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Fischer-Tropsch synthesis method and heavy oil and light oil production method

A technology of Fischer-Tropsch synthesis and chemical synthesis, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve problems such as emissions, improve energy efficiency, save fresh water consumption, reduce manufacturing costs and control costs Effect

Inactive Publication Date: 2017-05-03
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a novel Fischer-Tropsch synthesis method and a production method for heavy and light oils in order to overcome the problems of high energy consumption, water consumption and waste water discharge in the Fischer-Tropsch synthesis process in the prior art

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  • Fischer-Tropsch synthesis method and heavy oil and light oil production method
  • Fischer-Tropsch synthesis method and heavy oil and light oil production method
  • Fischer-Tropsch synthesis method and heavy oil and light oil production method

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[0016] On the one hand, the present invention provides a kind of Fischer-Tropsch synthesis method, and this method comprises: make coal gasification synthesis gas enter Fischer-Tropsch synthesis reactor, carry out Fischer-Tropsch synthesis reaction under the effect of iron-based catalyst, in described coal gasification synthesis gas h 2 And CO volume ratio is 0.4-1.2:1, the catalyst of described Fischer-Tropsch synthesis is iron-based catalyst, and the CO of described iron-based catalyst 2 The selectivity is 35-50%.

[0017] Preferably, the H in the coal gasification synthesis gas 2 The volume ratio to CO is 0.6-1.0:1, which can further reduce energy consumption, water consumption and wastewater discharge in the Fischer-Tropsch synthesis process.

[0018] In the present invention, the coal gasification synthesis gas contains H 2 , CO, N 2 , CO 2 and CH 4 , where, in addition to H 2 In addition to the above ratio requirements for the volume ratio of CO and CO, for N 2 ,...

Embodiment 1

[0035] This example is used to illustrate the Fischer-Tropsch synthesis method and the production method of heavy and light oil of the present invention.

[0036] Such as figure 1 As shown, the production process of heavy and light oil is a cycle process, and the specific cycle process is: the 817,000 Nm 3 / h coal gasification synthesis gas (H 2 content of 37.2%, CO content of 62.0%, N 2 The content is 0.776%, CO 2 content of 0.001% and CH 4 content is 0.023%) into the fine desulfurization reactor 1 for preheating desulfurization treatment (sulfur content is controlled to 2 Selectivity is 50%, and the composition of catalyst is Fe:Cu:K=100:7:9) under the effect of weight, control reaction temperature is 255 ℃, and reaction pressure is 3.0MPa, and reactor inlet gas volume flow rate and catalyst The mass ratio is 12000:1Nm 3 / h / t, the superficial gas velocity at the reactor inlet is 0.35m / s, carry out the Fischer-Tropsch synthesis reaction, discharge heavy wax 71t / h from th...

Embodiment 2

[0038] This example is used to illustrate the Fischer-Tropsch synthesis method and the production method of heavy and light oil of the present invention.

[0039] Such as figure 1 As shown, the production process of heavy and light oil is a cycle process, and the specific cycle process is: the 817,000 Nm 3 / h coal gasification synthesis gas (H 2 content of 49.6%, CO content of 49.6%, N 2 The content is 0.776%, CO 2 content of 0.001% and CH 4 content is 0.023%) into the fine desulfurization reactor 1 to carry out preheating desulfurization treatment (sulfur content control is 2 Selectivity is 35%, and the composition of catalyst is Fe:Cu:K=100:7:9) under the effect of weight, control reaction temperature is 230 ℃, and reaction pressure is 4.0MPa, and reactor inlet gas volume flow rate and catalyst The mass ratio is 18000:1Nm 3 / h / t, the superficial gas velocity at the reactor inlet is 0.4m / s, carry out the Fischer-Tropsch synthesis reaction, discharge heavy wax 71t / h from ...

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Abstract

The present invention relates to a Fischer-Tropsch synthesis method, which comprises that coal gasification synthesis gas enters a Fischer-Tropsch synthesis reactor and is subjected to a Fischer-Tropsch synthesis reaction under the action of an iron-based catalyst, wherein a volume ratio of H2 to CO in the coal gasification synthesis gas is 0.4-1.2:1, the Fischer-Tropsch synthesis catalyst is an iron-based catalyst, and the CO2 selectivity of the iron-based catalyst is 35-50%. The invention further relates to a heavy oil and light oil production method. Compared to the method in the prior art, the method of the present invention has the following advantages that the Fischer-Tropsch synthesis wastewater treatment capacity can be reduced by more than 50%, the fresh water consumption can be saved by about 10-20%, and the energy source conversion efficiency can be increased by about 2-3%. According to the present invention, the Fischer-Tropsch synthesis reaction and the water gas conversion reaction are highly coupled by using the iron-based catalyst having the CO2 selectivity of 35-50% through the volume ratio of H2 to CO in the coal gasification synthesis gas of 0.4-1.2:1 so as to significantly reduce the energy consumption, the water consumption and the wastewater emission during the Fischer-Tropsch synthesis process and improve the energy efficiency of the whole system.

Description

technical field [0001] The invention relates to the field of indirect coal liquefaction, in particular to a Fischer-Tropsch synthesis method and a production method of heavy and light oil. Background technique [0002] The indirect coal liquefaction process converts coal into clean liquid fuel, but it is also a high energy and water consumption process, with an energy conversion efficiency of about 42% and a fresh water consumption of about 10t / t of product. Fischer-Tropsch synthesis is the core unit of the indirect coal liquefaction process. As disclosed in patent application 201110268041.5, in the Fischer-Tropsch synthesis reaction system under the action of an iron-based catalyst, in addition to the main reaction for producing hydrocarbons, there are also water-gas shift reactions and methane Generate a reaction. Among them, the water-gas shift reaction can release hydrogen in water and supplement the hydrogen source to the reaction system, but when the selectivity of th...

Claims

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Application Information

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IPC IPC(8): C10G2/00B01J23/78
Inventor 李初福许明卜亿峰门卓武田博
Owner CHNA ENERGY INVESTMENT CORP LTD
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