Fischer-Tropsch synthesis are: reaction temperature is 120-400℃, reaction pressure is 0.05-10Mpa, and synthesis gas space velocity is 100~5000h -1 .

[0046] In addition, in figure 1 In the process shown, CO and H in a certain appropriate ratio 2 The synthesis gas comes from the pipeline (1). The gas is first purified by the purification pipe (2), and its flow is controlled by the mass flow meter (3). After being preheated by the preheater (4), it enters the FT synthesis reactor (5). The reac...

Embodiment 2

[0048] 40% (weight) of the 180-245℃ boiling range fraction, which comes from the Fischer-Tropsch synthesis thermal separation tank, and 60% (weight) of the heavy fraction (250-380℃ boiling range), this part of the product must The diesel fuel obtained by regular pressure filtration through a microporous filter (50μm) and mixed is called diesel fuel A. Therefore, the boiling range of this mixed diesel fuel is 180-380°C. Diesel fuel A is used in the present invention. The described cobalt-based catalyst supported by activated carbon directly synthesizes a representative of a complete typical diesel fuel through Fischer-Tropsch synthesis.

Embodiment 3

[0050] 45% (weight) of the 180~245℃ boiling range fraction, which comes from the thermal separation tank of the Fischer-Tropsch synthesis, and 55% (weight) of the heavy fraction (250~380℃ boiling range), this part of the product must The diesel fuel obtained by regular pressure filtration through a microporous filter (50μm) and mixed is called diesel fuel B. Therefore, the boiling range of this mixed diesel fuel is 180-380°C. Diesel fuel B is used in the present invention. A representative example.

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Abstract

The one-stage production process is used to the prepare product with diesel oil fraction as main component from synthetic gas. The synthetic gas consists of H2 and CO in the volume ratio of 1.0-4.0 as main components; and the Fischer-Tropsch synthesis catalyst is a metal Co/active carbon carrier catalyst. The reaction conditions of Fischer-Tropsch synthesis include: reaction temperature of 120-400 deg.c, reaction pressure of 0.05-10 MPa, and space velocity of synthetic gas of 100-5000/hr. The product of the present inventino is diesel oil fraction in 180-380 deg.c, contains alkane of at least95%, with isomeric hydrocarbon/normal hydrocarbon ratio of 0.03-0.3, S and N2 content lower than 50 ppm, unsaturately hydrocarbon content lower than 2% and oxygen content of 0.001-0.3%.

Description

Technical field [0001] The invention provides a catalytic process for directly and selectively preparing straight-chain alkanes with carbon numbers within 20 and hydrocarbon carbon numbers mainly concentrated in diesel fractions through a one-stage method of Fischer-Tropsch synthesis using syngas as raw materials. Background technique [0002] The main component of oilfield associated gas is low-carbon hydrocarbons, mainly methane. Since these oil and gas resources are far away from the consumer market, the transportation and utilization of this part of natural gas is quite difficult. Therefore, the indirect conversion technology of natural gas, namely GTL technology, is currently used. The so-called GTL technology is the core process of converting natural gas into liquid fuels, that is, through Fischer-Tropsch Synthesis (Fischer-Tropsch Synthesis), converting natural gas into clean liquid fuels (such as gasoline, diesel, alcohols, etc.) through synthesis gas. In recent years, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G5/00
Inventor 丁云杰马文平吕元林励吾
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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