A kind of hydrogen-supplemented methanation method for producing synthetic natural gas

A technology for synthesizing natural gas and supplementing hydrogen methane, applied in the field of methanation, can solve the problem of methanation without supplementary hydrogen, and achieve the effects of reducing CO2 emissions, saving equipment investment and operating costs, and reducing carbon tax expenditures

Active Publication Date: 2018-03-27
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

At present, there is no technology related to supplementary hydromethanation

Method used

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  • A kind of hydrogen-supplemented methanation method for producing synthetic natural gas
  • A kind of hydrogen-supplemented methanation method for producing synthetic natural gas

Examples

Experimental program
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Embodiment Construction

[0045] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0046] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0047] according to figure 1 The process scheme shown carries out the methanation of the feed gas.

[0048] In the coal-to-natural gas process with an annual output of 1 billion cubic meters of synthetic natural gas, the pressure is 3.5MPa, 256200Nm 3 / h of synthesis gas (for coal-based natural gas) and the total sulfur in the synthesis gas is less than 0.1ppm, f=(n H2 -n CO2 ) / (n CO +n CO2 )=1.209 (n represents mole), the composition (volume fraction, dry basis) of concrete synthesis gas is: H 2 : 52.00, CH 4 : 14.00, CO: 23.10, CO 2 : 10.90.

[0049] According to the volume ratio of 0.12, 0.16, 0.26 and 0.46, the raw material gas is divided into four streams and enters the first adiabatic methanation reactor 1, the se...

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Abstract

The invention discloses a hydromethanation method for producing synthetic natural gas. The method comprises the following steps: (1) inputting the methanation raw material gas and water vapor into the main methanation device for methanation reaction; the methanation raw material gas is coal gas and / or coke oven gas; (2) the The outlet gas of the main methanation unit is mixed with H2 and then input to the auxiliary methanation unit for methanation reaction; the outlet gas of the auxiliary methanation unit is cooled and separated from gas and liquid to obtain synthetic natural gas products; the temperature of the H2 is 250 ℃~300℃. The hydrogen replenishment process provided by the invention can realize the control of H2 and CO2 content in the product gas, realize the control of product quality, and obtain high-quality synthetic natural gas products.

Description

technical field [0001] The invention relates to a hydrogenation methanation method for producing synthetic natural gas, which belongs to the field of methanation. Background technique [0002] Coal is the main source of fossil energy in my country, and the reserves of coal are extremely rich. The proven reserves are as high as 1.28 trillion tons. Oil and natural gas resources are relatively scarce, and the domestic oil and gas production is far from meeting the needs of the rapid development of the national economy. We must rely on a large amount of imports to support the development of our country's economy. my country's import of crude oil has increased from 70 million tons in 2000 to 250 million tons in 2011, and its dependence on foreign oil imports reached 55.2% in 2012. In 2009, my country's natural gas production was 830×10 8 N m 3 , an increase of 7.7% compared with 2008. The apparent consumption is 874.5×10 8 N m 3 , an increase of 11.5% year-on-year. Compare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08
Inventor 宋鹏飞侯建国姚辉超王秀林张瑜高振穆祥宇
Owner CHINA NAT OFFSHORE OIL CORP
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