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A method and system for comprehensive utilization of coal-based synthesis gas

A coal-based synthesis gas and synthetic natural gas technology, applied in the field of coal chemical industry, can solve problems such as single raw materials and evaluation conditions, poor product adjustment flexibility, and unstable device operation, so as to improve anti-risk ability, obvious environmental protection effect, and good economy benefit effect

Active Publication Date: 2016-09-07
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Abstract
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Problems solved by technology

[0003] No. 200810055528.3 Chinese patent application discloses a low-carbon alcohol (C 1 -C 5 Alcohol mixture) co-production of gasoline fraction catalyst preparation method and application, by introducing VIII group elements and alkali metals, alkaline earth metals to modify Fe-Cu-based catalysts, the reaction results show that this method can effectively improve CO utilization and improve C 2 + Alcohol and C 4 + The selectivity of hydrocarbons, but its raw materials and evaluation conditions are relatively simple, and its adaptability to raw materials is poor
CN102872870A discloses a preparation method and application of a catalyst for the co-production of high-carbon alcohols from synthesis gas to distillate oil. The catalyst is a confinement metal cluster supported by a porous carbon material, but this method can only be achieved by changing the active component of the catalyst. The ratio adjusts the reaction product, and the flexibility of device operation and product adjustment is poor
CN102553611A discloses a catalyst for producing methane from syngas and co-producing low-carbon olefins. The active component of the catalyst is Fe 2 o 3 , additives are Mn, K, Zn, Cr, etc., prepared by co-precipitation method, but this method needs to adjust the product distribution by changing operating conditions such as temperature and pressure, which may easily cause unstable operation of the device

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  • A method and system for comprehensive utilization of coal-based synthesis gas
  • A method and system for comprehensive utilization of coal-based synthesis gas
  • A method and system for comprehensive utilization of coal-based synthesis gas

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Embodiment 1

[0050] This embodiment provides a method for comprehensive utilization of coal-based synthesis gas, which uses a system in which a first-stage synthetic methanol reactor is connected to a first-stage F-T synthetic oil reactor, and its process is as follows figure 1 As shown, the method includes the following steps:

[0051] The flow rate of the purified coal-based syngas is 16Nm 3 / h, the molar composition (the sum of the contents of each component is 100%) is: CO 33.5%, H 2 54.3%, CO 2 0.9%, CH 4 11.2%, the rest is inert component N 2 and Ar;

[0052] The coal-based synthesis gas is fed into the first-stage methanol synthesis reactor to contact with the methanol synthesis catalyst for reaction. The reaction temperature is 230°C, the pressure is 2.0MPa, and the reaction space velocity is 1000h -1 , H 2 The / CO ratio is 1.6; the molar ratio of the metal elements of each component of the synthetic methanol catalyst is Cu:Zn:Ce:Al=40:25:6:29; the gas after the reaction is c...

Embodiment 2

[0055] This embodiment provides a method for comprehensive utilization of coal-based synthesis gas, which uses a system in which a reactor for synthesizing low-carbon alcohols is connected to a reactor for synthesizing natural gas. The process flow is as follows figure 2 As shown, the method includes the following steps:

[0056] The flow rate of the purified coal-based syngas is 16Nm 3 / h, the molar composition (the sum of the contents of each component is 100%) is: CO 33%, H 2 53%, CO 2 0.8%, CH 4 12.7%, the rest is inert component N 2 and Ar;

[0057] The coal-based synthesis gas is fed into the first-stage low-carbon alcohol synthesis reactor to contact with the low-carbon alcohol synthesis catalyst for reaction. The reaction temperature is 200°C, the pressure is 2.0MPa, and the reaction space velocity is 1000h -1 , H 2 The / CO ratio is 1.6; the molar ratio of the metal elements of the components of the synthetic low-carbon alcohol catalyst is Cu:Cr:K:Zn=40:15:15:30...

Embodiment 3

[0060] This embodiment provides a method for comprehensive utilization of coal-based synthesis gas, which uses a system in which a first-stage low-carbon alcohol synthesis reactor is connected to a first-stage F-T synthetic oil reactor, and a first-stage F-T synthetic oil reactor is connected to a first-stage synthetic natural gas reactor. The process flow is as follows image 3 As shown, the method includes the following steps:

[0061] The flow rate of the purified coal-based syngas is 16Nm 3 / h, the molar composition (the sum of the contents of each component is 100%) is: CO 31.2%, H 2 54.6%, CO 2 0.9%, CH 4 13.1%, the rest is inert component N 2 and Ar;

[0062] The coal-based synthesis gas is passed into the first-stage low-carbon alcohol synthesis reactor to contact with the low-carbon alcohol synthesis catalyst for reaction. The reaction temperature is 300°C, the pressure is 4.0MPa, and the reaction space velocity is 6000h -1 , H 2 The / CO ratio is 1.8; the molar ...

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Abstract

The invention provides a comprehensive utilization method and a comprehensive utilization system for coal-based synthesis gas. The method comprises the following steps, namely, a step of carrying out contact reaction on a gas and a catalyst for methanol synthesis and / or a step of carrying out contact reaction on the gas and a catalyst for low-carbon alcohol synthesis; a step of carrying out contact reaction on the gas and a catalyst for oil synthesis and / or a step of carrying out contact reaction on the gas and a catalyst for natural gas synthesis; and a step of reacting the coal-based synthesis gas according to a process formed by combining the previous steps. In addition, the invention also provides the comprehensive utilization system for coal-based synthesis gas. The system comprises one or a combination of a reactor for methanol synthesis and a reactor for low-carbon alcohol synthesis; and one or a combination of a reactor for oil synthesis and a reactor for natural gas synthesis. By the comprehensive utilization method and a comprehensive utilization system for coal-based synthesis gas provided by the invention, the economical efficiency of the device can be improved to a larger extent and the utilization rate of carbon resources in coal-based synthesis gas is increased.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a comprehensive utilization method and system of coal-based synthesis gas. Background technique [0002] As my country has an energy structure that is rich in coal, poor in oil and little in gas, with the continuous development of the national economy, the development of coal chemical technology has been paid more and more attention. At present, technologies such as coal gasification to synthesis gas, coal to natural gas, synthesis gas to methanol, synthesis gas to Fischer-Tropsch synthetic oil, and methanol to low-carbon olefins have been relatively mature at home and abroad, and there are also industrialized examples in China. These technologies are of great significance to solve the problem of my country's dependence on foreign crude oil imports. However, the economics of a single-product coal chemical production process is greatly affected by fluct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G2/00C10L3/10B01J19/00C07C29/157C07C29/154C07C31/04C07C31/02
CPCB01J19/0046C07C29/154C07C29/157C10G2/332C10G2/34C10G2300/70C10L3/08C07C31/04C07C31/02
Inventor 周红军余长春李然家王晓胜吴全贵
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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