Check patentability & draft patents in minutes with Patsnap Eureka AI!

Process for preparing natural gas from synthetic gas

A process method and technology for synthesis gas, which are applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of poor product purity, low reaction efficiency, low carbon conversion rate, etc., and achieve high production efficiency, clean production products, and carbon efficiency. and high thermal efficiency

Active Publication Date: 2011-03-16
EAST CHINA UNIV OF SCI & TECH
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above process contains low-temperature methane synthesis process (maximum reaction temperature <500°C), which has the problems of low reaction efficiency, poor product purity, low thermal efficiency, high production cost, and low carbon conversion rate.

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 preparing natural gas from synthetic gas
  • Process for preparing natural gas from synthetic gas
  • Process for preparing natural gas from synthetic gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example uses the figure 1 , figure 2 , image 3 process, and the results are shown in Table 1. The fresh gas is the synthesis gas produced by multi-nozzle coal-water slurry gasification. After washing with low-temperature methanol, the temperature is 40°C, the pressure is 56bar, and the gas composition is H 2 : 75%, CO: 25%, the gas volume is 225500kmol / h, the fresh gas 1 is preheated through the secondary circulating gas, and the temperature is preheated to 250°C, the reaction gas 2 passes through the primary guard bed reactor unit A, and the temperature rises to 320°C. The primary guard bed reactor A is an adiabatic fixed bed reactor A with a reactor height of 5.0m, an inner diameter of 2.8m, a loading capacity of low-temperature nickel-based catalyst of 25.3 tons, an operating pressure of 56bar, and an operating temperature of 250-320°C , The guard bed reactor produces 2254kmol / h of methane.

[0035]Stream 3 is mixed with secondary cycle tail gas 11 to for...

Embodiment 2

[0042] The methane synthesis part of embodiment 2 is different from that of embodiment 1, while the methane purification unit and the heat recovery unit are the same as those of embodiment 1. For the methane synthesis unit of embodiment 2, see Figure 4 , and the results are shown in Table 2. The composition, temperature and pressure of the inlet fresh gas 51 are the same as those in Example 1, the main difference being that in Example 2, the tail gas of the tertiary methane synthesis reactor unit is divided into two parts, streams 67, 69 and stream 67, after the second-stage heat exchange. After passing through the compressor Q, it is mixed with the tail gas of the secondary reactor unit to form stream 63, which enters the tertiary methane synthesis reactor unit.

[0043] The primary guard bed reactor is an adiabatic fixed bed reactor M with a reactor height of 6.0m, an inner diameter of 2.8m, a loading capacity of low-temperature nickel-based catalyst of 25.3 tons, an operat...

Embodiment 3

[0049] The methane synthesis part of embodiment 3 is all different from embodiment 1 and embodiment 2, and the purification unit and heat recovery unit are the same as embodiment 1, for the methane synthesis unit of embodiment 3 see Figure 5 , and the results are shown in Table 3. The composition, temperature and pressure of the inlet fresh gas 81 are the same as those in Example 1, the main difference being that the tail gas of the tertiary methane synthesis reactor unit in Example 3 is divided into two parts streams 91 and 92 after passing through a section of heat exchange, and the stream 92 passes through After the compressor X, it is mixed with the tail gas of the primary reactor unit U to form a stream 84, which enters into the V unit of the secondary methane synthesis reactor.

[0050] The primary guard bed reactor is an adiabatic fixed bed reactor U with a reactor height of 6.0m, an inner diameter of 2.8m, a loading capacity of low-temperature nickel-based catalyst of...

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 preparing natural gas from synthetic gas. A device for implementing the process comprises three parts, namely a methane synthesizing unit, a natural gas purifying unit and a heat recovering unit, wherein the methane synthesizing unit is divided into five stages of which the products are natural gas; the feed gases synthesized by the methane of the second to fifth stages are tail gases synthesized by the methane of the first to the fourth stages; the tail gas of the fifth stage of synthesizing unit is finally fed into the natural gas purifying unit; and the natural gas purifying unit purifies the tail gas by a deep cooling method so as to produce superior natural gas. Compared with the prior art, the process has the characteristics of high reaction rate, high process carbon conversion rate, clean products, low cost and the like.

Description

technical field [0001] The invention relates to a method for producing natural gas, in particular to a process for producing natural gas with synthesis gas. Background technique [0002] With the rapid expansion of the world's population and economy, the demand for energy supply is becoming more and more urgent. Among the three main energy sources (coal, oil, and natural gas), natural gas has the characteristics of clean combustion and convenient use, and the CO released by a unit of heat 2 The least, no other pollutant emissions, is considered to be the cleanest energy. However, my country's natural gas reserves are very limited, and they are mainly distributed in the less developed Central and Western Basins. Natural gas will inevitably be in short supply in the near future. Coal-to-natural gas can be transformed into pits in coal-rich areas, and then transported to long-distance consumer markets by pipelines, reducing transportation costs and relieving transportation pr...

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): C10L3/08C10L3/10
Inventor 王兴军于广锁王辅臣龚欣刘海峰王亦飞代正华陈雪莉周志杰李伟锋郭晓镭梁钦锋许建良郭庆华
Owner EAST CHINA UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com