Method and device for preparing synthetic natural gas

A technology for synthesizing natural gas and gas, which is applied in the direction of gas fuel, petroleum industry, fuel, etc. It can solve the problem of product gas back-mixing into raw material gas, achieve the effects of reducing high-temperature carbon deposition, convenient operation, and prolonging life

Active Publication Date: 2010-10-06
PUJING CHEM IND SHA
View PDF8 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the reaction process. In order to achieve the purpose of controlling the temperature rise of the reaction, the general method is to reduce the amount of reaction by reducing the content of CO in the feed gas, thereby reducing the heat of reaction and controlling the temperature rise of the reaction. For example, in the patent "A method for producing synthetic natural gas by using coke oven gas" (publication number CN1919985) adopts a dilution method and a two-stage conversion method, wherein the dilution method is to mix the methanation product back into the feed gas, and the cycle gas is relatively high, while the two-stage

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
  • Method and device for preparing synthetic natural gas
  • Method and device for preparing synthetic natural gas
  • Method and device for preparing synthetic natural gas

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0031] The present invention will be described in further detail below in conjunction with some specific examples.

[0032] However, this should not be construed as limiting the scope of the above subject matter of the present invention to the following examples.

Embodiment 1

[0034] The crude gas obtained after the Lurgi coal gasifier is used as the raw material, and the main components are shown in the table below. The crude gas enters the reactor 1 (tank reactor) at 1Kmol / hr, the circulation rate of water in the reactor is maintained at 50Kmol / hr, the reaction temperature is 250°C, the pressure is 5.0MPa, and the catalyst is Ni / Al 2 o 3 The methanation catalyst separates water through the condensation separator 2, and removes CO with the CaO removal tower 3 2 The product gas composition and flow rate are shown in the table below:

[0035] Table 1 Composition table of feed gas

[0036]

[0037] Table 2 Product Gas Composition Table

[0038]

Embodiment 2

[0040]The crude gas obtained after the Shell coal gasifier is used as the raw material, and the main components are shown in the table below. The raw gas is passed into the reactor 1 at a rate of 1Kmol / hr, the circulation rate of water in the reactor is maintained at 60Kmol / hr, the reaction temperature is 255°C, and the pressure is 5.5MPa. All the other conditions are as shown in Example 1. After separating water and removing CO 2 The product gas composition and flow rate are shown in the table below:

[0041] Table 3 Feed gas composition table

[0042]

[0043] Table 4 Product Gas Composition Table

[0044]

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 provides a method for preparing a synthetic natural gas. The method comprises the step of performing a methanation reaction on a raw material gas which contains CO, CO2 and H2 in the presence of liquid saturated water. The invention also provides a device for implementing the method. The device comprises a methanator which is provided with a raw material gas inlet, a product outlet,and a nickel-based catalysts and liquid water inlet. The method of the invention is convenient and easy, and is suitable for various raw material gases; the ratio of H2 to CO in the raw material gas is improved by a water gas shift reaction; and a great amount of heat released by the methanation reaction is removed fast by vaporizing the liquid saturated water, so that a reaction temperature is controlled effectively, high-temperature carbon deposit of a catalyst is slowed down and the service life of the catalyst is prolonged. The device of the invention has the characteristics of simple structure and convenient operation.

Description

technical field [0001] The invention relates to a method for preparing synthetic natural gas by utilizing CO-containing gas, especially a method for preparing synthetic natural gas through methanation reaction. technical background [0002] In response to the lack of natural gas in my country, especially the gas shortage in the north in the winter of 2009, the development of synthetic natural gas preparation technology has become a research focus. An important step in the process of producing synthetic natural gas is the CO / CO 2 Methanation reaction to increase CH in product gas 4 content, the reaction equation is as follows: [0003] CO+3H 2 =CH 4 +H 2 o [0004] CO 2 +4H 2 =CH 4 +2H 2 o [0005] When H in raw gas 2 When the :CO ratio is less than 3, a water vapor shift reaction is required to increase the H 2 : CO ratio, the conversion reaction equation is: [0006] CO+H 2 O=CO 2 +H 2 [0007] Among them, the methanation reaction is a strongly exothermic ...

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): C10L3/08
Inventor 骆念军计扬毛彦鹏张博柳刚
Owner PUJING CHEM IND SHA
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