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

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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 it is easy to polycondense under high-temperature hydrogen-rich conditions to form macromolecular coke, making the active components of conventional catalysts Inactivation, reaction system coking

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
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Effect test

Embodiment 1

[0025] Weigh 40g γ-Al 2 o 3 The carrier was calcined in a muffle furnace at 500°C for 4 hours. Take Mg(NO 3 ) 2 ·6H 2 O25.6g, dissolved in 20mL deionized water, stirred and dissolved to make impregnation solution. Pour the impregnation solution into the roasted γ-Al 2 o 3 In the carrier, after ultrasonic impregnation at 60°C for 5 hours, put it in an oven at 105°C to dry for 8 hours, and then bake it in a muffle furnace with a heating rate of 2°C / min and a final temperature of 800°C for 5 hours , to prepare a carrier sample impregnated with auxiliary components. Take Ni(NO 3 ) 2 ·6H 2 O19.6g, dissolved in 20mL deionized water, configured as an aqueous solution, then mixed the aqueous solution with the carrier sample of the impregnation aid component, impregnated at 60°C for 5 hours, and then dried it in an oven at 105°C for 8 Hours, and then roasted in a muffle furnace, the heating rate is 2 ° C / min, the temperature is 650 ° C, kept for 5 hours, and the finished c...

Embodiment 2

[0027] Weigh 40g γ-Al 2 o 3 The carrier was calcined in a muffle furnace at 550°C for 5 hours. Take Mg(NO 3 ) 2 ·6H 2 O51.2g, dissolved in 20mL deionized water, stirred and dissolved to make impregnation solution. Pour the impregnation solution into the roasted γ-Al 2 o 3 In the carrier, keep the temperature at 60°C for 5 hours, put it in an oven at 105°C and dry it for 8 hours, and then bake it in a muffle furnace with 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 deionized water, configured as an aqueous solution, then mixed the aqueous solution with the carrier sample of the impregnation aid component, impregnated at 60°C for 5 hours, and then dried it in an oven at 105°C for 8 Hours, and then roasted in a muffle furnace, the heating rate is 2 ° C / min, the final temperature is 650 ° C, and kept for 5 hours to obtain the fin...

Embodiment 3

[0029] Weigh 40g γ-Al 2 o 3 The carrier was calcined 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 impregnation solution. Pour the impregnation solution into the roasted γ-Al 2 o 3 In the carrier, the temperature was kept at 60°C for 5 hours, and then placed in an oven at 105°C to dry for 8 hours, and then roasted in a muffle furnace with a heating rate of 2°C / min and a temperature of 800°C 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, configured as an aqueous solution, then mixed the aqueous solution with the carrier sample of the impregnation aid component, impregnated at 60°C for 5 hours, and then dried it in an oven at 105°C for 8 Hours, and then roasted in a muffle furnace, the heating rate is 2 ° C / min, the final temperature is 650 ° C, and kept for 5 hours to obtain the finish...

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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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