Process for synthesizing natural gas by performing methanation on coke oven gas

A coke oven gas and chemical synthesis technology, which is applied in the petroleum industry, chemical recovery, gas fuel, etc., can solve the problems of increasing energy consumption and increasing equipment, and achieve the effects of saving heat energy, reducing consumption, and increasing the conversion rate of raw material gas

Active Publication Date: 2011-02-23
河北华丰能源科技发展有限公司
View PDF5 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to control the temperature in the methanation process of this process, a large amount of circulating water vapor is introduced

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
  • Process for synthesizing natural gas by performing methanation on coke oven gas
  • Process for synthesizing natural gas by performing methanation on coke oven gas
  • Process for synthesizing natural gas by performing methanation on coke oven gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, the domestic J101 methanation catalyst dispersed in the inert liquid phase medium (the catalyst concentration in the liquid phase is 30wt%) in the fresh catalyst storage tank 1 is pressed into the slurry bed methanation by the circulation pump 7 from the bottom through the pipeline p1 Reactor 2, then the composition becomes H 2 -10mol% and N 2 The reducing gas of -90mol% is introduced from the bottom of the slurry bed methanation reactor 2 through the pipeline p2, and after the temperature is raised to 400°C at a heating rate of 1°C / min, the catalyst is reduced at normal pressure. After the reduction is completed, the Reducing gas switch to (V%): H 2 57.6%, CH 4 26%, N 2 4%, O 2 0.4%, CO 8%, CO 22%, CmHn 2% coke oven gas, and exchange heat with the circulating catalyst in the pipeline p8 in the heat exchanger 3, while the pressure is raised to 3Mpa, and the temperature is adjusted to the reaction temperature, in the slurry bed methanation reactor 2 Carr...

Embodiment 2～11

[0030] On the basis of Example 1, Examples 2 to 11 are about the catalyst type, the concentration of the catalyst in the slurry bed methanation reactor, the type of inert liquid medium, the composition of the reducing gas, the space velocity of the reducing gas, the reducing temperature, and the reaction gas Space velocity, reaction temperature, and reaction pressure factors have been adjusted. See attached table 1 for specific data and results, and attached table 2 for the composition of feed gas and product gas.

[0031]

[0032] Schedule 2

[0033]

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 relates to a process for synthesizing natural gas by performing methanation on coke oven gas. The process comprises the following steps of: dispersing a fresh methanation catalyst into an inert liquid-phase medium and putting the mixture into a slurry bed methanation reactor for reducing; performing a methanation reaction on the reduced coke oven gas, introducing tail gas into a gas-liquid separator I, discharging a slurry liquid-phase component in the tail gas and the catalyst from the bottom of the gas-liquid separator I and exhausting a gas phase in the tail gas from the top of the gas-liquid separator I; introducing a part of catalyst-containing inert liquid-phase media into a gas-liquid separator II, exhausting a gas phase from the top of the gas-liquid separator II, combining the gas phase with the gas phase exhausted from the top of the gas-liquid separator I, cooling and performing pressure swing adsorption so as to obtain H2 and synthetic natural gas; and discharging a methanation catalyst-containing inert liquid-phase medium from the bottom, combining the methanation catalyst-containing inert liquid-phase medium with the slurry liquid-phase component and the catalyst which are discharged from the bottom of the gas-liquid separator I, filtering a large-particle catalyst of less than 300 meshes out, separating a fine catalyst of more than 300 meshes from the inert liquid-phase medium and discharging, mixing the separated inert liquid-phase medium and the large-particle catalyst, exchanging heat between the mixture and raw material gas, cooling, and introducing the mixture into the slurry bed methanation reactor together with the methanation catalyst which is newly dispersed into the inert liquid-phase medium for the methanation reaction. The process has the advantages that: the process has low energy consumption and small equipment investment, is easy to operate and can replace the catalyst on line.

Description

technical field [0001] The invention belongs to a process for synthesizing natural gas, in particular to a process for methanating coke oven gas to synthesize natural gas. Background technique [0002] As a kind of industrial exhaust gas, coke oven gas has a large output (in 2008, the total output of coke ovens in China was about 143 billion m 3 ), its recycling by methanation not only conforms to the policy requirements of energy conservation and emission reduction, but also can produce certain economic benefits. It is a technology with market prospects. [0003] The composition of coke oven gas (COG) is relatively complex and varies widely, depending on the properties of the coking coal used, coking methods and operating conditions. Its main composition (Vol) is: H 2 54-59%, CH 4 23-28%, N 2 3-5%, O 2 0.3-0.7%, CO 5.5-7%, CO 2 1.2-2.5%, C m h m 1.5-3%. H in coke oven gas 2 , CO, CO 2 Carrying out methanation reaction can produce artificial natural gas, and...

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
IPC IPC(8): C10L3/08C01B3/50
CPCY02P20/584
Inventor 崔晓曦李忠张庆庚闫少伟范辉郑华艳牛凤芹
Owner 河北华丰能源科技发展有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap