Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

New technology for preparing natural gas through coke-oven gas methanation

A technology of natural gas and gas methane, applied in the application field of coke oven gas, can solve the problem of high energy consumption

Inactive Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a large amount of raw material gas is used for circulation in this process, a circulation compressor is required, and the energy consumption is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • New technology for preparing natural gas through coke-oven gas methanation
  • New technology for preparing natural gas through coke-oven gas methanation
  • New technology for preparing natural gas through coke-oven gas methanation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, the method for producing substitute natural gas by methanation of coke oven gas is as follows, and the flow chart is shown in Figure 4 :

[0027] After the coke oven gas is desulfurized, the composition (vol%) of the obtained mixed gas is: H 2 56.14, CH 4 31.28, CO 6.87, CO 2 2.08,N 2 1.20, C 2 h 6 2.43, the total sulfur content is less than 0.1ppm, and under the action of the nickel catalyst system with alumina as the carrier, the first-stage methanation reaction is carried out to obtain a mixed gas with a methane content of about 55%. The pressure of the first-stage methanation reactor is about is 2.0MPa, the reactor inlet temperature is about 250°C; the gas composition (vol%) at the outlet of the first-stage methanation reaction is: H 2 39.12, CH 4 55.20, CO 1.23, CO 2 1.37,N 2 1.10, C 2 h 6 1.98.

[0028] CO compensation at the inlet of the second-stage methanation reactor 2 , the inlet gas composition (vol%) of the second-st...

Embodiment 2

[0031] In this example, the method for producing substitute natural gas by methanation of coke oven gas is as follows, and the flow chart is shown in Figure 4 :

[0032] After the coke oven gas is desulfurized, the composition (vol%) of the obtained mixed gas is: H 2 56.14, CH 4 31.28, CO 6.87, CO 2 2.08,N 2 1.20, C 2 h 6 2.43, the total sulfur content is less than 0.1ppm, and under the action of the nickel catalyst system with alumina as the carrier, the first-stage methanation reaction is carried out to obtain a mixed gas with a methane content of about 55%. The pressure of the first-stage methanation reactor is about is 5.0MPa, and the reactor inlet temperature is about 350°C; the gas composition (vol%) at the outlet of the first-stage methanation reaction is: H 2 39.22, CH 4 53.20, CO 1.20, CO 2 1.32,N 2 1.15, C 2 h 6 2.91.

[0033] CO compensation at the inlet of the second-stage methanation reactor 2, the inlet gas composition (vol%) of the second...

Embodiment 3

[0036] In this example, the method for producing substitute natural gas by methanation of coke oven gas is as follows, and the flow chart is shown in Figure 4 :

[0037] After the coke oven gas is desulfurized, the composition (vol%) of the obtained mixed gas is: H 2 56.14, CH 4 31.28, CO 6.87, CO 2 2.08,N 2 1.20, C 2 h 6 2.43, the total sulfur content is less than 0.1ppm, under the action of the nickel catalyst system supported by alumina and magnesium aluminum spinel, the first-stage methanation reaction is carried out to obtain a mixed gas with a methane content of about 55%. The first-stage methane The pressure of the methanation reactor is about 2.0MPa, and the reactor inlet temperature is about 250°C; the gas composition (vol%) at the outlet of the first-stage methanation reaction is: H 2 39.12, CH 4 55.20, CO 1.23, CO 2 1.37,N 2 1.10, C 2 h 6 1.98.

[0038] Compensation C at the inlet of the second-stage methanation reactor 2 h 6 , the inlet gas...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a new technology for preparing natural gas through coke-oven gas methanation. The technology includes following steps: (1) performing desulfuration to coke-oven gas; (2) performing a methanation reaction in a three-stage adiabatic reactor, wherein hydrogen, carbon monoxide and carbon dioxide in the coke-oven gas are reacted to generate methane through a carbon compensation method at the inlet of the second stage of the methanation reactor; and (3) performing Condensation separation to obtain the natural gas with the content of methane being higher than 95%. The new technology can be used for prepare high-methane-content synthetic natural gas, is low in energy consumption, is free of circulating compressor and is less in equipment investment.

Description

technical field [0001] The invention belongs to the technical field of application of coke oven gas, in particular to a new process for producing natural gas by methanation of coke oven gas. Background technique [0002] With the increasing demand and import of natural gas, my country will face the challenge of natural gas supply security, and China has produced about 120 billion Nm per year in recent years 3 Part of coke oven gas is used to generate electricity, part is used to produce methanol to produce hydrogen, and a considerable part is directly discharged. The utilization rate is about 55%. Therefore, the project of using coke oven gas to produce natural gas can effectively recycle resources and generate high The economic benefits will help to form a good circular industrial chain. Using coke oven gas to produce synthetic natural gas (SNG) through methanation and then further produce compressed natural gas (CNG) or liquefied natural gas (LNG), its energy utilization ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/06
Inventor 黄先亮魏士新蔡进檀结东孟建朱艳芳蔡成伟张杰陈长新吴学其吴琳徐本刚
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com