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Catalytic reforming catalyst for catalytic pyrolysis of waste plastic for preparing fuel oil and preparation method thereof

A catalytic upgrading and catalytic cracking technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of complex processing operations, low light oil ratio, and low oil yield, etc. The effect of high catalytic activity, good oil quality and less catalyst coking

Inactive Publication Date: 2011-01-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of the catalyst of the present invention can solve the problem that the catalyst existing in the catalytic cracking of mixed waste plastics to oil has strict requirements on the pre-selection and pretreatment of waste plastics, and the processing operation is complicated, especially for the cracking and oiling of garbage mixed waste plastics with a small amount of sundries. It is difficult to control; the distribution range of waste plastic cracking products is too wide, a large amount of heavy oil and gas are produced, the ratio of light oil is low, and it is easy to secondary pollution, as well as the problem of low oil yield and unstable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of catalyst for catalytic cracking and upgrading of crude oil in the second stage: Add 150 parts of bismuth nitrate / nitric acid containing 2.0wt% bismuth and 1.0wt% molybdenum to 100 parts hydrogen ZSM-35 (silicon-aluminum ratio 20) Molybdenum aqueous solution, soaked at 80°C for 2 hours, dried at 150°C for 1 hour, and then activated at 520°C for 3 hours, the content of bismuth oxide was determined to be 1.5wt% / molybdenum oxide was 0.7wt%. Material modified ZSM-5 catalyst.

[0018] The catalyst is used in waste plastic cracking oil production process: 100 kg of crushed waste plastic and 2.0% of the total weight of waste plastic are continuously mixed and fed at the inlet of one end of the tubular bed. The waste plastics are dehydrated, and then the waste plastics are pyrolyzed at a temperature of 380-390 ° C. The crude oil yield of this pyrolysis process is 82.8% based on waste plastics.

[0019] The second-stage catalyst is used to heat and vaporize the cr...

Embodiment 2

[0021] Preparation of catalyst for catalytic cracking and upgrading of crude oil in the second stage: Add 150 parts of cerium nitrate / lead nitrate aqueous solution containing 2.0wt% cerium and 15.0wt% lead to 100 parts hydrogen Beta (silicon-alumina ratio: 24) , impregnated at 80°C for 2 hours, dried at 150°C for 1 hour, and then activated at 520°C for 3 hours. It was determined that the content of cerium oxide was 1.6wt% / the content of lead oxide was 11.6wt%, that is, the modified oxide was obtained. Sexual USY catalyst.

[0022] Catalyst used in waste plastic cracking oil production process: 100 kg of crushed waste plastic at the entrance of one end of the tubular bed and a stage of alumina-modified montmorillonite catalyst powder with a total weight of 1.8% of waste plastic are continuously mixed and fed. The waste plastics are dehydrated at 240°C, and then the waste plastics are pyrolyzed at a temperature of 390-400°C. The crude oil yield of this cracking process is 81.4% ...

Embodiment 3

[0025] Preparation of the catalyst for catalytic cracking of crude oil in the second stage: Add 150 parts of nitric acid containing 7.0wt% zirconium and 8.0wt% cerium to 100 parts of commercially available hydrogen-form MCM-22 (silicon-aluminum ratio 32) Zirconium / cerium nitrate aqueous solution, soaked at 80°C for 2 hours, dried at 150°C for 1 hour, and then activated at 520°C for 3 hours, determined to contain 5.2wt% zirconia / 6.1wt% cerium oxide, namely The oxide modified MCM-22 catalyst was prepared.

[0026] Catalyst used in waste plastic cracking oil production process: 100 kg of crushed waste plastics at the inlet of one end of the tubular bed and a stage of alumina modified montmorillonite catalyst powder with a total weight of 2.6% of waste plastics are continuously mixed and fed. The waste plastics are dehydrated at 240°C, and then the waste plastics are pyrolyzed at a temperature of 390-400°C. The crude oil yield in this cracking process is 82.5% based on waste plast...

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Abstract

The invention relates to a catalytic reforming catalyst for catalytic pyrolysis of waste plastic for preparing fuel oil and a preparation method thereof. The catalyst consists of oxides and an MCM-22, ZSM-35, Beta or MOR molecular sieve, wherein the oxides are any two of molybdenum oxide, cerium oxide, bismuth oxide, zirconium oxide, tin oxide or lead oxide in a weight ratio of 1 / 10 to 10 / 1; and secondary catalytic pyrolysis, isomerization and an aromatized reforming reaction are performed on crude oil formed by cracking the waste plastic, so that the ratio of cracked gasoline fractions to cracked diesel fractions is increased. The catalyst of the invention has the advantages of high activity, high selectivity and particular suitability for pyrolysis of mixed waste plastic in urban and rural household garbage with complex components for preparing oil, wherein the yield of the qualified fuel oil is over 70 percent based on the weight of the waste plastic.

Description

technical field [0001] The invention relates to a catalytic reforming catalyst used in the process of preparing fuel oil by catalytic cracking of waste plastics and a preparation method thereof. The catalytic cracking of the catalyst of the present invention has good controllability, and the yield rate of qualified fuel oil can be as high as 70% based on waste plastics Above, the oil quality is good, gasoline is No. 90, and diesel oil is No. O to minus No. 20. Background technique [0002] A large amount of waste and old plastics produced in daily garbage seriously endanger the living environment of human beings, and are called "white garbage". White garbage is also the most troublesome environmental governance problem for governments of all countries. In the past ten years, there have been many reports on the method of using waste plastics to crack fuel oil, and many waste plastics cracking and fuel oil plants have been established in China. In the gap or semi-gap kettle o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/69B01J29/08B01J29/70B01J29/78C10G1/00
Inventor 朱志荣胡中华吴倩伍艳辉
Owner TONGJI UNIV
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