Catalyst for lightening tar by catalytic pyrolysis and preparation method of catalyst

A technology for catalytic pyrolysis and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the deactivation of active components, poor cracking performance, reaction system coking and other problems, to achieve the effect of promoting light weight

Inactive Publication Date: 2014-06-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, coal tar contains a large amount of heteroatoms such as sulfur, nitrogen, oxygen, polycyclic aromatic hydrocarbons, and asphaltenes, and its cracking performance is poor, and

Method used

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  • Catalyst for lightening tar by catalytic pyrolysis and preparation method of catalyst
  • Catalyst for lightening tar by catalytic pyrolysis and preparation method of catalyst
  • Catalyst for lightening tar by catalytic pyrolysis and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] Weigh 40g γ-Al 2 O 3 The carrier is calcined in a muffle furnace at 500°C for 4 hours. Take Mg(NO 3 ) 2 ·6H 2 O25.6g, dissolved in 20mL of deionized water, stirred and dissolved to make an immersion liquid. Pour the impregnating solution into the roasted γ-Al 2 O 3 The carrier is ultrasonically immersed for 5 hours at a temperature of 60°C, then dried in an oven at 105°C for 8 hours, and then calcined in a muffle furnace at a heating rate of 2°C / min, and a final temperature of 800°C for 5 hours. , Prepare the carrier sample of impregnation auxiliary component. Take Ni(NO 3 ) 2 ·6H 2 O19.6g, dissolved in 20mL of deionized water, prepared as an aqueous solution, and then mixed the aqueous solution with the carrier sample of the impregnation aid component, soaked at 60℃ for 5 hours, and then placed it in an oven at 105℃ for drying 8 After hours, it is calcined in a muffle furnace at a heating rate of 2°C / min and a temperature of 650°C for 5 hours to obta...

Example Embodiment

[0026] Example 2:

[0027] Weigh 40g γ-Al 2 O 3 The carrier was fired in a muffle furnace at 550°C for 5 hours. Take Mg(NO 3 ) 2 ·6H 2 O51.2g, dissolved in 20mL of deionized water, stirred and dissolved to make an immersion liquid. Pour the impregnating solution into the roasted γ-Al 2 O 3 After being immersed in the carrier for 5 hours at a temperature of 60°C, it is placed in an oven at 105°C for drying for 8 hours, and then calcined in a muffle furnace at a heating rate of 2°C / min, and a final temperature of 850°C for 5 hours. A carrier sample of the impregnation aid component was prepared. Take Ni(NO 3 ) 2 ·6H 2 O19.6g, dissolved in 20mL of deionized water, prepared as an aqueous solution, and then mixed the aqueous solution with the carrier sample of the impregnation aid component, soaked at 60℃ for 5 hours, and then placed it in an oven at 105℃ for drying 8 After hours, it is calcined in a muffle furnace at a heating rate of 2°C / min, and a final temperature of 650°C. Keep...

Example Embodiment

[0028] Example 3:

[0029] Weigh 40g γ-Al 2 O 3 The carrier was fired in a muffle furnace at 550°C for 5 hours. Take Mg(NO 3 ) 2 ·6H 2 O38.4g, dissolved in 20mL deionized water, stirred and dissolved to make an immersion liquid. Pour the impregnating solution into the roasted γ-Al 2 O 3 After immersing in the carrier for 5 hours at a temperature of 60°C, it is placed in an oven at 105°C for drying for 8 hours, and then calcined in a muffle furnace at a heating rate of 2°C / min, a temperature of 800°C, and holding for 5 hours. Obtain a carrier sample of the impregnation aid component. Take Ni(NO 3 ) 2 ·6H 2 O10.8g, dissolved in 20mL deionized water, prepared as an aqueous solution, and then mixed the aqueous solution with the carrier sample of the impregnation aid component, immersed at 60℃ for 5 hours, and then put it in a 105℃ oven to dry 8 After hours, it is calcined in a muffle furnace at a heating rate of 2°C / min, a final temperature of 650°C, and maintained for 5 hours to o...

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Abstract

At present, tar generated in most of coal pyrolysis processes has the shortcoming of having high yield of heavy components. Due to the heavy components in the tar, the grade and the value of a tar product are reduced and a series of problems of dust entrainment, pipeline blockage, difficulty in high-temperature air-solid separation, high subsequent treatment cost and the like can be caused in the pyrolysis process due to high viscosity of the heavy components. Pyrolysis tar can be lightened by adopting a process in which the direct catalyzing and conditioning are carried out on high-temperature pyrolysis gas. The tar lightening can be remarkably facilitated by an Al-Mg-Ni-O catalyst provided by the invention. The catalyst comprises the following components by weight percent: 1%-10% of NiO, 10%-20% of MgO and the balance being a gamma-Al2O3 carrier. After the high-temperature pyrolysis coal gas is catalyzed and reformed by the catalyst, the contents of the heavy components in the tar product are reduced and the yields of BTX (benzene toluene xylene) and PCX (phenol cresol xylenol) are greatly increased. Meanwhile, the catalyst has the advantages of low price, good heat stability, carbon deposition resistance and the like.

Description

technical field [0001] The invention relates to the technical field of energy conversion, in particular to a catalyst used for catalytic pyrolysis of carbonaceous substances to extract oil and gas products to realize tar lightening and a preparation method thereof. Background technique [0002] With the shortage of oil resources and rising oil prices, it is imperative to seek alternative liquid fuels. my country is rich in coal resources and is one of the largest coal utilization countries in the world. Pyrolysis of coal, especially low-rank coal with high volatile content, can make full use of the rich aromatic structure in the molecular structure of coal to obtain liquid and gaseous products. efficient use of coal. However, the pyrolysis technology has not yet been commercialized, and the main problems are low quality of pyrolysis oil (more heavy tar components), difficulty in high-temperature gas-solid separation, and high dust entrainment in oil. This is because heavy t...

Claims

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Application Information

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IPC IPC(8): B01J23/755C10G1/06C10B53/02C10B53/06
CPCY02E50/10
Inventor 李益陈子珍吕兴梅张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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