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

Method for increasing coal pyrolysis tar yield by return catalytic conversion of pyrolysis gas

A technology for catalytic conversion and tar yield, applied in coke ovens, petroleum industry and other directions, can solve problems such as increased cost and low tar yield, and achieve the effects of improving yield and quality, simple production process and convenient operation

Inactive Publication Date: 2015-06-17
SHIHEZI UNIVERSITY
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tar yield in the ordinary pyrolysis process is low, and the cost of hydropyrolysis increases sharply due to the high price of hydrogen; therefore, the development of new pyrolysis processes to replace coal hydropyrolysis has become a new direction for coal pyrolysis

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 for increasing coal pyrolysis tar yield by return catalytic conversion of pyrolysis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] N 2 Atmosphere pyrolysis

[0017] The 30-60 mesh granular coal sample is in the pyrolysis temperature range of 500°C-650°C, N 2 Pyrolysis at a space velocity of 2400mL / g·h and a residence time of 30min. The tar yields at 500°C, 550°C, 600°C, and 650°C were 4.14%, 4.12%, 4.43%, and 4.55%, respectively. The corresponding yields of n-hexane solubles are 64.26%, 59.32%, 57.13%, 53.63%.

Embodiment 2

[0019] Pyrolysis under pyrolysis atmosphere

[0020] The 30-60 mesh granular coal sample is pyrolyzed at a pyrolysis temperature range of 500°C-650°C, a pyrolysis gas space velocity of 2400mL / g·h, and a residence time of 30min. The tar yields at 500°C, 550°C, 600°C, and 650°C were 4.61%, 5.17%, 5.03%, and 4.46%, respectively. The corresponding yields of n-hexane solubles are 73.96%, 65.35%, 58.45%, 66.44%.

Embodiment 3

[0022] Ni / Al 2 o 3 Catalytic activation of pyrolysis gas pyrolysis

[0023] The selected catalyst is Ni / Al 2 o 3 , and its preparation method is: at 20-40 mesh Al 2 o 3 impregnated with 10-20wt% Ni(NO 3 ) 2 , dried at 110°C for 12h, calcined at 800°C for 4h, and reduced at 600°C for 4h.

[0024] The 30-60 mesh granular coal sample is pyrolyzed at a pyrolysis temperature range of 500°C-650°C, a pyrolysis gas space velocity of 2400mL / g·h, and a residence time of 30min. The tar yields at 500°C, 550°C, 600°C, and 650°C were 3.45%, 5.02%, 4.90%, and 4.57%, respectively. The corresponding yields of n-hexane solubles are: 74.68%, 81.51%, 78.46%, 77.50%.

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 promoting bituminous coal pyrolysis and increasing a tar yield by catalytic conversion of pyrolysis gas generated by coal pyrolysis. In the invention, the pyrolysis gas generated by coal pyrolysis is used as reaction gas; in the coal pyrolysis process, the pyrolysis gas passes through a catalyst layer at first so as to carry out catalytic gasification reaction under the action of a catalyst, so that a gas flow containing methane is generated; and then, the gas flow enters a coal seam so as to carry out pyrolysis of a coal sample under the reaction gas. According to the invention, the catalyst is a nickel-containing catalyst; reforming reaction of CO, CO2 and CH4 can be carried out under the catalysis of nickel; an intermediate body generated in the reforming process can be used for stably pyrolyzing generated macromolecular radicals, so that the tar yield is increased; because the pyrolysis gas is used as the reaction gas, the cost due to addition of gases, such as hydrogen and methane, in the pyrolysis process can be reduced; simultaneously, the pyrolysis gas generated by coal pyrolysis is also recycled; the coal tar yield is also higher than the tar yield in N2 atmosphere under same conditions; and furthermore, due to layering in the pyrolysis process, the catalyst can be recycled.

Description

technical field [0001] The invention belongs to the technical field of energy, and relates to a method for increasing the yield of coal pyrolysis tar by using pyrolysis gas as a reaction gas and activating the pyrolysis gas through a catalyst. Background technique [0002] At present, while the total amount of world energy consumption continues to expand, it has the following two important characteristics: First, the growth rate of energy demand in developed countries has slowed down, and the energy consumption of developing countries represented by the Asia-Pacific region has risen rapidly. Second, the world's energy consumption structure is increasingly diversified. The production and consumption of oil and natural gas continue to rise. The problems of fossil energy depletion and energy and environmental pollution still plague mankind. Because coal has a reliable resource guarantee in replacing oil and natural gas resources, and already has a good technical foundation. ...

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): C10B57/00
Inventor 张建树张丹郭瑞丽
Owner SHIHEZI UNIVERSITY
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