Technology for preparing natural gas through sulfur resistant methanation by coal-prepared synthesis gases

A technology of sulfur-resistant methanation and coal-to-synthesis gas, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of affecting the quality of natural gas, reducing the conversion rate, increasing equipment investment and energy consumption, etc., and achieving the reduction of sulfur-resistant Effects of changing units, reducing equipment size and energy consumption, and saving investment and operating costs

Active Publication Date: 2014-11-19
SEDIN ENG +1
View PDF13 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although coal-to-natural gas is the best choice for coal cleanliness and optimal utilization, there are still many problems in the above-mentioned industrial coal-to-natural gas technology due to the limitation of methanation nickel-based catalysts: (1) The low-temperature methanol washing makes the synthesis gas have to undergo "thermal (transformation) )-cold (methanol washing)-heat (methanation)-cold (cooling compression)", the temperature has been varied from 300 to 400°C to -40°C for many times, greatly increasing equipment investment, energy consumption and operating costs; ( 2) The separate sulfur-resistant conversion unit not only increases equipment investment and energy consumption, but also due to the low heat release of water vapor conversion, when the syngas temperature and water vapor content fluctuate, it often encounters the phenomenon that the conversion temperature is too low , so that the organic sulfur in the synthesis gas cannot be completely converted into inorganic sulfur, thereby affecting the subsequent sulfur recovery efficiency; (3) Met

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
  • Technology for preparing natural gas through sulfur resistant methanation by coal-prepared synthesis gases
  • Technology for preparing natural gas through sulfur resistant methanation by coal-prepared synthesis gases
  • Technology for preparing natural gas through sulfur resistant methanation by coal-prepared synthesis gases

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] In this embodiment, the catalyst used in sulfur-resistant methanation reactor I and sulfur-resistant methanation reactor II is the same, and the oxide mass composition is MoO 3 25wt%-Co 2 O 3 +ZrO 2 15wt% / CeO 2 -Al 2 O 3 60wt% catalyst, active component MoO 3 And additives Co 2 O 3 +ZrO 2 Loaded on CeO carrier by impregnation 2 -Al 2 O 3 Above, the specific preparation method and process are shown in CN102463118A Example 5; the nickel-based catalysts in the methanation reactor I and the methanation reactor II use Topsoe's MCR-2X catalyst. Using the above catalyst, the specific process and conditions are as follows:

[0037] (1) The volume composition after dust removal and oil removal is H 2 39%, CO 19.6%, CO 2 31.5%, CH 4 9.5% and N 2 The 0.4% synthesis gas first exchanges heat through the inlet and outlet heat exchanger II and the outlet gas of the sulfur-resistant methanation reactor II, and then passes through the inlet and outlet heat exchanger I and t...

Example Embodiment

[0041] Example 2

[0042] In this embodiment, the catalyst used in sulfur-resistant methanation reactor I and sulfur-resistant methanation reactor II is the same, and the oxide mass composition is MoO 3 30wt%-Co 2 O 3 +Fe 2 O 3 +NiO 20wt% / CeO 2 -Al 2 O 3 50wt% catalyst, active component MoO 3 And additives Co 2 O 3 +Fe 2 O 3 +NiO is supported on CeO by impregnation 2 -Al 2 O 3 For the above, the specific preparation method and process are shown in CN102463118A Example 5; the nickel-based catalysts of the methanation reactor I and the methanation reactor II adopt Topsoe's MCR-2X catalyst. Using the above catalyst, the specific process and conditions are as follows:

[0043] (1) The volume composition after dust removal and oil removal is H 2 40%, CO 20%, CO 2 31.7%, CH 4 8.0% and N 2 0.3% of the synthesis gas first exchanges heat through the inlet and outlet heat exchanger II and the outlet gas of the sulfur-resistant methanation reactor II, and then exchanges heat up to 275 through ...

Example Embodiment

[0047] Example 3

[0048] In this embodiment, the catalyst used in sulfur-resistant methanation reactor I and sulfur-resistant methanation reactor II is the same, and its mass composition is MoO 3 35wt%-Co 2 O 3 +KO 2 2wt% / ZrO 2 63wt% catalyst, active component MoO 3 And additives Co 2 O 3 +KO 2 Supported on carrier ZrO by impregnation 2 For the above, the specific preparation method and process are shown in CN103495421A Example 14; the nickel-based catalysts of the methanation reactor I and the methanation reactor II use Davy's CEG-LH catalyst. Using the above catalyst, the specific process and conditions are as follows:

[0049] (1) The volume composition after dust removal and oil removal is H 2 40%, CO 20%, CO 2 30.3%, CH 4 9.5% and N 2 The 0.2% synthesis gas first exchanges heat through the inlet and outlet heat exchanger II and the outlet gas of the sulfur-resistant methanation reactor II, and then exchanges heat up to 280 through the inlet and outlet heat exchanger I and the ...

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 technology for preparing natural gas through sulfur resistant methanation by coal-prepared synthesis gases, which is characterized in that coal-prepared synthesis gases is subjected to secondary sulfur resistant transformation and methanation reaction on a molybdenum-based bifunctional catalyst, then is eluted by methanol at low temperature to remove acidic gas, and finally, the Ni-based methanation catalyst is used for performing secondary methanation reaction on unreacted CO and H2 to obtain the excellent natural gas product. The technology for preparing natural gas has the advantages of simple process flow, less equipment investment, low comprehensive energy consumption and excellent natural gas product.

Description

technical field [0001] The invention belongs to a process for producing natural gas from coal, in particular to a process for producing natural gas through sulfur-resistant methanation of synthetic gas produced from coal. Background technique [0002] my country is rich in coal, poor in oil and low in gas, and the proportion of natural gas consumption is far lower than the world average. In recent years, with the rapid increase of natural gas demand in my country, the gap between domestic natural gas supply and demand has gradually increased, which in turn has restricted the steady and rapid development of my country's national economy. Coal-to-natural gas is a technology that uses coal as raw material to produce natural gas. It can convert coal into a clean fuel CH that is convenient for long-distance transportation. 4 , is an important way to optimize the domestic energy structure, alleviate the contradiction between supply and demand of natural gas, and realize the effic...

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 张庆庚范辉崔晓曦李晓李德宝贾丽涛孙德魁马英民
Owner SEDIN ENG
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